./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8 --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- 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-e04fb08 [2022-11-16 11:40:08,360 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:40:08,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:40:08,383 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:40:08,384 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:40:08,385 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:40:08,386 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:40:08,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:40:08,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:40:08,391 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:40:08,392 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:40:08,394 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:40:08,394 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:40:08,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:40:08,397 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:40:08,398 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:40:08,399 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:40:08,400 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:40:08,402 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:40:08,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:40:08,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:40:08,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:40:08,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:40:08,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:40:08,413 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:40:08,413 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:40:08,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:40:08,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:40:08,415 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:40:08,416 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:40:08,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:40:08,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:40:08,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:40:08,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:40:08,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:40:08,421 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:40:08,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:40:08,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:40:08,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:40:08,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:40:08,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:40:08,426 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:40:08,451 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:40:08,451 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:40:08,451 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:40:08,452 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:40:08,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:40:08,453 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:40:08,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:40:08,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:40:08,454 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:40:08,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:40:08,455 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:40:08,455 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:40:08,455 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:40:08,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:40:08,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:40:08,456 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:40:08,456 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:40:08,457 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:40:08,457 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:40:08,457 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:40:08,457 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:40:08,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:40:08,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:40:08,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:40:08,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:40:08,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:40:08,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:40:08,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:40:08,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:40:08,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:40:08,460 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_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-11-16 11:40:08,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:40:08,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:40:08,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:40:08,873 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:40:08,874 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:40:08,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-16 11:40:08,965 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/840ddff2c/844f48530d07464e948ed5258d80a180/FLAG2af2442df [2022-11-16 11:40:09,693 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:40:09,694 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-16 11:40:09,711 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/840ddff2c/844f48530d07464e948ed5258d80a180/FLAG2af2442df [2022-11-16 11:40:09,924 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/840ddff2c/844f48530d07464e948ed5258d80a180 [2022-11-16 11:40:09,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:40:09,928 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:40:09,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:40:09,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:40:09,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:40:09,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:40:09" (1/1) ... [2022-11-16 11:40:09,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29c967d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:09, skipping insertion in model container [2022-11-16 11:40:09,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:40:09" (1/1) ... [2022-11-16 11:40:09,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:40:09,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:40:10,531 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:40:10,548 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) [2022-11-16 11:40:10,549 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6618d78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:10, skipping insertion in model container [2022-11-16 11:40:10,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:40:10,549 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2022-11-16 11:40:10,551 INFO L158 Benchmark]: Toolchain (without parser) took 622.04ms. Allocated memory is still 127.9MB. Free memory was 84.0MB in the beginning and 96.5MB in the end (delta: -12.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:40:10,552 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 127.9MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:40:10,553 INFO L158 Benchmark]: CACSL2BoogieTranslator took 618.29ms. Allocated memory is still 127.9MB. Free memory was 83.8MB in the beginning and 96.5MB in the end (delta: -12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 11:40:10,555 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 127.9MB. Free memory is still 102.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 618.29ms. Allocated memory is still 127.9MB. Free memory was 83.8MB in the beginning and 96.5MB in the end (delta: -12.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8 --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 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 --- 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-e04fb08 [2022-11-16 11:40:12,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:40:12,687 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:40:12,706 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:40:12,706 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:40:12,708 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:40:12,709 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:40:12,711 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:40:12,713 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:40:12,714 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:40:12,715 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:40:12,717 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:40:12,717 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:40:12,718 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:40:12,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:40:12,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:40:12,721 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:40:12,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:40:12,724 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:40:12,726 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:40:12,728 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:40:12,729 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:40:12,730 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:40:12,731 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:40:12,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:40:12,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:40:12,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:40:12,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:40:12,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:40:12,739 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:40:12,739 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:40:12,740 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:40:12,741 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:40:12,742 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:40:12,743 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:40:12,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:40:12,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:40:12,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:40:12,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:40:12,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:40:12,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:40:12,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-16 11:40:12,774 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:40:12,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:40:12,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:40:12,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:40:12,776 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:40:12,777 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:40:12,778 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:40:12,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:40:12,778 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:40:12,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:40:12,779 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:40:12,779 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:40:12,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:40:12,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:40:12,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:40:12,780 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:40:12,781 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:40:12,781 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:40:12,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:40:12,782 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:40:12,782 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-16 11:40:12,782 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-16 11:40:12,783 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:40:12,783 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:40:12,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:40:12,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:40:12,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:40:12,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:40:12,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:40:12,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:40:12,785 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-16 11:40:12,785 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-16 11:40:12,786 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-16 11:40:12,786 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_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7f08d75c904d21d6573220c7737d451cd978e8a22a153e855f8d685d88a1eb60 [2022-11-16 11:40:13,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:40:13,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:40:13,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:40:13,159 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:40:13,162 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:40:13,169 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-16 11:40:13,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/10ef98d14/bf4f9d09cda94d0fb1162022c17b1e01/FLAG853aa3fca [2022-11-16 11:40:14,040 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:40:14,041 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/sv-benchmarks/c/ldv-memsafety/memleaks_test12-2.i [2022-11-16 11:40:14,056 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/10ef98d14/bf4f9d09cda94d0fb1162022c17b1e01/FLAG853aa3fca [2022-11-16 11:40:14,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/data/10ef98d14/bf4f9d09cda94d0fb1162022c17b1e01 [2022-11-16 11:40:14,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:40:14,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:40:14,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:40:14,247 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:40:14,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:40:14,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:14,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11181960 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14, skipping insertion in model container [2022-11-16 11:40:14,254 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:14,261 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:40:14,302 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:40:14,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:40:14,796 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2022-11-16 11:40:14,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:40:14,869 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:40:14,876 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:40:14,939 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:40:14,987 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:40:14,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14 WrapperNode [2022-11-16 11:40:14,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:40:14,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:40:14,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:40:14,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:40:14,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,021 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,055 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 332 [2022-11-16 11:40:15,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:40:15,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:40:15,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:40:15,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:40:15,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,073 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,133 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,156 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:40:15,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:40:15,157 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:40:15,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:40:15,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (1/1) ... [2022-11-16 11:40:15,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:40:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:40:15,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:40:15,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:40:15,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2022-11-16 11:40:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-16 11:40:15,263 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-11-16 11:40:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-11-16 11:40:15,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-11-16 11:40:15,265 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-11-16 11:40:15,265 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2022-11-16 11:40:15,267 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2022-11-16 11:40:15,272 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2022-11-16 11:40:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2022-11-16 11:40:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-11-16 11:40:15,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-11-16 11:40:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2022-11-16 11:40:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2022-11-16 11:40:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:40:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:40:15,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2022-11-16 11:40:15,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2022-11-16 11:40:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 11:40:15,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-16 11:40:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2022-11-16 11:40:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-16 11:40:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2022-11-16 11:40:15,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:40:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-16 11:40:15,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-16 11:40:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2022-11-16 11:40:15,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:40:15,280 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:40:15,594 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:40:15,612 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:40:15,616 WARN L816 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2022-11-16 11:40:17,148 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:40:17,170 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:40:17,170 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 11:40:17,173 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:40:17 BoogieIcfgContainer [2022-11-16 11:40:17,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:40:17,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:40:17,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:40:17,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:40:17,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:40:14" (1/3) ... [2022-11-16 11:40:17,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4f2a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:40:17, skipping insertion in model container [2022-11-16 11:40:17,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:40:14" (2/3) ... [2022-11-16 11:40:17,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e4f2a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:40:17, skipping insertion in model container [2022-11-16 11:40:17,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:40:17" (3/3) ... [2022-11-16 11:40:17,188 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test12-2.i [2022-11-16 11:40:17,208 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:40:17,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2022-11-16 11:40:17,289 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:40:17,297 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;@1cc807f0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:40:17,297 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2022-11-16 11:40:17,303 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) [2022-11-16 11:40:17,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:40:17,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:17,313 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:17,314 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)] === [2022-11-16 11:40:17,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:17,319 INFO L85 PathProgramCache]: Analyzing trace with hash -297378988, now seen corresponding path program 1 times [2022-11-16 11:40:17,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:17,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1931250716] [2022-11-16 11:40:17,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:17,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:17,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:17,336 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:17,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-16 11:40:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:17,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:40:17,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:17,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:17,669 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:17,669 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:17,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1931250716] [2022-11-16 11:40:17,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1931250716] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:17,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:17,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:40:17,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794901995] [2022-11-16 11:40:17,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:17,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:40:17,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:17,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:40:17,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:40:17,730 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) [2022-11-16 11:40:19,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:19,200 INFO L93 Difference]: Finished difference Result 412 states and 459 transitions. [2022-11-16 11:40:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:40:19,205 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 [2022-11-16 11:40:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:19,224 INFO L225 Difference]: With dead ends: 412 [2022-11-16 11:40:19,224 INFO L226 Difference]: Without dead ends: 408 [2022-11-16 11:40:19,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:19,234 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 299 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:19,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 506 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:40:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-16 11:40:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 344. [2022-11-16 11:40:19,333 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) [2022-11-16 11:40:19,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 402 transitions. [2022-11-16 11:40:19,336 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 402 transitions. Word has length 11 [2022-11-16 11:40:19,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:19,337 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 402 transitions. [2022-11-16 11:40:19,337 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) [2022-11-16 11:40:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 402 transitions. [2022-11-16 11:40:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:40:19,344 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:19,345 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:19,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:19,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:19,547 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)] === [2022-11-16 11:40:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash -297378987, now seen corresponding path program 1 times [2022-11-16 11:40:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:19,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084961886] [2022-11-16 11:40:19,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:19,549 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:19,551 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:19,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-16 11:40:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:40:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:19,843 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:19,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:19,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084961886] [2022-11-16 11:40:19,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084961886] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:19,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:19,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:40:19,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977968331] [2022-11-16 11:40:19,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:19,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:40:19,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:19,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:40:19,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:40:19,847 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) [2022-11-16 11:40:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:21,234 INFO L93 Difference]: Finished difference Result 476 states and 564 transitions. [2022-11-16 11:40:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:40:21,236 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 [2022-11-16 11:40:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:21,239 INFO L225 Difference]: With dead ends: 476 [2022-11-16 11:40:21,239 INFO L226 Difference]: Without dead ends: 476 [2022-11-16 11:40:21,240 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 [2022-11-16 11:40:21,241 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 131 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:21,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 832 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:40:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-16 11:40:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 407. [2022-11-16 11:40:21,259 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) [2022-11-16 11:40:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 520 transitions. [2022-11-16 11:40:21,266 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 520 transitions. Word has length 11 [2022-11-16 11:40:21,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:21,267 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 520 transitions. [2022-11-16 11:40:21,267 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) [2022-11-16 11:40:21,268 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 520 transitions. [2022-11-16 11:40:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 11:40:21,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:21,270 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:21,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:21,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:21,484 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)] === [2022-11-16 11:40:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:21,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1184882668, now seen corresponding path program 1 times [2022-11-16 11:40:21,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:21,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506328591] [2022-11-16 11:40:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:21,486 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:21,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:21,496 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:21,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-16 11:40:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:21,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:40:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:21,652 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:21,652 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:21,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506328591] [2022-11-16 11:40:21,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506328591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:21,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:21,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:40:21,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736946271] [2022-11-16 11:40:21,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:21,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:40:21,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:21,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:40:21,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:21,657 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) [2022-11-16 11:40:21,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:21,923 INFO L93 Difference]: Finished difference Result 649 states and 797 transitions. [2022-11-16 11:40:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:40:21,924 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 [2022-11-16 11:40:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:21,932 INFO L225 Difference]: With dead ends: 649 [2022-11-16 11:40:21,932 INFO L226 Difference]: Without dead ends: 649 [2022-11-16 11:40:21,933 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 [2022-11-16 11:40:21,940 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 [2022-11-16 11:40:21,944 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] [2022-11-16 11:40:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-11-16 11:40:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 392. [2022-11-16 11:40:21,974 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) [2022-11-16 11:40:21,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 494 transitions. [2022-11-16 11:40:21,981 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 494 transitions. Word has length 11 [2022-11-16 11:40:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:21,982 INFO L495 AbstractCegarLoop]: Abstraction has 392 states and 494 transitions. [2022-11-16 11:40:21,982 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) [2022-11-16 11:40:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 494 transitions. [2022-11-16 11:40:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:40:21,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:21,984 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:22,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2022-11-16 11:40:22,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:22,196 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)] === [2022-11-16 11:40:22,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:22,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613461, now seen corresponding path program 1 times [2022-11-16 11:40:22,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:22,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1477851275] [2022-11-16 11:40:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:22,198 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:22,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:22,200 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:22,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-16 11:40:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:22,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:40:22,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:22,536 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:22,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:22,576 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:22,576 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:22,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1477851275] [2022-11-16 11:40:22,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1477851275] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:22,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:22,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:40:22,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437097819] [2022-11-16 11:40:22,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:22,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:40:22,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:22,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:40:22,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:40:22,579 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) [2022-11-16 11:40:24,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:24,010 INFO L93 Difference]: Finished difference Result 436 states and 541 transitions. [2022-11-16 11:40:24,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:40:24,012 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 [2022-11-16 11:40:24,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:24,014 INFO L225 Difference]: With dead ends: 436 [2022-11-16 11:40:24,014 INFO L226 Difference]: Without dead ends: 436 [2022-11-16 11:40:24,015 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 [2022-11-16 11:40:24,015 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 61 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 1152 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:24,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 1152 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:40:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-16 11:40:24,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 404. [2022-11-16 11:40:24,034 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) [2022-11-16 11:40:24,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 506 transitions. [2022-11-16 11:40:24,039 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 506 transitions. Word has length 13 [2022-11-16 11:40:24,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:24,043 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 506 transitions. [2022-11-16 11:40:24,043 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) [2022-11-16 11:40:24,043 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 506 transitions. [2022-11-16 11:40:24,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 11:40:24,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:24,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:24,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:24,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:24,257 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)] === [2022-11-16 11:40:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:24,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1981613462, now seen corresponding path program 1 times [2022-11-16 11:40:24,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:24,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843298248] [2022-11-16 11:40:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:24,258 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:24,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:24,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:24,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-16 11:40:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:24,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:40:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:24,610 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:24,624 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:24,676 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:24,676 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:24,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843298248] [2022-11-16 11:40:24,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843298248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:24,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:24,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:40:24,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418841534] [2022-11-16 11:40:24,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:24,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:40:24,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:40:24,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:40:24,678 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) [2022-11-16 11:40:26,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:26,450 INFO L93 Difference]: Finished difference Result 424 states and 522 transitions. [2022-11-16 11:40:26,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:40:26,451 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 [2022-11-16 11:40:26,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:26,453 INFO L225 Difference]: With dead ends: 424 [2022-11-16 11:40:26,454 INFO L226 Difference]: Without dead ends: 424 [2022-11-16 11:40:26,454 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 [2022-11-16 11:40:26,455 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 34 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1291 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:26,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1291 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-16 11:40:26,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-11-16 11:40:26,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 413. [2022-11-16 11:40:26,467 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) [2022-11-16 11:40:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 519 transitions. [2022-11-16 11:40:26,469 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 519 transitions. Word has length 13 [2022-11-16 11:40:26,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:26,470 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 519 transitions. [2022-11-16 11:40:26,470 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) [2022-11-16 11:40:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 519 transitions. [2022-11-16 11:40:26,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:40:26,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:26,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:26,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:26,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:26,684 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)] === [2022-11-16 11:40:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:26,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1895308392, now seen corresponding path program 1 times [2022-11-16 11:40:26,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:26,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1953631487] [2022-11-16 11:40:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:26,685 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:26,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:26,686 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:26,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-16 11:40:26,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:26,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:40:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:26,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:26,856 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:26,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1953631487] [2022-11-16 11:40:26,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1953631487] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:26,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:26,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:40:26,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656177202] [2022-11-16 11:40:26,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:26,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:40:26,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:26,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:40:26,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:26,859 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) [2022-11-16 11:40:26,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:26,961 INFO L93 Difference]: Finished difference Result 351 states and 397 transitions. [2022-11-16 11:40:26,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:40:26,963 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 [2022-11-16 11:40:26,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:26,967 INFO L225 Difference]: With dead ends: 351 [2022-11-16 11:40:26,968 INFO L226 Difference]: Without dead ends: 351 [2022-11-16 11:40:26,968 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 [2022-11-16 11:40:26,969 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 [2022-11-16 11:40:26,969 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] [2022-11-16 11:40:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-16 11:40:26,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 345. [2022-11-16 11:40:26,979 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) [2022-11-16 11:40:26,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 387 transitions. [2022-11-16 11:40:26,981 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 387 transitions. Word has length 17 [2022-11-16 11:40:26,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:26,981 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 387 transitions. [2022-11-16 11:40:26,982 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) [2022-11-16 11:40:26,982 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 387 transitions. [2022-11-16 11:40:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:40:26,983 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:26,983 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:27,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:27,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:27,199 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)] === [2022-11-16 11:40:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -2106255897, now seen corresponding path program 1 times [2022-11-16 11:40:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [281530176] [2022-11-16 11:40:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:27,202 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:27,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-16 11:40:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:27,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:40:27,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:27,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:27,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:27,371 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:27,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [281530176] [2022-11-16 11:40:27,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [281530176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:27,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:27,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-16 11:40:27,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090156124] [2022-11-16 11:40:27,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:27,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:40:27,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:27,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:40:27,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:27,374 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) [2022-11-16 11:40:27,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:27,489 INFO L93 Difference]: Finished difference Result 344 states and 386 transitions. [2022-11-16 11:40:27,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:40:27,490 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 [2022-11-16 11:40:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:27,492 INFO L225 Difference]: With dead ends: 344 [2022-11-16 11:40:27,492 INFO L226 Difference]: Without dead ends: 344 [2022-11-16 11:40:27,492 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 [2022-11-16 11:40:27,493 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 [2022-11-16 11:40:27,493 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] [2022-11-16 11:40:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-11-16 11:40:27,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-11-16 11:40:27,502 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) [2022-11-16 11:40:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 386 transitions. [2022-11-16 11:40:27,504 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 386 transitions. Word has length 17 [2022-11-16 11:40:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:27,505 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 386 transitions. [2022-11-16 11:40:27,505 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) [2022-11-16 11:40:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 386 transitions. [2022-11-16 11:40:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:40:27,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:27,506 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:27,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:27,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:27,718 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)] === [2022-11-16 11:40:27,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:27,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2106256148, now seen corresponding path program 1 times [2022-11-16 11:40:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:27,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142912816] [2022-11-16 11:40:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:27,720 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:27,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:27,721 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:27,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-16 11:40:27,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:40:27,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:27,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:27,873 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:27,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:27,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142912816] [2022-11-16 11:40:27,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142912816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:27,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:27,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:40:27,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162626476] [2022-11-16 11:40:27,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:27,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:40:27,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:40:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:40:27,876 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) [2022-11-16 11:40:27,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:27,962 INFO L93 Difference]: Finished difference Result 388 states and 436 transitions. [2022-11-16 11:40:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:40:27,965 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 [2022-11-16 11:40:27,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:27,970 INFO L225 Difference]: With dead ends: 388 [2022-11-16 11:40:27,970 INFO L226 Difference]: Without dead ends: 388 [2022-11-16 11:40:27,970 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 [2022-11-16 11:40:27,971 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 [2022-11-16 11:40:27,971 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] [2022-11-16 11:40:27,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-16 11:40:27,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 346. [2022-11-16 11:40:27,980 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) [2022-11-16 11:40:27,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 388 transitions. [2022-11-16 11:40:27,982 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 388 transitions. Word has length 17 [2022-11-16 11:40:27,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:27,983 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 388 transitions. [2022-11-16 11:40:27,983 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) [2022-11-16 11:40:27,983 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 388 transitions. [2022-11-16 11:40:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:40:27,988 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:27,988 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:28,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:28,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:28,212 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)] === [2022-11-16 11:40:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:28,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885299, now seen corresponding path program 1 times [2022-11-16 11:40:28,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:28,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1417032744] [2022-11-16 11:40:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:28,213 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:28,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:28,215 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:28,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-16 11:40:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:28,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:40:28,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:28,331 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:28,398 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_12 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_12) |c_#valid|)))) is different from true [2022-11-16 11:40:28,487 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:40:28,487 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 11:40:28,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:28,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:28,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:28,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1417032744] [2022-11-16 11:40:28,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1417032744] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:28,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:28,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-16 11:40:28,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381465202] [2022-11-16 11:40:28,764 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:28,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:40:28,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:28,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:40:28,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2022-11-16 11:40:28,765 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) [2022-11-16 11:40:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:29,592 INFO L93 Difference]: Finished difference Result 353 states and 399 transitions. [2022-11-16 11:40:29,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:40:29,594 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 [2022-11-16 11:40:29,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:29,595 INFO L225 Difference]: With dead ends: 353 [2022-11-16 11:40:29,595 INFO L226 Difference]: Without dead ends: 353 [2022-11-16 11:40:29,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2022-11-16 11:40:29,596 INFO L413 NwaCegarLoop]: 341 mSDtfsCounter, 20 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:29,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 1180 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 521 Unchecked, 0.8s Time] [2022-11-16 11:40:29,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-16 11:40:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2022-11-16 11:40:29,610 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) [2022-11-16 11:40:29,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 392 transitions. [2022-11-16 11:40:29,613 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 392 transitions. Word has length 17 [2022-11-16 11:40:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:29,613 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 392 transitions. [2022-11-16 11:40:29,613 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) [2022-11-16 11:40:29,614 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 392 transitions. [2022-11-16 11:40:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 11:40:29,614 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:29,614 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:29,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:29,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:29,827 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)] === [2022-11-16 11:40:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:29,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2134885298, now seen corresponding path program 1 times [2022-11-16 11:40:29,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:29,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224453707] [2022-11-16 11:40:29,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:29,828 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:29,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:29,832 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:29,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-16 11:40:29,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:29,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:40:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:29,955 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:29,962 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:30,135 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_23 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_23))))) is different from true [2022-11-16 11:40:30,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:30,176 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:30,188 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:40:30,189 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 11:40:30,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:30,616 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:30,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224453707] [2022-11-16 11:40:30,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224453707] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:30,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [934564029] [2022-11-16 11:40:30,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:30,616 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:40:30,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:40:30,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:40:30,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2022-11-16 11:40:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:30,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:40:30,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:30,824 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:30,832 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:30,929 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_33 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_33) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-16 11:40:30,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:30,967 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:30,982 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:40:30,982 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-16 11:40:31,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:31,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [934564029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:31,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:31,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-16 11:40:31,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887375607] [2022-11-16 11:40:31,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:31,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:40:31,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:40:31,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=71, Unknown=2, NotChecked=34, Total=132 [2022-11-16 11:40:31,932 INFO L87 Difference]: Start difference. First operand 350 states and 392 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:40:35,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:35,743 INFO L93 Difference]: Finished difference Result 634 states and 720 transitions. [2022-11-16 11:40:35,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:40:35,744 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 17 [2022-11-16 11:40:35,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:35,747 INFO L225 Difference]: With dead ends: 634 [2022-11-16 11:40:35,747 INFO L226 Difference]: Without dead ends: 634 [2022-11-16 11:40:35,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=33, Invalid=105, Unknown=2, NotChecked=42, Total=182 [2022-11-16 11:40:35,748 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 335 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 2786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1327 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:35,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1078 Invalid, 2786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1415 Invalid, 0 Unknown, 1327 Unchecked, 3.6s Time] [2022-11-16 11:40:35,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-11-16 11:40:35,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 364. [2022-11-16 11:40:35,761 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) [2022-11-16 11:40:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 420 transitions. [2022-11-16 11:40:35,763 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 420 transitions. Word has length 17 [2022-11-16 11:40:35,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:35,763 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 420 transitions. [2022-11-16 11:40:35,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-16 11:40:35,763 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 420 transitions. [2022-11-16 11:40:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:40:35,764 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:35,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:35,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:35,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:36,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:36,168 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)] === [2022-11-16 11:40:36,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:36,168 INFO L85 PathProgramCache]: Analyzing trace with hash -869422937, now seen corresponding path program 1 times [2022-11-16 11:40:36,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:36,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [761378418] [2022-11-16 11:40:36,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:36,169 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:36,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:36,170 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:36,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-16 11:40:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:40:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:36,622 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:36,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [761378418] [2022-11-16 11:40:36,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [761378418] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:40:36,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:36,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:40:36,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707772404] [2022-11-16 11:40:36,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:36,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:40:36,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:36,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:40:36,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:40:36,624 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) [2022-11-16 11:40:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:37,302 INFO L93 Difference]: Finished difference Result 367 states and 421 transitions. [2022-11-16 11:40:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:40:37,303 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 [2022-11-16 11:40:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:37,305 INFO L225 Difference]: With dead ends: 367 [2022-11-16 11:40:37,305 INFO L226 Difference]: Without dead ends: 367 [2022-11-16 11:40:37,305 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 [2022-11-16 11:40:37,306 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 581 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1331 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:37,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1331 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 318 Invalid, 0 Unknown, 27 Unchecked, 0.6s Time] [2022-11-16 11:40:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-11-16 11:40:37,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 363. [2022-11-16 11:40:37,315 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) [2022-11-16 11:40:37,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 418 transitions. [2022-11-16 11:40:37,317 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 418 transitions. Word has length 18 [2022-11-16 11:40:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:37,318 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 418 transitions. [2022-11-16 11:40:37,318 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) [2022-11-16 11:40:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 418 transitions. [2022-11-16 11:40:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 11:40:37,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:37,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:37,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:37,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:37,531 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)] === [2022-11-16 11:40:37,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:37,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1883109288, now seen corresponding path program 1 times [2022-11-16 11:40:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1722772446] [2022-11-16 11:40:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:37,532 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:37,533 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:37,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-16 11:40:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:37,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:40:37,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:37,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:37,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:40:37,679 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:37,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1722772446] [2022-11-16 11:40:37,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1722772446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:40:37,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:40:37,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:40:37,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93413751] [2022-11-16 11:40:37,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:40:37,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:40:37,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:40:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:40:37,681 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) [2022-11-16 11:40:38,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:38,525 INFO L93 Difference]: Finished difference Result 366 states and 420 transitions. [2022-11-16 11:40:38,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:40:38,526 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 [2022-11-16 11:40:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:38,528 INFO L225 Difference]: With dead ends: 366 [2022-11-16 11:40:38,528 INFO L226 Difference]: Without dead ends: 353 [2022-11-16 11:40:38,528 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 [2022-11-16 11:40:38,532 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 41 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:38,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 663 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:40:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-11-16 11:40:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-11-16 11:40:38,541 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) [2022-11-16 11:40:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 407 transitions. [2022-11-16 11:40:38,543 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 407 transitions. Word has length 18 [2022-11-16 11:40:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:38,544 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 407 transitions. [2022-11-16 11:40:38,544 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) [2022-11-16 11:40:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 407 transitions. [2022-11-16 11:40:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:38,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:38,545 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:38,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:38,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:38,760 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)] === [2022-11-16 11:40:38,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:38,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475052, now seen corresponding path program 1 times [2022-11-16 11:40:38,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:38,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [982559499] [2022-11-16 11:40:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:38,760 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:38,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:38,761 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:38,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-16 11:40:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:38,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:40:38,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:38,998 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:40:38,998 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:39,162 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:39,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:39,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [982559499] [2022-11-16 11:40:39,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [982559499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:39,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1438291348] [2022-11-16 11:40:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:39,268 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:40:39,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:40:39,271 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:40:39,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2022-11-16 11:40:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:39,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:40:39,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:39,453 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:39,528 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:40:39,528 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:39,641 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:40:39,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:39,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1438291348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:39,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:39,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-16 11:40:39,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536001784] [2022-11-16 11:40:39,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:39,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:40:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:40:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-16 11:40:39,719 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) [2022-11-16 11:40:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:40:40,941 INFO L93 Difference]: Finished difference Result 403 states and 459 transitions. [2022-11-16 11:40:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:40:40,943 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 [2022-11-16 11:40:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:40:40,945 INFO L225 Difference]: With dead ends: 403 [2022-11-16 11:40:40,945 INFO L226 Difference]: Without dead ends: 403 [2022-11-16 11:40:40,945 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 [2022-11-16 11:40:40,946 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 68 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1312 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:40:40,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 1312 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 562 Invalid, 0 Unknown, 179 Unchecked, 1.2s Time] [2022-11-16 11:40:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-16 11:40:40,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 358. [2022-11-16 11:40:40,956 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) [2022-11-16 11:40:40,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 413 transitions. [2022-11-16 11:40:40,959 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 413 transitions. Word has length 21 [2022-11-16 11:40:40,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:40:40,959 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 413 transitions. [2022-11-16 11:40:40,959 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) [2022-11-16 11:40:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 413 transitions. [2022-11-16 11:40:40,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:40:40,960 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:40:40,961 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:40:40,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2022-11-16 11:40:41,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-16 11:40:41,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:41,364 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)] === [2022-11-16 11:40:41,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:40:41,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1969475053, now seen corresponding path program 1 times [2022-11-16 11:40:41,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:40:41,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627620906] [2022-11-16 11:40:41,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:41,365 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:40:41,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:40:41,366 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:40:41,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-16 11:40:41,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:41,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:40:41,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:43,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:43,636 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:45,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:48,411 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:40:48,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627620906] [2022-11-16 11:40:48,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627620906] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:48,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2000698173] [2022-11-16 11:40:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:40:48,416 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:40:48,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:40:48,417 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:40:48,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2022-11-16 11:40:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:40:48,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:40:48,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:40:48,596 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:50,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:40:50,717 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:40:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:40:50,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:40:55,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2000698173] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:40:55,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:40:55,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2022-11-16 11:40:55,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056223445] [2022-11-16 11:40:55,313 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:40:55,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:40:55,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:40:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:40:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=60, Unknown=3, NotChecked=0, Total=90 [2022-11-16 11:40:55,315 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) [2022-11-16 11:41:01,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:01,516 INFO L93 Difference]: Finished difference Result 449 states and 506 transitions. [2022-11-16 11:41:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:41:01,517 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 [2022-11-16 11:41:01,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:01,520 INFO L225 Difference]: With dead ends: 449 [2022-11-16 11:41:01,520 INFO L226 Difference]: Without dead ends: 449 [2022-11-16 11:41:01,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=60, Invalid=117, Unknown=5, NotChecked=0, Total=182 [2022-11-16 11:41:01,521 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 132 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 711 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 943 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:01,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1202 Invalid, 943 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 711 Invalid, 0 Unknown, 223 Unchecked, 2.0s Time] [2022-11-16 11:41:01,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-16 11:41:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 384. [2022-11-16 11:41:01,532 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) [2022-11-16 11:41:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 460 transitions. [2022-11-16 11:41:01,535 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 460 transitions. Word has length 21 [2022-11-16 11:41:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:01,535 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 460 transitions. [2022-11-16 11:41:01,536 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) [2022-11-16 11:41:01,536 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 460 transitions. [2022-11-16 11:41:01,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-16 11:41:01,536 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:01,537 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:01,547 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2022-11-16 11:41:01,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:01,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:01,940 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)] === [2022-11-16 11:41:01,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:01,940 INFO L85 PathProgramCache]: Analyzing trace with hash -2128978739, now seen corresponding path program 1 times [2022-11-16 11:41:01,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:01,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [427368250] [2022-11-16 11:41:01,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:01,941 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:01,943 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:01,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-16 11:41:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:02,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:41:02,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:41:02,073 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:02,073 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:02,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [427368250] [2022-11-16 11:41:02,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [427368250] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:02,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:02,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847959727] [2022-11-16 11:41:02,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:02,076 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) [2022-11-16 11:41:02,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:02,194 INFO L93 Difference]: Finished difference Result 397 states and 459 transitions. [2022-11-16 11:41:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:02,194 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 [2022-11-16 11:41:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:02,196 INFO L225 Difference]: With dead ends: 397 [2022-11-16 11:41:02,196 INFO L226 Difference]: Without dead ends: 397 [2022-11-16 11:41:02,196 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 [2022-11-16 11:41:02,197 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 [2022-11-16 11:41:02,197 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] [2022-11-16 11:41:02,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-11-16 11:41:02,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 381. [2022-11-16 11:41:02,208 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) [2022-11-16 11:41:02,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 456 transitions. [2022-11-16 11:41:02,210 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 456 transitions. Word has length 21 [2022-11-16 11:41:02,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:02,210 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 456 transitions. [2022-11-16 11:41:02,211 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) [2022-11-16 11:41:02,211 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 456 transitions. [2022-11-16 11:41:02,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:41:02,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:02,212 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] [2022-11-16 11:41:02,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:02,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:02,424 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)] === [2022-11-16 11:41:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040467, now seen corresponding path program 1 times [2022-11-16 11:41:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:02,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [473694798] [2022-11-16 11:41:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:02,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:02,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:02,426 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:02,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-16 11:41:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:02,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:41:02,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:02,617 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:41:02,646 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:02,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [473694798] [2022-11-16 11:41:02,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [473694798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:02,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:02,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:41:02,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207867893] [2022-11-16 11:41:02,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:02,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:02,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:02,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:02,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:02,648 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) [2022-11-16 11:41:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:03,683 INFO L93 Difference]: Finished difference Result 422 states and 500 transitions. [2022-11-16 11:41:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:03,684 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 [2022-11-16 11:41:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:03,687 INFO L225 Difference]: With dead ends: 422 [2022-11-16 11:41:03,687 INFO L226 Difference]: Without dead ends: 422 [2022-11-16 11:41:03,687 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 [2022-11-16 11:41:03,688 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 59 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:03,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1033 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:41:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-16 11:41:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 381. [2022-11-16 11:41:03,700 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) [2022-11-16 11:41:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 455 transitions. [2022-11-16 11:41:03,703 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 455 transitions. Word has length 23 [2022-11-16 11:41:03,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:03,703 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 455 transitions. [2022-11-16 11:41:03,703 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) [2022-11-16 11:41:03,703 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 455 transitions. [2022-11-16 11:41:03,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 11:41:03,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:03,704 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] [2022-11-16 11:41:03,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:03,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:03,917 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)] === [2022-11-16 11:41:03,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1415040466, now seen corresponding path program 1 times [2022-11-16 11:41:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:03,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1561295469] [2022-11-16 11:41:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:03,918 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:03,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:03,920 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:03,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-16 11:41:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:04,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:41:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:04,315 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:04,326 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:41:04,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:04,375 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:04,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1561295469] [2022-11-16 11:41:04,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1561295469] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:04,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:04,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:41:04,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435774564] [2022-11-16 11:41:04,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:04,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:04,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:04,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:04,377 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) [2022-11-16 11:41:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:05,585 INFO L93 Difference]: Finished difference Result 403 states and 477 transitions. [2022-11-16 11:41:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:05,586 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 [2022-11-16 11:41:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:05,588 INFO L225 Difference]: With dead ends: 403 [2022-11-16 11:41:05,588 INFO L226 Difference]: Without dead ends: 403 [2022-11-16 11:41:05,588 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 [2022-11-16 11:41:05,589 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 41 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:05,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1084 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-16 11:41:05,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-16 11:41:05,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 381. [2022-11-16 11:41:05,600 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) [2022-11-16 11:41:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 454 transitions. [2022-11-16 11:41:05,602 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 454 transitions. Word has length 23 [2022-11-16 11:41:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:05,602 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 454 transitions. [2022-11-16 11:41:05,602 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) [2022-11-16 11:41:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 454 transitions. [2022-11-16 11:41:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:41:05,603 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:05,603 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] [2022-11-16 11:41:05,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:05,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:05,815 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)] === [2022-11-16 11:41:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:05,816 INFO L85 PathProgramCache]: Analyzing trace with hash -412937067, now seen corresponding path program 1 times [2022-11-16 11:41:05,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:05,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075683435] [2022-11-16 11:41:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:05,817 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:05,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:05,818 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:05,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-16 11:41:05,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:05,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:41:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:05,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:06,041 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:06,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075683435] [2022-11-16 11:41:06,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075683435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:06,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:06,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-16 11:41:06,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504444063] [2022-11-16 11:41:06,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:06,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:06,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:06,043 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) [2022-11-16 11:41:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:06,141 INFO L93 Difference]: Finished difference Result 380 states and 453 transitions. [2022-11-16 11:41:06,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:06,142 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 [2022-11-16 11:41:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:06,144 INFO L225 Difference]: With dead ends: 380 [2022-11-16 11:41:06,144 INFO L226 Difference]: Without dead ends: 380 [2022-11-16 11:41:06,144 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 [2022-11-16 11:41:06,145 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 [2022-11-16 11:41:06,145 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] [2022-11-16 11:41:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-11-16 11:41:06,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-11-16 11:41:06,155 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) [2022-11-16 11:41:06,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 453 transitions. [2022-11-16 11:41:06,157 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 453 transitions. Word has length 25 [2022-11-16 11:41:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:06,160 INFO L495 AbstractCegarLoop]: Abstraction has 380 states and 453 transitions. [2022-11-16 11:41:06,160 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) [2022-11-16 11:41:06,161 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 453 transitions. [2022-11-16 11:41:06,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:41:06,164 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:06,164 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] [2022-11-16 11:41:06,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:06,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:06,378 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)] === [2022-11-16 11:41:06,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:06,378 INFO L85 PathProgramCache]: Analyzing trace with hash -412937301, now seen corresponding path program 1 times [2022-11-16 11:41:06,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:06,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713200998] [2022-11-16 11:41:06,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:06,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:06,380 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:06,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-16 11:41:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:06,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:41:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:06,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:06,541 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:06,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [713200998] [2022-11-16 11:41:06,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [713200998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:06,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:06,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:06,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145100535] [2022-11-16 11:41:06,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:06,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:06,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:06,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:06,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:06,543 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) [2022-11-16 11:41:06,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:06,609 INFO L93 Difference]: Finished difference Result 415 states and 481 transitions. [2022-11-16 11:41:06,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:06,610 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 [2022-11-16 11:41:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:06,612 INFO L225 Difference]: With dead ends: 415 [2022-11-16 11:41:06,613 INFO L226 Difference]: Without dead ends: 415 [2022-11-16 11:41:06,613 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 [2022-11-16 11:41:06,614 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 44 mSDsluCounter, 1065 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2022-11-16 11:41:06,614 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] [2022-11-16 11:41:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-16 11:41:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 371. [2022-11-16 11:41:06,623 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) [2022-11-16 11:41:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 435 transitions. [2022-11-16 11:41:06,625 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 435 transitions. Word has length 25 [2022-11-16 11:41:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:06,626 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 435 transitions. [2022-11-16 11:41:06,626 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) [2022-11-16 11:41:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 435 transitions. [2022-11-16 11:41:06,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:41:06,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:06,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:06,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:06,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:06,838 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)] === [2022-11-16 11:41:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:06,839 INFO L85 PathProgramCache]: Analyzing trace with hash -441566452, now seen corresponding path program 1 times [2022-11-16 11:41:06,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:06,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866915815] [2022-11-16 11:41:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:06,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:06,841 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:06,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-16 11:41:06,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:06,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 11:41:06,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:06,969 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:07,040 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-16 11:41:07,066 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:41:07,067 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:07,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2022-11-16 11:41:07,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:41:07,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:07,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866915815] [2022-11-16 11:41:07,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866915815] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:07,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:07,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2022-11-16 11:41:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170757873] [2022-11-16 11:41:07,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:07,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:41:07,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:07,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:41:07,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=31, Unknown=1, NotChecked=10, Total=56 [2022-11-16 11:41:07,309 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) [2022-11-16 11:41:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:09,418 INFO L93 Difference]: Finished difference Result 515 states and 605 transitions. [2022-11-16 11:41:09,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:41:09,419 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 [2022-11-16 11:41:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:09,422 INFO L225 Difference]: With dead ends: 515 [2022-11-16 11:41:09,422 INFO L226 Difference]: Without dead ends: 515 [2022-11-16 11:41:09,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=41, Unknown=1, NotChecked=12, Total=72 [2022-11-16 11:41:09,423 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 182 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 520 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:09,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 1093 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 743 Invalid, 0 Unknown, 520 Unchecked, 2.0s Time] [2022-11-16 11:41:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-11-16 11:41:09,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 373. [2022-11-16 11:41:09,434 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) [2022-11-16 11:41:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 438 transitions. [2022-11-16 11:41:09,436 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 438 transitions. Word has length 25 [2022-11-16 11:41:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:09,437 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 438 transitions. [2022-11-16 11:41:09,437 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) [2022-11-16 11:41:09,437 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 438 transitions. [2022-11-16 11:41:09,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-16 11:41:09,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:09,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:41:09,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2022-11-16 11:41:09,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:09,650 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)] === [2022-11-16 11:41:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash -441566451, now seen corresponding path program 1 times [2022-11-16 11:41:09,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:09,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1595031523] [2022-11-16 11:41:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:09,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:09,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:09,653 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:09,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-16 11:41:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:09,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-16 11:41:09,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:09,813 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:09,988 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-11-16 11:41:10,022 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:41:10,022 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-16 11:41:10,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:10,433 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1595031523] [2022-11-16 11:41:10,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1595031523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:10,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1846389445] [2022-11-16 11:41:10,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:10,433 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:10,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:41:10,435 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:41:10,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2022-11-16 11:41:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:10,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:41:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:10,670 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:10,682 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:10,938 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_139 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_139))))) is different from true [2022-11-16 11:41:10,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:10,964 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:10,981 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:10,981 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2022-11-16 11:41:11,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:11,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1846389445] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:11,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:11,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-11-16 11:41:11,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367294055] [2022-11-16 11:41:11,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:11,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:41:11,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:11,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:41:11,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=173, Unknown=2, NotChecked=54, Total=272 [2022-11-16 11:41:11,680 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) [2022-11-16 11:41:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:16,472 INFO L93 Difference]: Finished difference Result 645 states and 746 transitions. [2022-11-16 11:41:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:41:16,473 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 [2022-11-16 11:41:16,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:16,477 INFO L225 Difference]: With dead ends: 645 [2022-11-16 11:41:16,478 INFO L226 Difference]: Without dead ends: 645 [2022-11-16 11:41:16,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=54, Invalid=224, Unknown=2, NotChecked=62, Total=342 [2022-11-16 11:41:16,479 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 335 mSDsluCounter, 1558 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 3005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1208 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:16,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1879 Invalid, 3005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1768 Invalid, 0 Unknown, 1208 Unchecked, 4.6s Time] [2022-11-16 11:41:16,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-16 11:41:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 372. [2022-11-16 11:41:16,491 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) [2022-11-16 11:41:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 437 transitions. [2022-11-16 11:41:16,493 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 437 transitions. Word has length 25 [2022-11-16 11:41:16,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:16,493 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 437 transitions. [2022-11-16 11:41:16,493 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) [2022-11-16 11:41:16,494 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 437 transitions. [2022-11-16 11:41:16,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:41:16,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:16,494 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] [2022-11-16 11:41:16,512 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:16,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:16,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:16,908 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)] === [2022-11-16 11:41:16,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:16,908 INFO L85 PathProgramCache]: Analyzing trace with hash 83853234, now seen corresponding path program 1 times [2022-11-16 11:41:16,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:16,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548003601] [2022-11-16 11:41:16,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:16,909 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:16,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:16,910 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:16,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-16 11:41:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:17,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:41:17,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:17,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:41:17,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:17,612 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:17,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548003601] [2022-11-16 11:41:17,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548003601] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:17,613 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:17,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:41:17,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126398308] [2022-11-16 11:41:17,613 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:17,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:41:17,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:41:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:41:17,614 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) [2022-11-16 11:41:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:18,044 INFO L93 Difference]: Finished difference Result 606 states and 700 transitions. [2022-11-16 11:41:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:41:18,047 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 [2022-11-16 11:41:18,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:18,050 INFO L225 Difference]: With dead ends: 606 [2022-11-16 11:41:18,050 INFO L226 Difference]: Without dead ends: 606 [2022-11-16 11:41:18,050 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 [2022-11-16 11:41:18,051 INFO L413 NwaCegarLoop]: 346 mSDtfsCounter, 321 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 2021 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:18,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 2021 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 150 Unchecked, 0.4s Time] [2022-11-16 11:41:18,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-16 11:41:18,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 473. [2022-11-16 11:41:18,071 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) [2022-11-16 11:41:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 623 transitions. [2022-11-16 11:41:18,076 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 623 transitions. Word has length 26 [2022-11-16 11:41:18,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:18,077 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 623 transitions. [2022-11-16 11:41:18,077 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) [2022-11-16 11:41:18,077 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 623 transitions. [2022-11-16 11:41:18,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-16 11:41:18,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:18,078 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] [2022-11-16 11:41:18,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:18,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:18,292 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)] === [2022-11-16 11:41:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:18,293 INFO L85 PathProgramCache]: Analyzing trace with hash -366162574, now seen corresponding path program 1 times [2022-11-16 11:41:18,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:18,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292408916] [2022-11-16 11:41:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:18,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:18,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:18,295 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:18,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-16 11:41:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 11:41:18,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:18,781 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:18,791 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:41:18,895 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:18,895 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:18,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292408916] [2022-11-16 11:41:18,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292408916] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:18,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:18,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:41:18,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330228417] [2022-11-16 11:41:18,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:18,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:18,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:18,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:18,897 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) [2022-11-16 11:41:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:19,497 INFO L93 Difference]: Finished difference Result 455 states and 584 transitions. [2022-11-16 11:41:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:19,498 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 [2022-11-16 11:41:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:19,502 INFO L225 Difference]: With dead ends: 455 [2022-11-16 11:41:19,502 INFO L226 Difference]: Without dead ends: 455 [2022-11-16 11:41:19,503 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 [2022-11-16 11:41:19,503 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 13 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:19,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 1249 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:41:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-16 11:41:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 451. [2022-11-16 11:41:19,515 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) [2022-11-16 11:41:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 581 transitions. [2022-11-16 11:41:19,517 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 581 transitions. Word has length 26 [2022-11-16 11:41:19,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:19,518 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 581 transitions. [2022-11-16 11:41:19,518 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) [2022-11-16 11:41:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 581 transitions. [2022-11-16 11:41:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-16 11:41:19,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:19,519 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] [2022-11-16 11:41:19,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:19,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:19,731 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)] === [2022-11-16 11:41:19,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:19,731 INFO L85 PathProgramCache]: Analyzing trace with hash 305064464, now seen corresponding path program 1 times [2022-11-16 11:41:19,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:19,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [578485330] [2022-11-16 11:41:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:19,732 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:19,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:19,733 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:19,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-16 11:41:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:41:19,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:20,034 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-11-16 11:41:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:41:20,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:20,296 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_29| (_ BitVec 32))) (or (= (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_29| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_29|) (_ bv0 1))))) is different from false [2022-11-16 11:41:20,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:20,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [578485330] [2022-11-16 11:41:20,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [578485330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2088840205] [2022-11-16 11:41:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:20,303 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:41:20,304 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:41:20,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2022-11-16 11:41:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:20,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 11:41:20,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:41:20,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:21,036 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret65#1.base_32| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_32|) (_ bv0 1))) (= |c_ULTIMATE.start_main_old_#valid#1| (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret65#1.base_32| (_ bv0 1))))) is different from false [2022-11-16 11:41:21,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2088840205] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:21,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:21,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2022-11-16 11:41:21,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669811427] [2022-11-16 11:41:21,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:41:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:41:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=126, Unknown=3, NotChecked=72, Total=240 [2022-11-16 11:41:21,042 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) [2022-11-16 11:41:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:22,724 INFO L93 Difference]: Finished difference Result 454 states and 583 transitions. [2022-11-16 11:41:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:41:22,725 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 [2022-11-16 11:41:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:22,728 INFO L225 Difference]: With dead ends: 454 [2022-11-16 11:41:22,728 INFO L226 Difference]: Without dead ends: 438 [2022-11-16 11:41:22,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=172, Unknown=3, NotChecked=84, Total=306 [2022-11-16 11:41:22,729 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 60 mSDsluCounter, 1265 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1566 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 850 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:22,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 1566 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 579 Invalid, 0 Unknown, 850 Unchecked, 1.6s Time] [2022-11-16 11:41:22,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-16 11:41:22,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-11-16 11:41:22,739 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) [2022-11-16 11:41:22,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 567 transitions. [2022-11-16 11:41:22,742 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 567 transitions. Word has length 28 [2022-11-16 11:41:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:22,742 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 567 transitions. [2022-11-16 11:41:22,742 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) [2022-11-16 11:41:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 567 transitions. [2022-11-16 11:41:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-16 11:41:22,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:22,743 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] [2022-11-16 11:41:22,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:23,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:23,146 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)] === [2022-11-16 11:41:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:23,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1975256279, now seen corresponding path program 1 times [2022-11-16 11:41:23,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:23,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1697906124] [2022-11-16 11:41:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:23,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:23,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:23,148 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:23,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2022-11-16 11:41:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:23,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 11:41:23,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:23,274 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:23,403 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:23,404 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:23,572 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:23,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:41:23,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:41:24,122 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:24,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1697906124] [2022-11-16 11:41:24,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1697906124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:24,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:24,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2022-11-16 11:41:24,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875268009] [2022-11-16 11:41:24,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:24,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:41:24,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:41:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:41:24,124 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) [2022-11-16 11:41:25,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:25,956 INFO L93 Difference]: Finished difference Result 520 states and 653 transitions. [2022-11-16 11:41:25,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:41:25,957 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 [2022-11-16 11:41:25,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:25,959 INFO L225 Difference]: With dead ends: 520 [2022-11-16 11:41:25,959 INFO L226 Difference]: Without dead ends: 520 [2022-11-16 11:41:25,960 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 [2022-11-16 11:41:25,960 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 192 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1795 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:25,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 1795 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 740 Invalid, 0 Unknown, 199 Unchecked, 1.7s Time] [2022-11-16 11:41:25,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-16 11:41:25,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 441. [2022-11-16 11:41:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 287 states have (on average 1.759581881533101) internal successors, (505), 402 states have internal predecessors, (505), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 27 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-16 11:41:25,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 566 transitions. [2022-11-16 11:41:25,975 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 566 transitions. Word has length 30 [2022-11-16 11:41:25,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:25,975 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 566 transitions. [2022-11-16 11:41:25,975 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) [2022-11-16 11:41:25,975 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 566 transitions. [2022-11-16 11:41:25,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:41:25,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:25,976 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] [2022-11-16 11:41:25,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2022-11-16 11:41:26,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:26,189 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)] === [2022-11-16 11:41:26,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:26,189 INFO L85 PathProgramCache]: Analyzing trace with hash -154246822, now seen corresponding path program 1 times [2022-11-16 11:41:26,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:26,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [362790013] [2022-11-16 11:41:26,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:26,190 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:26,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:26,191 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:26,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-11-16 11:41:26,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:26,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:41:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:26,421 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:26,421 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:26,569 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:26,569 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:26,831 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:26,870 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:26,882 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:26,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:27,035 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:27,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [362790013] [2022-11-16 11:41:27,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [362790013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:27,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [578470197] [2022-11-16 11:41:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:27,036 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:41:27,037 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:41:27,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2022-11-16 11:41:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:27,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:41:27,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:27,278 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:27,367 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:27,368 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:27,570 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:27,570 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:27,935 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:28,150 INFO L321 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-16 11:41:28,151 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:28,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:28,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:28,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [578470197] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:28,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:28,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 13 [2022-11-16 11:41:28,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930944714] [2022-11-16 11:41:28,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:28,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:41:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:41:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:41:28,563 INFO L87 Difference]: Start difference. First operand 441 states and 566 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) [2022-11-16 11:41:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:31,585 INFO L93 Difference]: Finished difference Result 449 states and 575 transitions. [2022-11-16 11:41:31,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-16 11:41:31,592 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 [2022-11-16 11:41:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:31,594 INFO L225 Difference]: With dead ends: 449 [2022-11-16 11:41:31,594 INFO L226 Difference]: Without dead ends: 449 [2022-11-16 11:41:31,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=138, Invalid=413, Unknown=1, NotChecked=0, Total=552 [2022-11-16 11:41:31,595 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 21 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:31,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 919 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 326 Invalid, 0 Unknown, 199 Unchecked, 0.9s Time] [2022-11-16 11:41:31,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-16 11:41:31,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-11-16 11:41:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 295 states have (on average 1.7423728813559323) internal successors, (514), 410 states have internal predecessors, (514), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 27 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-16 11:41:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 575 transitions. [2022-11-16 11:41:31,611 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 575 transitions. Word has length 32 [2022-11-16 11:41:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:31,612 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 575 transitions. [2022-11-16 11:41:31,612 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) [2022-11-16 11:41:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 575 transitions. [2022-11-16 11:41:31,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:41:31,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:31,613 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] [2022-11-16 11:41:31,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:31,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:32,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:32,017 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)] === [2022-11-16 11:41:32,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:32,017 INFO L85 PathProgramCache]: Analyzing trace with hash -154246821, now seen corresponding path program 1 times [2022-11-16 11:41:32,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:32,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [614888986] [2022-11-16 11:41:32,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:32,018 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:32,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:32,020 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:32,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-11-16 11:41:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:32,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 11:41:32,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:34,399 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:40,658 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:41:40,659 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 2 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:41:41,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:41,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:41,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [614888986] [2022-11-16 11:41:41,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [614888986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:41,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1676171054] [2022-11-16 11:41:41,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:41,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:41,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:41:41,761 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:41:41,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2022-11-16 11:41:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:41,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:41:41,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:42,000 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:42,169 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:42,170 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:42,182 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:42,341 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:41:42,341 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 11:41:42,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:43,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1676171054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:43,166 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:43,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2022-11-16 11:41:43,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021023404] [2022-11-16 11:41:43,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:43,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:41:43,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:43,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:41:43,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=153, Unknown=7, NotChecked=0, Total=210 [2022-11-16 11:41:43,167 INFO L87 Difference]: Start difference. First operand 449 states and 575 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) [2022-11-16 11:41:53,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:53,740 INFO L93 Difference]: Finished difference Result 449 states and 574 transitions. [2022-11-16 11:41:53,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:41:53,741 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 [2022-11-16 11:41:53,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:53,743 INFO L225 Difference]: With dead ends: 449 [2022-11-16 11:41:53,743 INFO L226 Difference]: Without dead ends: 449 [2022-11-16 11:41:53,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=123, Invalid=372, Unknown=11, NotChecked=0, Total=506 [2022-11-16 11:41:53,744 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 12 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 574 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:53,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 2054 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 700 Invalid, 0 Unknown, 574 Unchecked, 2.1s Time] [2022-11-16 11:41:53,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-11-16 11:41:53,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-11-16 11:41:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 295 states have (on average 1.7389830508474575) internal successors, (513), 410 states have internal predecessors, (513), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 27 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-16 11:41:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 574 transitions. [2022-11-16 11:41:53,757 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 574 transitions. Word has length 32 [2022-11-16 11:41:53,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:53,758 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 574 transitions. [2022-11-16 11:41:53,758 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) [2022-11-16 11:41:53,758 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 574 transitions. [2022-11-16 11:41:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-16 11:41:53,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:53,759 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] [2022-11-16 11:41:53,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:53,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:54,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:54,171 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)] === [2022-11-16 11:41:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:54,171 INFO L85 PathProgramCache]: Analyzing trace with hash 139156185, now seen corresponding path program 1 times [2022-11-16 11:41:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1336055311] [2022-11-16 11:41:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:54,172 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:54,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:54,173 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:54,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-11-16 11:41:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:54,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:41:54,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:54,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:54,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:54,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1336055311] [2022-11-16 11:41:54,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1336055311] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:54,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:54,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:54,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773587539] [2022-11-16 11:41:54,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:54,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:54,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:54,307 INFO L87 Difference]: Start difference. First operand 449 states and 574 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) [2022-11-16 11:41:54,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:54,390 INFO L93 Difference]: Finished difference Result 476 states and 605 transitions. [2022-11-16 11:41:54,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:54,391 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 [2022-11-16 11:41:54,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:54,393 INFO L225 Difference]: With dead ends: 476 [2022-11-16 11:41:54,393 INFO L226 Difference]: Without dead ends: 476 [2022-11-16 11:41:54,394 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 [2022-11-16 11:41:54,394 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 [2022-11-16 11:41:54,395 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] [2022-11-16 11:41:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-11-16 11:41:54,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2022-11-16 11:41:54,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 289 states have (on average 1.7508650519031141) internal successors, (506), 404 states have internal predecessors, (506), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 27 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-16 11:41:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 567 transitions. [2022-11-16 11:41:54,408 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 567 transitions. Word has length 32 [2022-11-16 11:41:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:54,409 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 567 transitions. [2022-11-16 11:41:54,409 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) [2022-11-16 11:41:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 567 transitions. [2022-11-16 11:41:54,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:41:54,410 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:54,410 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] [2022-11-16 11:41:54,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2022-11-16 11:41:54,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:54,622 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)] === [2022-11-16 11:41:54,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:54,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263433, now seen corresponding path program 1 times [2022-11-16 11:41:54,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:54,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [907390653] [2022-11-16 11:41:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:54,624 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:54,625 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:54,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2022-11-16 11:41:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:54,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:41:54,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:41:54,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:54,896 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:41:54,896 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:54,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [907390653] [2022-11-16 11:41:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [907390653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:41:54,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:54,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-16 11:41:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845512332] [2022-11-16 11:41:54,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:54,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:54,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:54,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:54,897 INFO L87 Difference]: Start difference. First operand 443 states and 567 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) [2022-11-16 11:41:54,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:54,978 INFO L93 Difference]: Finished difference Result 442 states and 566 transitions. [2022-11-16 11:41:54,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:54,979 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 [2022-11-16 11:41:54,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:54,980 INFO L225 Difference]: With dead ends: 442 [2022-11-16 11:41:54,980 INFO L226 Difference]: Without dead ends: 442 [2022-11-16 11:41:54,981 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 [2022-11-16 11:41:54,988 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 [2022-11-16 11:41:54,989 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] [2022-11-16 11:41:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-16 11:41:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-11-16 11:41:55,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 289 states have (on average 1.7474048442906573) internal successors, (505), 403 states have internal predecessors, (505), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (35), 27 states have call predecessors, (35), 26 states have call successors, (35) [2022-11-16 11:41:55,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 566 transitions. [2022-11-16 11:41:55,002 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 566 transitions. Word has length 33 [2022-11-16 11:41:55,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:55,002 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 566 transitions. [2022-11-16 11:41:55,002 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) [2022-11-16 11:41:55,002 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 566 transitions. [2022-11-16 11:41:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:41:55,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:55,003 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] [2022-11-16 11:41:55,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:55,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:55,215 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:41:55,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:55,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1682263216, now seen corresponding path program 1 times [2022-11-16 11:41:55,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:55,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403947283] [2022-11-16 11:41:55,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:55,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:55,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:55,218 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:55,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-11-16 11:41:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:55,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:41:55,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:41:55,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:41:55,407 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:55,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403947283] [2022-11-16 11:41:55,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403947283] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:41:55,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:41:55,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:41:55,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53315689] [2022-11-16 11:41:55,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:55,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:41:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:55,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:41:55,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:41:55,409 INFO L87 Difference]: Start difference. First operand 442 states and 566 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) [2022-11-16 11:41:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:55,485 INFO L93 Difference]: Finished difference Result 404 states and 446 transitions. [2022-11-16 11:41:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:41:55,486 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 [2022-11-16 11:41:55,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:55,487 INFO L225 Difference]: With dead ends: 404 [2022-11-16 11:41:55,488 INFO L226 Difference]: Without dead ends: 404 [2022-11-16 11:41:55,488 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 [2022-11-16 11:41:55,488 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 [2022-11-16 11:41:55,489 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] [2022-11-16 11:41:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-16 11:41:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 353. [2022-11-16 11:41:55,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 211 states have (on average 1.6777251184834123) internal successors, (354), 325 states have internal predecessors, (354), 16 states have call successors, (16), 11 states have call predecessors, (16), 14 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-16 11:41:55,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 390 transitions. [2022-11-16 11:41:55,498 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 390 transitions. Word has length 33 [2022-11-16 11:41:55,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:55,498 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 390 transitions. [2022-11-16 11:41:55,498 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) [2022-11-16 11:41:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 390 transitions. [2022-11-16 11:41:55,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:41:55,499 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:55,499 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] [2022-11-16 11:41:55,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2022-11-16 11:41:55,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:55,711 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)] === [2022-11-16 11:41:55,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:55,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634065, now seen corresponding path program 1 times [2022-11-16 11:41:55,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:55,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945440702] [2022-11-16 11:41:55,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:55,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:55,713 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:55,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2022-11-16 11:41:55,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:55,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:41:55,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:55,890 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_322 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_322) |c_#valid|)))) is different from true [2022-11-16 11:41:55,936 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:55,937 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:55,968 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-16 11:41:55,995 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:41:55,995 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:56,016 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 2 not checked. [2022-11-16 11:41:56,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:41:56,314 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:56,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945440702] [2022-11-16 11:41:56,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945440702] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:56,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:41:56,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2022-11-16 11:41:56,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609558738] [2022-11-16 11:41:56,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:41:56,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:41:56,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:56,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:41:56,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=14, Unknown=2, NotChecked=14, Total=42 [2022-11-16 11:41:56,316 INFO L87 Difference]: Start difference. First operand 353 states and 390 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) [2022-11-16 11:41:56,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:41:56,737 INFO L93 Difference]: Finished difference Result 357 states and 394 transitions. [2022-11-16 11:41:56,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:41:56,739 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 [2022-11-16 11:41:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:41:56,744 INFO L225 Difference]: With dead ends: 357 [2022-11-16 11:41:56,744 INFO L226 Difference]: Without dead ends: 357 [2022-11-16 11:41:56,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=14, Unknown=2, NotChecked=14, Total=42 [2022-11-16 11:41:56,745 INFO L413 NwaCegarLoop]: 321 mSDtfsCounter, 22 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:41:56,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 702 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 149 Unchecked, 0.4s Time] [2022-11-16 11:41:56,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-11-16 11:41:56,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 352. [2022-11-16 11:41:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 211 states have (on average 1.6729857819905214) internal successors, (353), 324 states have internal predecessors, (353), 16 states have call successors, (16), 11 states have call predecessors, (16), 14 states have return successors, (20), 18 states have call predecessors, (20), 16 states have call successors, (20) [2022-11-16 11:41:56,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 389 transitions. [2022-11-16 11:41:56,755 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 389 transitions. Word has length 33 [2022-11-16 11:41:56,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:41:56,755 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 389 transitions. [2022-11-16 11:41:56,755 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) [2022-11-16 11:41:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 389 transitions. [2022-11-16 11:41:56,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-16 11:41:56,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:41:56,756 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] [2022-11-16 11:41:56,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2022-11-16 11:41:56,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:56,970 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)] === [2022-11-16 11:41:56,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:41:56,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1653634066, now seen corresponding path program 1 times [2022-11-16 11:41:56,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:41:56,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230064508] [2022-11-16 11:41:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:56,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:41:56,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:41:56,972 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:41:56,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2022-11-16 11:41:57,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:57,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:41:57,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:57,134 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,145 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,310 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_350 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_350) |c_#length|)))) is different from true [2022-11-16 11:41:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:57,333 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,357 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:57,358 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,444 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_352 (_ BitVec 1))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_352) |c_#valid|)) (exists ((v_ArrVal_351 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_351) |c_#length|)))) is different from true [2022-11-16 11:41:57,522 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:57,522 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,530 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,615 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_353 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_353) |c_#length|)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-16 11:41:57,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:57,639 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,656 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:57,656 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:57,683 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 12 not checked. [2022-11-16 11:41:57,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:58,135 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:41:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230064508] [2022-11-16 11:41:58,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230064508] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:58,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [827565524] [2022-11-16 11:41:58,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:41:58,136 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:41:58,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:41:58,137 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:41:58,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2022-11-16 11:41:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:41:58,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:41:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:41:58,418 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,431 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,587 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:58,587 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,597 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,710 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_380 (_ BitVec 1))) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_380))) (exists ((v_ArrVal_381 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_381) |c_#length|)))) is different from true [2022-11-16 11:41:58,777 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:41:58,778 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,801 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,871 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_382 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_382))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-16 11:41:58,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:41:58,896 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,912 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:41:58,912 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:41:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2022-11-16 11:41:58,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:41:59,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [827565524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:41:59,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:41:59,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2022-11-16 11:41:59,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951115206] [2022-11-16 11:41:59,183 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:41:59,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 11:41:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:41:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 11:41:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=110, Unknown=5, NotChecked=120, Total=272 [2022-11-16 11:41:59,185 INFO L87 Difference]: Start difference. First operand 352 states and 389 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:42:04,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:04,356 INFO L93 Difference]: Finished difference Result 610 states and 683 transitions. [2022-11-16 11:42:04,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:04,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) Word has length 33 [2022-11-16 11:42:04,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:04,359 INFO L225 Difference]: With dead ends: 610 [2022-11-16 11:42:04,359 INFO L226 Difference]: Without dead ends: 610 [2022-11-16 11:42:04,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=46, Invalid=151, Unknown=5, NotChecked=140, Total=342 [2022-11-16 11:42:04,361 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 448 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3150 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:04,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 1489 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1460 Invalid, 0 Unknown, 3150 Unchecked, 4.9s Time] [2022-11-16 11:42:04,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2022-11-16 11:42:04,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 356. [2022-11-16 11:42:04,371 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) [2022-11-16 11:42:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 397 transitions. [2022-11-16 11:42:04,373 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 397 transitions. Word has length 33 [2022-11-16 11:42:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:04,373 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 397 transitions. [2022-11-16 11:42:04,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 7 states have return successors, (7), 4 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:42:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 397 transitions. [2022-11-16 11:42:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:42:04,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:04,375 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] [2022-11-16 11:42:04,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:04,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2022-11-16 11:42:04,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:42:04,791 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)] === [2022-11-16 11:42:04,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:04,791 INFO L85 PathProgramCache]: Analyzing trace with hash 610559287, now seen corresponding path program 1 times [2022-11-16 11:42:04,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:04,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [90323038] [2022-11-16 11:42:04,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:04,792 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:04,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:04,794 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:04,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2022-11-16 11:42:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:04,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:42:04,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:42:05,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:42:05,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [90323038] [2022-11-16 11:42:05,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [90323038] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:05,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:05,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:42:05,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73685154] [2022-11-16 11:42:05,630 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:05,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:42:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:42:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:05,631 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) [2022-11-16 11:42:05,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:05,898 INFO L93 Difference]: Finished difference Result 560 states and 625 transitions. [2022-11-16 11:42:05,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:42:05,899 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 [2022-11-16 11:42:05,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:05,903 INFO L225 Difference]: With dead ends: 560 [2022-11-16 11:42:05,903 INFO L226 Difference]: Without dead ends: 560 [2022-11-16 11:42:05,903 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 [2022-11-16 11:42:05,904 INFO L413 NwaCegarLoop]: 425 mSDtfsCounter, 295 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 2078 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:05,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 2078 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 78 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2022-11-16 11:42:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-11-16 11:42:05,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 439. [2022-11-16 11:42:05,916 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) [2022-11-16 11:42:05,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 549 transitions. [2022-11-16 11:42:05,918 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 549 transitions. Word has length 34 [2022-11-16 11:42:05,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:05,918 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 549 transitions. [2022-11-16 11:42:05,919 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) [2022-11-16 11:42:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 549 transitions. [2022-11-16 11:42:05,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:42:05,919 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:05,920 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:42:05,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2022-11-16 11:42:06,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:06,135 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)] === [2022-11-16 11:42:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671515, now seen corresponding path program 1 times [2022-11-16 11:42:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:06,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071453229] [2022-11-16 11:42:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:06,137 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:06,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:06,138 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:06,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2022-11-16 11:42:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:06,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:42:06,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:06,633 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:06,634 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:06,639 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:06,871 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:07,010 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:42:07,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:07,274 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-16 11:42:07,274 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:07,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:42:07,649 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:07,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2071453229] [2022-11-16 11:42:07,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2071453229] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:07,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:42:07,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-16 11:42:07,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551682195] [2022-11-16 11:42:07,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:07,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:42:07,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:07,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:42:07,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:42:07,651 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) [2022-11-16 11:42:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:09,951 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-11-16 11:42:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:09,952 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 [2022-11-16 11:42:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:09,953 INFO L225 Difference]: With dead ends: 479 [2022-11-16 11:42:09,953 INFO L226 Difference]: Without dead ends: 479 [2022-11-16 11:42:09,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:42:09,954 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 101 mSDsluCounter, 1140 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1455 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:09,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1455 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-16 11:42:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-16 11:42:09,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-11-16 11:42:09,963 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) [2022-11-16 11:42:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 552 transitions. [2022-11-16 11:42:09,964 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 552 transitions. Word has length 34 [2022-11-16 11:42:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:09,965 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 552 transitions. [2022-11-16 11:42:09,965 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) [2022-11-16 11:42:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 552 transitions. [2022-11-16 11:42:09,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-16 11:42:09,966 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:09,966 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] [2022-11-16 11:42:09,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:10,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:10,177 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)] === [2022-11-16 11:42:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2092671516, now seen corresponding path program 1 times [2022-11-16 11:42:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:10,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826787746] [2022-11-16 11:42:10,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:10,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:10,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:10,180 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:10,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2022-11-16 11:42:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:42:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:10,762 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:10,763 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:10,771 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:10,816 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:10,817 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:10,826 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:11,183 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:11,351 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:11,368 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:42:11,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:11,643 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:42:11,643 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:11,812 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:12,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:42:12,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:12,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826787746] [2022-11-16 11:42:12,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826787746] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:12,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:42:12,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 16 [2022-11-16 11:42:12,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251654856] [2022-11-16 11:42:12,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:12,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:42:12,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:12,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:42:12,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:42:12,760 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) [2022-11-16 11:42:16,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:16,272 INFO L93 Difference]: Finished difference Result 479 states and 591 transitions. [2022-11-16 11:42:16,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:16,273 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 [2022-11-16 11:42:16,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:16,275 INFO L225 Difference]: With dead ends: 479 [2022-11-16 11:42:16,275 INFO L226 Difference]: Without dead ends: 479 [2022-11-16 11:42:16,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:42:16,276 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 142 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 1499 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:16,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 1499 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-16 11:42:16,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-16 11:42:16,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 441. [2022-11-16 11:42:16,283 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) [2022-11-16 11:42:16,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 551 transitions. [2022-11-16 11:42:16,284 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 551 transitions. Word has length 34 [2022-11-16 11:42:16,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:16,284 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 551 transitions. [2022-11-16 11:42:16,285 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) [2022-11-16 11:42:16,285 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 551 transitions. [2022-11-16 11:42:16,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:42:16,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:16,285 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] [2022-11-16 11:42:16,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:16,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:16,486 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)] === [2022-11-16 11:42:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1747469131, now seen corresponding path program 1 times [2022-11-16 11:42:16,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:16,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [341382643] [2022-11-16 11:42:16,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:16,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:16,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:16,488 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:16,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2022-11-16 11:42:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:42:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:16,633 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:42:16,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:42:16,870 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:16,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [341382643] [2022-11-16 11:42:16,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [341382643] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:16,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:16,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-16 11:42:16,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816517780] [2022-11-16 11:42:16,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:16,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:42:16,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:16,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:42:16,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:42:16,871 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) [2022-11-16 11:42:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:18,531 INFO L93 Difference]: Finished difference Result 446 states and 557 transitions. [2022-11-16 11:42:18,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:42:18,533 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 [2022-11-16 11:42:18,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:18,535 INFO L225 Difference]: With dead ends: 446 [2022-11-16 11:42:18,535 INFO L226 Difference]: Without dead ends: 446 [2022-11-16 11:42:18,535 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 [2022-11-16 11:42:18,535 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 41 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1170 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:18,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1170 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 630 Invalid, 0 Unknown, 123 Unchecked, 1.6s Time] [2022-11-16 11:42:18,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-16 11:42:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-11-16 11:42:18,543 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) [2022-11-16 11:42:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 554 transitions. [2022-11-16 11:42:18,544 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 554 transitions. Word has length 35 [2022-11-16 11:42:18,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:18,545 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 554 transitions. [2022-11-16 11:42:18,545 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) [2022-11-16 11:42:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 554 transitions. [2022-11-16 11:42:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-16 11:42:18,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:18,546 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] [2022-11-16 11:42:18,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:18,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:18,758 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)] === [2022-11-16 11:42:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash 4658796, now seen corresponding path program 1 times [2022-11-16 11:42:18,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:18,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [177841565] [2022-11-16 11:42:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:18,759 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:18,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:18,760 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:18,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2022-11-16 11:42:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:18,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:42:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:42:18,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:18,924 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [177841565] [2022-11-16 11:42:18,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [177841565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:18,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:18,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:42:18,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867706092] [2022-11-16 11:42:18,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:18,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:18,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:18,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:18,929 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) [2022-11-16 11:42:19,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:19,010 INFO L93 Difference]: Finished difference Result 488 states and 600 transitions. [2022-11-16 11:42:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:19,010 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 [2022-11-16 11:42:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:19,011 INFO L225 Difference]: With dead ends: 488 [2022-11-16 11:42:19,011 INFO L226 Difference]: Without dead ends: 488 [2022-11-16 11:42:19,012 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 [2022-11-16 11:42:19,012 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 [2022-11-16 11:42:19,012 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] [2022-11-16 11:42:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-16 11:42:19,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 442. [2022-11-16 11:42:19,019 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) [2022-11-16 11:42:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 551 transitions. [2022-11-16 11:42:19,020 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 551 transitions. Word has length 35 [2022-11-16 11:42:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:19,020 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 551 transitions. [2022-11-16 11:42:19,021 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) [2022-11-16 11:42:19,021 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 551 transitions. [2022-11-16 11:42:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:42:19,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:19,021 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] [2022-11-16 11:42:19,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:19,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:19,233 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)] === [2022-11-16 11:42:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -14364371, now seen corresponding path program 1 times [2022-11-16 11:42:19,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:19,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1185942398] [2022-11-16 11:42:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:19,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:19,235 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:19,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2022-11-16 11:42:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:19,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:42:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:42:19,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:42:20,184 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:20,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1185942398] [2022-11-16 11:42:20,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1185942398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:20,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:20,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:42:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673278076] [2022-11-16 11:42:20,184 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:20,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:42:20,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:20,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:42:20,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:42:20,186 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) [2022-11-16 11:42:20,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:20,321 INFO L93 Difference]: Finished difference Result 446 states and 556 transitions. [2022-11-16 11:42:20,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:42:20,322 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 [2022-11-16 11:42:20,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:20,325 INFO L225 Difference]: With dead ends: 446 [2022-11-16 11:42:20,325 INFO L226 Difference]: Without dead ends: 446 [2022-11-16 11:42:20,325 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 [2022-11-16 11:42:20,326 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 23 mSDsluCounter, 1475 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 1803 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:20,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 1803 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-11-16 11:42:20,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-16 11:42:20,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 444. [2022-11-16 11:42:20,333 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) [2022-11-16 11:42:20,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 553 transitions. [2022-11-16 11:42:20,335 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 553 transitions. Word has length 37 [2022-11-16 11:42:20,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:20,335 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 553 transitions. [2022-11-16 11:42:20,335 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) [2022-11-16 11:42:20,335 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 553 transitions. [2022-11-16 11:42:20,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:42:20,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:20,336 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] [2022-11-16 11:42:20,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:20,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:20,548 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)] === [2022-11-16 11:42:20,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:20,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181508, now seen corresponding path program 1 times [2022-11-16 11:42:20,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:20,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498274196] [2022-11-16 11:42:20,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:20,548 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:20,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:20,549 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:20,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2022-11-16 11:42:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:42:20,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:42:20,708 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:20,708 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:20,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498274196] [2022-11-16 11:42:20,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498274196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:20,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:20,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:42:20,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032894217] [2022-11-16 11:42:20,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:42:20,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:20,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:42:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:42:20,710 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) [2022-11-16 11:42:21,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:21,289 INFO L93 Difference]: Finished difference Result 462 states and 573 transitions. [2022-11-16 11:42:21,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:21,290 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 [2022-11-16 11:42:21,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:21,291 INFO L225 Difference]: With dead ends: 462 [2022-11-16 11:42:21,291 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 11:42:21,291 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 [2022-11-16 11:42:21,291 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 [2022-11-16 11:42:21,291 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] [2022-11-16 11:42:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 11:42:21,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 445. [2022-11-16 11:42:21,297 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) [2022-11-16 11:42:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 556 transitions. [2022-11-16 11:42:21,299 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 556 transitions. Word has length 37 [2022-11-16 11:42:21,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:21,299 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 556 transitions. [2022-11-16 11:42:21,299 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) [2022-11-16 11:42:21,299 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 556 transitions. [2022-11-16 11:42:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-16 11:42:21,300 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:21,300 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] [2022-11-16 11:42:21,313 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (48)] Ended with exit code 0 [2022-11-16 11:42:21,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:21,512 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)] === [2022-11-16 11:42:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:21,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1327181509, now seen corresponding path program 1 times [2022-11-16 11:42:21,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:21,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1476880153] [2022-11-16 11:42:21,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:21,513 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:21,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:21,514 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:21,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2022-11-16 11:42:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:21,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-16 11:42:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:22,007 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:22,007 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,017 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,059 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:22,059 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,070 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,385 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,569 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,579 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,612 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:42:22,612 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:42:22,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:22,910 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:23,331 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:42:23,331 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:23,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1476880153] [2022-11-16 11:42:23,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1476880153] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:23,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:42:23,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2022-11-16 11:42:23,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546762209] [2022-11-16 11:42:23,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:23,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:42:23,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:42:23,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:42:23,333 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) [2022-11-16 11:42:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:24,815 INFO L93 Difference]: Finished difference Result 451 states and 561 transitions. [2022-11-16 11:42:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-16 11:42:24,817 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 [2022-11-16 11:42:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:24,819 INFO L225 Difference]: With dead ends: 451 [2022-11-16 11:42:24,819 INFO L226 Difference]: Without dead ends: 451 [2022-11-16 11:42:24,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2022-11-16 11:42:24,819 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 56 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1670 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:24,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1670 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-16 11:42:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-11-16 11:42:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 447. [2022-11-16 11:42:24,826 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) [2022-11-16 11:42:24,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 558 transitions. [2022-11-16 11:42:24,828 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 558 transitions. Word has length 37 [2022-11-16 11:42:24,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:24,828 INFO L495 AbstractCegarLoop]: Abstraction has 447 states and 558 transitions. [2022-11-16 11:42:24,828 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) [2022-11-16 11:42:24,829 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 558 transitions. [2022-11-16 11:42:24,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-16 11:42:24,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:24,829 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] [2022-11-16 11:42:24,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2022-11-16 11:42:25,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:25,041 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)] === [2022-11-16 11:42:25,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:25,041 INFO L85 PathProgramCache]: Analyzing trace with hash -445295076, now seen corresponding path program 1 times [2022-11-16 11:42:25,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:25,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [120833198] [2022-11-16 11:42:25,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:25,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:25,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:25,042 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:25,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2022-11-16 11:42:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:25,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:42:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:25,187 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:25,276 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:42:25,276 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:25,406 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:42:25,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:25,607 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:42:25,780 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:25,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [120833198] [2022-11-16 11:42:25,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [120833198] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:25,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:25,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2022-11-16 11:42:25,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998701126] [2022-11-16 11:42:25,780 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:42:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:42:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:42:25,781 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) [2022-11-16 11:42:26,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:26,985 INFO L93 Difference]: Finished difference Result 454 states and 565 transitions. [2022-11-16 11:42:26,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:42:26,987 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 [2022-11-16 11:42:26,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:26,988 INFO L225 Difference]: With dead ends: 454 [2022-11-16 11:42:26,988 INFO L226 Difference]: Without dead ends: 454 [2022-11-16 11:42:26,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:42:26,989 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 255 mSDsluCounter, 1540 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 1877 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:26,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 1877 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 537 Invalid, 0 Unknown, 164 Unchecked, 1.1s Time] [2022-11-16 11:42:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-11-16 11:42:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 448. [2022-11-16 11:42:26,995 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) [2022-11-16 11:42:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 559 transitions. [2022-11-16 11:42:26,997 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 559 transitions. Word has length 38 [2022-11-16 11:42:26,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:26,997 INFO L495 AbstractCegarLoop]: Abstraction has 448 states and 559 transitions. [2022-11-16 11:42:26,997 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) [2022-11-16 11:42:26,997 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 559 transitions. [2022-11-16 11:42:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-16 11:42:26,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:26,998 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] [2022-11-16 11:42:27,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2022-11-16 11:42:27,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:27,210 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)] === [2022-11-16 11:42:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash -183877918, now seen corresponding path program 1 times [2022-11-16 11:42:27,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:27,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226210078] [2022-11-16 11:42:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:27,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:27,212 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:27,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Waiting until timeout for monitored process [2022-11-16 11:42:27,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:27,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 11:42:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:33,846 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_557 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_557))) (and (= (store (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-11-16 11:42:33,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:42:33,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:36,304 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret66#1.base_71| (_ BitVec 32))) (or (= (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_71| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|) (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret66#1.base_71|) (_ bv0 1))))) is different from false [2022-11-16 11:42:36,306 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226210078] [2022-11-16 11:42:36,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226210078] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:36,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [172693797] [2022-11-16 11:42:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:36,306 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:42:36,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:42:36,307 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:42:36,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2022-11-16 11:42:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:36,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-16 11:42:36,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:43,730 WARN L855 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_ArrVal_553 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_553))) (let ((.cse1 (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= |c_#valid| (store .cse1 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (= (_ bv0 1) (bvadd (select .cse1 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1))) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))))))) is different from true [2022-11-16 11:42:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:42:43,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:44,382 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:50,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [172693797] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:50,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:50,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2022-11-16 11:42:50,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355947611] [2022-11-16 11:42:50,978 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:50,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-16 11:42:50,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:50,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-16 11:42:50,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=633, Unknown=13, NotChecked=162, Total=930 [2022-11-16 11:42:50,980 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) [2022-11-16 11:42:51,015 WARN L855 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_ArrVal_553 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_553))) (let ((.cse1 (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= |c_#valid| (store .cse1 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (= (_ bv0 1) (bvadd (select .cse1 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1))) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))))))) (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_557 (_ BitVec 1))) (let ((.cse2 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_557))) (and (= (store (store .cse2 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse2 |ULTIMATE.start_entry_point_~cfg~2#1.base|))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|))))) is different from true [2022-11-16 11:42:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:52,306 INFO L93 Difference]: Finished difference Result 453 states and 564 transitions. [2022-11-16 11:42:52,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:42:52,308 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 [2022-11-16 11:42:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:52,309 INFO L225 Difference]: With dead ends: 453 [2022-11-16 11:42:52,310 INFO L226 Difference]: Without dead ends: 434 [2022-11-16 11:42:52,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 4 IntricatePredicates, 3 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=124, Invalid=634, Unknown=14, NotChecked=220, Total=992 [2022-11-16 11:42:52,311 INFO L413 NwaCegarLoop]: 288 mSDtfsCounter, 41 mSDsluCounter, 1745 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2033 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1483 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:52,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2033 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 414 Invalid, 0 Unknown, 1483 Unchecked, 1.3s Time] [2022-11-16 11:42:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-16 11:42:52,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 432. [2022-11-16 11:42:52,319 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) [2022-11-16 11:42:52,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 542 transitions. [2022-11-16 11:42:52,321 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 542 transitions. Word has length 39 [2022-11-16 11:42:52,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:52,321 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 542 transitions. [2022-11-16 11:42:52,321 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) [2022-11-16 11:42:52,321 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 542 transitions. [2022-11-16 11:42:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:42:52,322 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:52,322 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] [2022-11-16 11:42:52,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:52,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (51)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:52,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:52,727 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)] === [2022-11-16 11:42:52,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:52,727 INFO L85 PathProgramCache]: Analyzing trace with hash -789046589, now seen corresponding path program 1 times [2022-11-16 11:42:52,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:52,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [986946249] [2022-11-16 11:42:52,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:52,728 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:52,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:52,729 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:52,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2022-11-16 11:42:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:52,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:42:52,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:42:52,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:42:52,979 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [986946249] [2022-11-16 11:42:52,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [986946249] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:42:52,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:42:52,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-16 11:42:52,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763403671] [2022-11-16 11:42:52,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:42:52,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:52,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:52,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:42:52,982 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) [2022-11-16 11:42:53,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:53,050 INFO L93 Difference]: Finished difference Result 431 states and 541 transitions. [2022-11-16 11:42:53,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:53,051 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 [2022-11-16 11:42:53,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:53,054 INFO L225 Difference]: With dead ends: 431 [2022-11-16 11:42:53,054 INFO L226 Difference]: Without dead ends: 431 [2022-11-16 11:42:53,054 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 [2022-11-16 11:42:53,054 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 [2022-11-16 11:42:53,055 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] [2022-11-16 11:42:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2022-11-16 11:42:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 431. [2022-11-16 11:42:53,061 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) [2022-11-16 11:42:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 541 transitions. [2022-11-16 11:42:53,062 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 541 transitions. Word has length 41 [2022-11-16 11:42:53,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:53,062 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 541 transitions. [2022-11-16 11:42:53,062 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) [2022-11-16 11:42:53,062 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 541 transitions. [2022-11-16 11:42:53,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:42:53,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:53,063 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] [2022-11-16 11:42:53,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:53,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:53,267 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)] === [2022-11-16 11:42:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:53,267 INFO L85 PathProgramCache]: Analyzing trace with hash -817675940, now seen corresponding path program 1 times [2022-11-16 11:42:53,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:53,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424402069] [2022-11-16 11:42:53,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:53,268 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:53,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:53,269 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:53,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2022-11-16 11:42:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:53,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:42:53,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:53,468 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-16 11:42:53,498 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:42:53,498 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:42:53,521 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:42:53,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:53,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424402069] [2022-11-16 11:42:53,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424402069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:42:53,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:42:53,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:42:53,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437092855] [2022-11-16 11:42:53,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:42:53,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:42:53,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:42:53,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:42:53,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-16 11:42:53,523 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) [2022-11-16 11:42:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:42:54,885 INFO L93 Difference]: Finished difference Result 485 states and 556 transitions. [2022-11-16 11:42:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:42:54,886 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 [2022-11-16 11:42:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:42:54,889 INFO L225 Difference]: With dead ends: 485 [2022-11-16 11:42:54,889 INFO L226 Difference]: Without dead ends: 485 [2022-11-16 11:42:54,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-16 11:42:54,890 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 161 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 476 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:42:54,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 649 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 369 Invalid, 0 Unknown, 476 Unchecked, 1.3s Time] [2022-11-16 11:42:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-16 11:42:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 430. [2022-11-16 11:42:54,897 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) [2022-11-16 11:42:54,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 540 transitions. [2022-11-16 11:42:54,898 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 540 transitions. Word has length 41 [2022-11-16 11:42:54,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:42:54,898 INFO L495 AbstractCegarLoop]: Abstraction has 430 states and 540 transitions. [2022-11-16 11:42:54,898 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) [2022-11-16 11:42:54,899 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 540 transitions. [2022-11-16 11:42:54,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:42:54,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:42:54,899 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] [2022-11-16 11:42:54,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2022-11-16 11:42:55,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:55,107 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)] === [2022-11-16 11:42:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:42:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash -817675939, now seen corresponding path program 1 times [2022-11-16 11:42:55,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:42:55,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1341082270] [2022-11-16 11:42:55,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:55,108 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:42:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:42:55,109 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:42:55,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2022-11-16 11:42:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:42:55,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:55,424 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (exists ((v_ArrVal_664 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_664))) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)))) is different from true [2022-11-16 11:42:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:42:55,449 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:55,463 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:42:55,464 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 2 not checked. [2022-11-16 11:42:55,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:42:58,810 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:42:58,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1341082270] [2022-11-16 11:42:58,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1341082270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:42:58,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2139290726] [2022-11-16 11:42:58,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:42:58,811 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:42:58,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:42:58,812 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:42:58,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2022-11-16 11:42:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:42:59,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:42:59,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:42:59,185 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:59,194 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:59,486 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:42:59,486 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:59,496 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:59,649 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_699 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_699))))) is different from true [2022-11-16 11:42:59,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:42:59,674 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:59,687 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:42:59,687 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:42:59,818 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2022-11-16 11:42:59,852 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:42:59,852 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:00,154 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_701 (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_701) |c_#length|)))) is different from true [2022-11-16 11:43:00,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:00,216 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-16 11:43:00,216 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:00,234 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:43:00,235 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 18 not checked. [2022-11-16 11:43:00,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:00,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2139290726] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:00,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:00,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 16] total 22 [2022-11-16 11:43:00,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801575607] [2022-11-16 11:43:00,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:00,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:43:00,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:00,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:43:00,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=351, Unknown=5, NotChecked=164, Total=600 [2022-11-16 11:43:00,497 INFO L87 Difference]: Start difference. First operand 430 states and 540 transitions. Second operand has 23 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-16 11:43:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:08,358 INFO L93 Difference]: Finished difference Result 674 states and 819 transitions. [2022-11-16 11:43:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:43:08,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) Word has length 41 [2022-11-16 11:43:08,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:08,363 INFO L225 Difference]: With dead ends: 674 [2022-11-16 11:43:08,363 INFO L226 Difference]: Without dead ends: 674 [2022-11-16 11:43:08,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=100, Invalid=463, Unknown=5, NotChecked=188, Total=756 [2022-11-16 11:43:08,366 INFO L413 NwaCegarLoop]: 362 mSDtfsCounter, 571 mSDsluCounter, 3469 mSDsCounter, 0 mSdLazyCounter, 2489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 3831 SdHoareTripleChecker+Invalid, 5227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2683 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:08,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [581 Valid, 3831 Invalid, 5227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2489 Invalid, 0 Unknown, 2683 Unchecked, 7.6s Time] [2022-11-16 11:43:08,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-11-16 11:43:08,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 426. [2022-11-16 11:43:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 280 states have (on average 1.7107142857142856) internal successors, (479), 388 states have internal predecessors, (479), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:08,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 535 transitions. [2022-11-16 11:43:08,379 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 535 transitions. Word has length 41 [2022-11-16 11:43:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:08,379 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 535 transitions. [2022-11-16 11:43:08,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 6 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-16 11:43:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 535 transitions. [2022-11-16 11:43:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-16 11:43:08,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:08,380 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, 1, 1, 1] [2022-11-16 11:43:08,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2022-11-16 11:43:08,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:08,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:08,783 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:08,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:08,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1368793298, now seen corresponding path program 1 times [2022-11-16 11:43:08,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:08,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279246200] [2022-11-16 11:43:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:08,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:08,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:08,785 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:08,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Waiting until timeout for monitored process [2022-11-16 11:43:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:43:08,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:08,954 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:09,092 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:09,093 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:09,297 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:09,297 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:43:09,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:43:09,553 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:43:09,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:10,144 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279246200] [2022-11-16 11:43:10,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [279246200] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:10,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [527429333] [2022-11-16 11:43:10,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:10,145 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:43:10,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:43:10,146 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:43:10,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2022-11-16 11:43:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:10,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:43:10,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:10,446 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:10,534 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:43:10,534 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:10,722 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:10,723 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:43:10,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:43:10,923 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:43:10,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:11,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [527429333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:11,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:11,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2022-11-16 11:43:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620513849] [2022-11-16 11:43:11,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:11,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 11:43:11,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:11,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 11:43:11,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-16 11:43:11,378 INFO L87 Difference]: Start difference. First operand 426 states and 535 transitions. Second operand has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 11:43:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:14,671 INFO L93 Difference]: Finished difference Result 523 states and 598 transitions. [2022-11-16 11:43:14,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:43:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-11-16 11:43:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:14,676 INFO L225 Difference]: With dead ends: 523 [2022-11-16 11:43:14,676 INFO L226 Difference]: Without dead ends: 523 [2022-11-16 11:43:14,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-16 11:43:14,677 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 225 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 1194 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1882 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:14,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1882 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1194 Invalid, 0 Unknown, 21 Unchecked, 3.2s Time] [2022-11-16 11:43:14,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-11-16 11:43:14,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 429. [2022-11-16 11:43:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 283 states have (on average 1.7031802120141342) internal successors, (482), 391 states have internal predecessors, (482), 24 states have call successors, (24), 16 states have call predecessors, (24), 19 states have return successors, (32), 25 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 538 transitions. [2022-11-16 11:43:14,685 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 538 transitions. Word has length 41 [2022-11-16 11:43:14,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:14,686 INFO L495 AbstractCegarLoop]: Abstraction has 429 states and 538 transitions. [2022-11-16 11:43:14,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 11:43:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 538 transitions. [2022-11-16 11:43:14,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:43:14,687 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:14,687 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, 1] [2022-11-16 11:43:14,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:14,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (57)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:15,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:15,091 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:15,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:15,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1309353403, now seen corresponding path program 1 times [2022-11-16 11:43:15,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:15,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [882966058] [2022-11-16 11:43:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:15,092 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:15,093 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2022-11-16 11:43:15,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:15,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:43:15,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:43:15,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:15,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [882966058] [2022-11-16 11:43:15,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [882966058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:15,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:15,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:43:15,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217177106] [2022-11-16 11:43:15,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:15,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:43:15,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:15,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:43:15,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:15,322 INFO L87 Difference]: Start difference. First operand 429 states and 538 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:15,419 INFO L93 Difference]: Finished difference Result 488 states and 602 transitions. [2022-11-16 11:43:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:15,420 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-11-16 11:43:15,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:15,422 INFO L225 Difference]: With dead ends: 488 [2022-11-16 11:43:15,423 INFO L226 Difference]: Without dead ends: 488 [2022-11-16 11:43:15,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:15,423 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 53 mSDsluCounter, 1049 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1420 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:15,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1420 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:43:15,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-16 11:43:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 431. [2022-11-16 11:43:15,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 285 states have (on average 1.6982456140350877) internal successors, (484), 392 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) [2022-11-16 11:43:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 540 transitions. [2022-11-16 11:43:15,432 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 540 transitions. Word has length 42 [2022-11-16 11:43:15,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:15,432 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 540 transitions. [2022-11-16 11:43:15,432 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, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:15,433 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 540 transitions. [2022-11-16 11:43:15,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:43:15,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:15,433 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, 1] [2022-11-16 11:43:15,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:15,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:15,647 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:15,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1309359926, now seen corresponding path program 1 times [2022-11-16 11:43:15,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:15,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1286588831] [2022-11-16 11:43:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:15,648 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:15,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:15,649 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:15,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Waiting until timeout for monitored process [2022-11-16 11:43:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:15,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:43:15,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:43:16,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:16,572 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:43:16,572 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:16,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1286588831] [2022-11-16 11:43:16,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1286588831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:16,572 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:16,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:43:16,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233792242] [2022-11-16 11:43:16,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:16,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:43:16,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:16,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:43:16,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:43:16,574 INFO L87 Difference]: Start difference. First operand 431 states and 540 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, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:43:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:16,993 INFO L93 Difference]: Finished difference Result 556 states and 619 transitions. [2022-11-16 11:43:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:43:16,994 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, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 42 [2022-11-16 11:43:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:16,995 INFO L225 Difference]: With dead ends: 556 [2022-11-16 11:43:16,995 INFO L226 Difference]: Without dead ends: 556 [2022-11-16 11:43:16,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:43:16,996 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 310 mSDsluCounter, 1575 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1990 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:16,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1990 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 92 Unchecked, 0.4s Time] [2022-11-16 11:43:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-11-16 11:43:17,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 439. [2022-11-16 11:43:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 291 states have (on average 1.6872852233676976) internal successors, (491), 399 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 547 transitions. [2022-11-16 11:43:17,006 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 547 transitions. Word has length 42 [2022-11-16 11:43:17,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:17,006 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 547 transitions. [2022-11-16 11:43:17,006 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, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:43:17,007 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 547 transitions. [2022-11-16 11:43:17,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:43:17,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:17,007 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, 1] [2022-11-16 11:43:17,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (60)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:17,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:17,208 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:17,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:17,208 INFO L85 PathProgramCache]: Analyzing trace with hash 421849722, now seen corresponding path program 1 times [2022-11-16 11:43:17,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:17,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084398281] [2022-11-16 11:43:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:17,209 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:17,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:17,210 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:17,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Waiting until timeout for monitored process [2022-11-16 11:43:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:17,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:43:17,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:17,388 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:43:17,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:17,428 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:17,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084398281] [2022-11-16 11:43:17,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084398281] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:17,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:17,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:43:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380907451] [2022-11-16 11:43:17,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:17,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:43:17,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:43:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:17,430 INFO L87 Difference]: Start difference. First operand 439 states and 547 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:18,347 INFO L93 Difference]: Finished difference Result 444 states and 553 transitions. [2022-11-16 11:43:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:18,348 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-11-16 11:43:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:18,349 INFO L225 Difference]: With dead ends: 444 [2022-11-16 11:43:18,350 INFO L226 Difference]: Without dead ends: 444 [2022-11-16 11:43:18,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:18,350 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 14 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:18,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 945 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:43:18,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-16 11:43:18,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 438. [2022-11-16 11:43:18,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 291 states have (on average 1.6838487972508591) internal successors, (490), 398 states have internal predecessors, (490), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:18,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 546 transitions. [2022-11-16 11:43:18,357 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 546 transitions. Word has length 42 [2022-11-16 11:43:18,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:18,357 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 546 transitions. [2022-11-16 11:43:18,357 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), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:18,357 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 546 transitions. [2022-11-16 11:43:18,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 11:43:18,358 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:18,358 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, 1] [2022-11-16 11:43:18,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (61)] Ended with exit code 0 [2022-11-16 11:43:18,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:18,573 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:18,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:18,573 INFO L85 PathProgramCache]: Analyzing trace with hash 421849723, now seen corresponding path program 1 times [2022-11-16 11:43:18,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:18,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706048337] [2022-11-16 11:43:18,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:18,574 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:18,575 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:18,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2022-11-16 11:43:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:18,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:43:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:18,767 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:43:18,874 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:18,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:18,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706048337] [2022-11-16 11:43:18,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706048337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:18,874 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:18,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:43:18,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218975294] [2022-11-16 11:43:18,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:18,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:43:18,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:18,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:43:18,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:43:18,876 INFO L87 Difference]: Start difference. First operand 438 states and 546 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:20,346 INFO L93 Difference]: Finished difference Result 493 states and 606 transitions. [2022-11-16 11:43:20,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:43:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2022-11-16 11:43:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:20,349 INFO L225 Difference]: With dead ends: 493 [2022-11-16 11:43:20,349 INFO L226 Difference]: Without dead ends: 493 [2022-11-16 11:43:20,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:20,350 INFO L413 NwaCegarLoop]: 352 mSDtfsCounter, 57 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:20,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1424 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-16 11:43:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-11-16 11:43:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 437. [2022-11-16 11:43:20,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 291 states have (on average 1.6804123711340206) internal successors, (489), 397 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 545 transitions. [2022-11-16 11:43:20,360 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 545 transitions. Word has length 42 [2022-11-16 11:43:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:20,361 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 545 transitions. [2022-11-16 11:43:20,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:20,361 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 545 transitions. [2022-11-16 11:43:20,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:43:20,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:20,362 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, 1, 1] [2022-11-16 11:43:20,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (62)] Ended with exit code 0 [2022-11-16 11:43:20,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:20,562 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:20,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:20,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1935452453, now seen corresponding path program 1 times [2022-11-16 11:43:20,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:20,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632628573] [2022-11-16 11:43:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:20,564 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:20,565 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:20,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Waiting until timeout for monitored process [2022-11-16 11:43:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:20,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:43:20,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:20,738 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:43:20,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:43:20,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:20,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632628573] [2022-11-16 11:43:20,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632628573] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:20,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:20,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2022-11-16 11:43:20,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366412812] [2022-11-16 11:43:20,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:20,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:43:20,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:20,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:43:20,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:20,956 INFO L87 Difference]: Start difference. First operand 437 states and 545 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:43:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:22,722 INFO L93 Difference]: Finished difference Result 442 states and 551 transitions. [2022-11-16 11:43:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:43:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-16 11:43:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:22,725 INFO L225 Difference]: With dead ends: 442 [2022-11-16 11:43:22,726 INFO L226 Difference]: Without dead ends: 442 [2022-11-16 11:43:22,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:43:22,726 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 41 mSDsluCounter, 852 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:22,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1145 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 120 Unchecked, 1.7s Time] [2022-11-16 11:43:22,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-16 11:43:22,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 440. [2022-11-16 11:43:22,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6734693877551021) internal successors, (492), 400 states have internal predecessors, (492), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:22,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 548 transitions. [2022-11-16 11:43:22,732 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 548 transitions. Word has length 43 [2022-11-16 11:43:22,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:22,732 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 548 transitions. [2022-11-16 11:43:22,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:43:22,733 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 548 transitions. [2022-11-16 11:43:22,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:43:22,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:22,733 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, 1, 1] [2022-11-16 11:43:22,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (63)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:22,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:22,935 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash 192642118, now seen corresponding path program 1 times [2022-11-16 11:43:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:22,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1511530708] [2022-11-16 11:43:22,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:22,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:22,938 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:22,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Waiting until timeout for monitored process [2022-11-16 11:43:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:23,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:43:23,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:43:23,120 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:23,120 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:23,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1511530708] [2022-11-16 11:43:23,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1511530708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:23,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:23,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:43:23,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243212363] [2022-11-16 11:43:23,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:23,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:43:23,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:23,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:43:23,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:23,122 INFO L87 Difference]: Start difference. First operand 440 states and 548 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:23,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:23,200 INFO L93 Difference]: Finished difference Result 490 states and 602 transitions. [2022-11-16 11:43:23,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:43:23,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2022-11-16 11:43:23,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:23,204 INFO L225 Difference]: With dead ends: 490 [2022-11-16 11:43:23,204 INFO L226 Difference]: Without dead ends: 490 [2022-11-16 11:43:23,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:23,205 INFO L413 NwaCegarLoop]: 376 mSDtfsCounter, 228 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1254 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:23,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1254 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:43:23,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-11-16 11:43:23,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 438. [2022-11-16 11:43:23,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 292 states have (on average 1.6746575342465753) internal successors, (489), 398 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2022-11-16 11:43:23,211 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 43 [2022-11-16 11:43:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:23,211 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2022-11-16 11:43:23,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2022-11-16 11:43:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:43:23,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:23,213 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, 1, 1, 1, 1, 1] [2022-11-16 11:43:23,224 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (64)] Ended with exit code 0 [2022-11-16 11:43:23,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:23,424 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:23,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380693, now seen corresponding path program 1 times [2022-11-16 11:43:23,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:23,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [940170301] [2022-11-16 11:43:23,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:23,426 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:23,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2022-11-16 11:43:23,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:43:23,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:23,711 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:23,712 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:23,855 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:23,855 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:24,065 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:24,066 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:24,343 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:24,387 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:24,423 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:43:24,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:24,645 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [940170301] [2022-11-16 11:43:24,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [940170301] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:24,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [913562974] [2022-11-16 11:43:24,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:24,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:43:24,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:43:24,646 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:43:24,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2022-11-16 11:43:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:24,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:43:24,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:24,981 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:25,061 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:25,062 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:25,240 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:25,240 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:25,750 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 11:43:25,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 11:43:26,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 30 [2022-11-16 11:43:26,860 INFO L321 Elim1Store]: treesize reduction 60, result has 27.7 percent of original size [2022-11-16 11:43:26,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 53 [2022-11-16 11:43:27,510 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-11-16 11:43:27,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2022-11-16 11:43:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:43:27,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:28,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [913562974] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:28,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:28,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 21 [2022-11-16 11:43:28,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142120701] [2022-11-16 11:43:28,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:28,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-16 11:43:28,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:28,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-16 11:43:28,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=737, Unknown=0, NotChecked=0, Total=992 [2022-11-16 11:43:28,364 INFO L87 Difference]: Start difference. First operand 438 states and 545 transitions. Second operand has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:43:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:31,860 INFO L93 Difference]: Finished difference Result 440 states and 548 transitions. [2022-11-16 11:43:31,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:43:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2022-11-16 11:43:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:31,863 INFO L225 Difference]: With dead ends: 440 [2022-11-16 11:43:31,863 INFO L226 Difference]: Without dead ends: 440 [2022-11-16 11:43:31,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=285, Invalid=904, Unknown=1, NotChecked=0, Total=1190 [2022-11-16 11:43:31,867 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 32 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 307 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:31,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1433 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 567 Invalid, 0 Unknown, 307 Unchecked, 1.3s Time] [2022-11-16 11:43:31,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-16 11:43:31,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-16 11:43:31,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6734693877551021) internal successors, (492), 400 states have internal predecessors, (492), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:31,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 548 transitions. [2022-11-16 11:43:31,872 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 548 transitions. Word has length 43 [2022-11-16 11:43:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:31,873 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 548 transitions. [2022-11-16 11:43:31,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.4) internal successors, (48), 17 states have internal predecessors, (48), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-16 11:43:31,873 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 548 transitions. [2022-11-16 11:43:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-16 11:43:31,873 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:31,874 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, 1, 1, 1, 1, 1] [2022-11-16 11:43:31,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:32,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:32,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:32,278 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1150380694, now seen corresponding path program 1 times [2022-11-16 11:43:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:32,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [602839788] [2022-11-16 11:43:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:32,279 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:32,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:32,280 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:32,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Waiting until timeout for monitored process [2022-11-16 11:43:32,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:32,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:43:32,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:34,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:34,605 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:36,821 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:43:36,821 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:41,184 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:43:41,185 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 22 [2022-11-16 11:43:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 2 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 11:43:41,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:42,928 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:42,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [602839788] [2022-11-16 11:43:42,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [602839788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:42,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1979119048] [2022-11-16 11:43:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:42,928 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:43:42,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:43:42,929 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:43:42,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2022-11-16 11:43:43,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:43,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-16 11:43:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:43,269 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:43,484 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:43:43,484 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:43,524 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:43,527 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:43,971 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:43:43,972 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:43,997 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:44,345 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:43:44,346 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:45,053 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:45,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 2 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-16 11:43:45,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:45,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-11-16 11:43:46,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1979119048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:43:46,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:46,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 23 [2022-11-16 11:43:46,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44401371] [2022-11-16 11:43:46,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:46,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-16 11:43:46,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:46,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-16 11:43:46,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=841, Unknown=18, NotChecked=0, Total=1056 [2022-11-16 11:43:46,962 INFO L87 Difference]: Start difference. First operand 440 states and 548 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 11:43:55,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:55,449 INFO L93 Difference]: Finished difference Result 440 states and 547 transitions. [2022-11-16 11:43:55,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-16 11:43:55,450 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 43 [2022-11-16 11:43:55,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:55,452 INFO L225 Difference]: With dead ends: 440 [2022-11-16 11:43:55,452 INFO L226 Difference]: Without dead ends: 440 [2022-11-16 11:43:55,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=329, Invalid=1454, Unknown=23, NotChecked=0, Total=1806 [2022-11-16 11:43:55,453 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 22 mSDsluCounter, 3489 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 3798 SdHoareTripleChecker+Invalid, 2296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 970 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:55,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 3798 Invalid, 2296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1317 Invalid, 0 Unknown, 970 Unchecked, 3.4s Time] [2022-11-16 11:43:55,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-11-16 11:43:55,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-11-16 11:43:55,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 294 states have (on average 1.6700680272108843) internal successors, (491), 400 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 547 transitions. [2022-11-16 11:43:55,460 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 547 transitions. Word has length 43 [2022-11-16 11:43:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:55,460 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 547 transitions. [2022-11-16 11:43:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 7 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 11:43:55,460 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 547 transitions. [2022-11-16 11:43:55,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:43:55,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:55,461 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, 1, 1, 1] [2022-11-16 11:43:55,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (68)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:55,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (67)] Forceful destruction successful, exit code 0 [2022-11-16 11:43:55,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:55,862 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:55,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:55,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659867, now seen corresponding path program 1 times [2022-11-16 11:43:55,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:55,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135706897] [2022-11-16 11:43:55,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:55,863 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:55,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Waiting until timeout for monitored process [2022-11-16 11:43:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:43:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:56,124 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:56,179 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:43:56,180 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:56,199 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:43:56,200 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:43:56,200 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:56,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135706897] [2022-11-16 11:43:56,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135706897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:56,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:56,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 11:43:56,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500462286] [2022-11-16 11:43:56,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:56,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:43:56,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:56,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:43:56,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:43:56,201 INFO L87 Difference]: Start difference. First operand 440 states and 547 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:56,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:56,836 INFO L93 Difference]: Finished difference Result 439 states and 546 transitions. [2022-11-16 11:43:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:43:56,837 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2022-11-16 11:43:56,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:56,839 INFO L225 Difference]: With dead ends: 439 [2022-11-16 11:43:56,840 INFO L226 Difference]: Without dead ends: 439 [2022-11-16 11:43:56,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:43:56,840 INFO L413 NwaCegarLoop]: 319 mSDtfsCounter, 14 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:56,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 724 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-16 11:43:56,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-11-16 11:43:56,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2022-11-16 11:43:56,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 294 states have (on average 1.6666666666666667) internal successors, (490), 399 states have internal predecessors, (490), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:43:56,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 546 transitions. [2022-11-16 11:43:56,862 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 546 transitions. Word has length 44 [2022-11-16 11:43:56,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:56,862 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 546 transitions. [2022-11-16 11:43:56,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-16 11:43:56,862 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 546 transitions. [2022-11-16 11:43:56,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 11:43:56,863 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:56,863 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, 1, 1, 1] [2022-11-16 11:43:56,880 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (69)] Ended with exit code 0 [2022-11-16 11:43:57,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:57,076 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:43:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:57,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1670659868, now seen corresponding path program 1 times [2022-11-16 11:43:57,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:43:57,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1684119982] [2022-11-16 11:43:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:57,077 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:43:57,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:43:57,078 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:43:57,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Waiting until timeout for monitored process [2022-11-16 11:43:57,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:57,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 11:43:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:43:57,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:43:57,426 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:57,444 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:43:57,445 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:43:57,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:43:57,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:43:57,797 INFO L350 Elim1Store]: Elim1 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 50 treesize of output 46 [2022-11-16 11:43:57,867 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:43:57,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2022-11-16 11:43:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:43:58,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:43:58,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1684119982] [2022-11-16 11:43:58,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1684119982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:43:58,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:43:58,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-11-16 11:43:58,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811363816] [2022-11-16 11:43:58,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:43:58,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 11:43:58,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:43:58,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 11:43:58,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:43:58,505 INFO L87 Difference]: Start difference. First operand 439 states and 546 transitions. Second operand has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 11:44:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:00,165 INFO L93 Difference]: Finished difference Result 438 states and 545 transitions. [2022-11-16 11:44:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 11:44:00,167 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 44 [2022-11-16 11:44:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:00,168 INFO L225 Difference]: With dead ends: 438 [2022-11-16 11:44:00,168 INFO L226 Difference]: Without dead ends: 438 [2022-11-16 11:44:00,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-16 11:44:00,169 INFO L413 NwaCegarLoop]: 311 mSDtfsCounter, 245 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:00,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1838 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 166 Unchecked, 1.6s Time] [2022-11-16 11:44:00,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-16 11:44:00,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 438. [2022-11-16 11:44:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 294 states have (on average 1.663265306122449) internal successors, (489), 398 states have internal predecessors, (489), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:44:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 545 transitions. [2022-11-16 11:44:00,175 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 545 transitions. Word has length 44 [2022-11-16 11:44:00,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:00,175 INFO L495 AbstractCegarLoop]: Abstraction has 438 states and 545 transitions. [2022-11-16 11:44:00,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 11:44:00,175 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 545 transitions. [2022-11-16 11:44:00,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:44:00,176 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:00,176 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, 1, 1, 1, 1] [2022-11-16 11:44:00,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (70)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:00,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:00,376 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:44:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash 248981415, now seen corresponding path program 1 times [2022-11-16 11:44:00,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378317162] [2022-11-16 11:44:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:00,377 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:00,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:00,378 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:44:00,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Waiting until timeout for monitored process [2022-11-16 11:44:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:44:00,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:44:01,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:44:01,409 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378317162] [2022-11-16 11:44:01,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378317162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:01,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:44:01,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:44:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657447569] [2022-11-16 11:44:01,410 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:44:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:01,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:44:01,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:01,411 INFO L87 Difference]: Start difference. First operand 438 states and 545 transitions. Second operand has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:44:01,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:01,763 INFO L93 Difference]: Finished difference Result 557 states and 619 transitions. [2022-11-16 11:44:01,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:44:01,763 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 45 [2022-11-16 11:44:01,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:01,766 INFO L225 Difference]: With dead ends: 557 [2022-11-16 11:44:01,766 INFO L226 Difference]: Without dead ends: 557 [2022-11-16 11:44:01,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:44:01,766 INFO L413 NwaCegarLoop]: 409 mSDtfsCounter, 303 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 2385 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:01,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 2385 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 147 Invalid, 0 Unknown, 189 Unchecked, 0.3s Time] [2022-11-16 11:44:01,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-11-16 11:44:01,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 440. [2022-11-16 11:44:01,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 296 states have (on average 1.6587837837837838) internal successors, (491), 400 states have internal predecessors, (491), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (32), 26 states have call predecessors, (32), 24 states have call successors, (32) [2022-11-16 11:44:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 547 transitions. [2022-11-16 11:44:01,776 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 547 transitions. Word has length 45 [2022-11-16 11:44:01,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:01,776 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 547 transitions. [2022-11-16 11:44:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:44:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 547 transitions. [2022-11-16 11:44:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:44:01,777 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:01,777 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:01,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (71)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:01,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:01,989 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:44:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262998, now seen corresponding path program 1 times [2022-11-16 11:44:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:01,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1486870911] [2022-11-16 11:44:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:01,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:01,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:01,991 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:44:01,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Waiting until timeout for monitored process [2022-11-16 11:44:02,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:02,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-16 11:44:02,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:02,360 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:44:02,360 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:44:02,594 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-16 11:44:02,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 20 treesize of output 22 [2022-11-16 11:44:02,788 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:02,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:44:02,798 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:03,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:44:03,277 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:05,393 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:05,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:05,681 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-16 11:44:05,681 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:05,927 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:05,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1486870911] [2022-11-16 11:44:05,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1486870911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:05,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821430622] [2022-11-16 11:44:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:05,928 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:44:05,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:44:05,929 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:44:05,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (73)] Waiting until timeout for monitored process [2022-11-16 11:44:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:06,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 11:44:06,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:08,653 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:44:08,654 INFO L350 Elim1Store]: Elim1 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 24 [2022-11-16 11:44:09,071 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:09,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-16 11:44:09,402 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:09,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 11:44:09,421 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 11:44:09,740 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:09,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-16 11:44:09,767 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 11:44:10,089 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:10,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:10,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2022-11-16 11:44:10,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:44:10,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:10,476 INFO L321 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2022-11-16 11:44:10,476 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:10,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821430622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:10,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:44:10,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2022-11-16 11:44:10,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881017848] [2022-11-16 11:44:10,690 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:10,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:44:10,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:10,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:44:10,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=956, Unknown=8, NotChecked=0, Total=1122 [2022-11-16 11:44:10,691 INFO L87 Difference]: Start difference. First operand 440 states and 547 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:44:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:19,905 INFO L93 Difference]: Finished difference Result 472 states and 581 transitions. [2022-11-16 11:44:19,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:44:19,907 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 45 [2022-11-16 11:44:19,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:19,909 INFO L225 Difference]: With dead ends: 472 [2022-11-16 11:44:19,909 INFO L226 Difference]: Without dead ends: 472 [2022-11-16 11:44:19,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=264, Invalid=1444, Unknown=14, NotChecked=0, Total=1722 [2022-11-16 11:44:19,909 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 338 mSDsluCounter, 3462 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 3775 SdHoareTripleChecker+Invalid, 2360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1039 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:19,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 3775 Invalid, 2360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1292 Invalid, 0 Unknown, 1039 Unchecked, 4.2s Time] [2022-11-16 11:44:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-16 11:44:19,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 458. [2022-11-16 11:44:19,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 314 states have (on average 1.6687898089171975) internal successors, (524), 418 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:44:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 579 transitions. [2022-11-16 11:44:19,916 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 579 transitions. Word has length 45 [2022-11-16 11:44:19,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:19,916 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 579 transitions. [2022-11-16 11:44:19,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 24 states have internal predecessors, (64), 8 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:44:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 579 transitions. [2022-11-16 11:44:19,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-16 11:44:19,917 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:19,917 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:44:19,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (72)] Ended with exit code 0 [2022-11-16 11:44:20,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (73)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:20,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:44:20,329 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:44:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:20,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1709262999, now seen corresponding path program 1 times [2022-11-16 11:44:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:20,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704702174] [2022-11-16 11:44:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:20,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:20,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:20,332 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:44:20,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Waiting until timeout for monitored process [2022-11-16 11:44:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-16 11:44:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:21,213 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:21,213 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:21,226 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:21,282 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:21,282 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:21,289 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:21,471 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:21,956 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:44:21,956 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 26 [2022-11-16 11:44:21,995 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:44:21,995 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 26 [2022-11-16 11:44:22,333 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:22,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 101 [2022-11-16 11:44:23,824 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:24,298 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:24,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 71 [2022-11-16 11:44:24,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:24,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2022-11-16 11:44:24,368 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:24,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 79 [2022-11-16 11:44:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:24,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:25,361 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:27,262 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:27,262 INFO L350 Elim1Store]: Elim1 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 137 treesize of output 141 [2022-11-16 11:44:28,486 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:28,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704702174] [2022-11-16 11:44:28,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704702174] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:28,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069850658] [2022-11-16 11:44:28,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:28,487 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:44:28,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:44:28,488 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:44:28,489 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2022-11-16 11:44:28,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-16 11:44:28,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:29,654 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:29,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 11:44:29,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:44:29,673 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 11:44:29,712 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:44:29,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:44:29,723 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:29,919 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:30,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:44:30,502 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:44:30,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 33 treesize of output 39 [2022-11-16 11:44:30,541 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:44:30,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2022-11-16 11:44:30,993 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:30,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 111 [2022-11-16 11:44:32,934 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:33,586 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:33,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 67 treesize of output 51 [2022-11-16 11:44:33,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:33,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 50 [2022-11-16 11:44:33,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:33,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 67 [2022-11-16 11:44:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 11:44:33,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:33,992 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:34,981 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:44:34,981 INFO L350 Elim1Store]: Elim1 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 137 treesize of output 141 [2022-11-16 11:44:35,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069850658] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:44:35,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:44:35,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-11-16 11:44:35,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885759450] [2022-11-16 11:44:35,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:35,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:44:35,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:35,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:44:35,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:44:35,867 INFO L87 Difference]: Start difference. First operand 458 states and 579 transitions. Second operand has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 11:44:39,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:39,325 INFO L93 Difference]: Finished difference Result 460 states and 581 transitions. [2022-11-16 11:44:39,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:44:39,326 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 45 [2022-11-16 11:44:39,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:39,327 INFO L225 Difference]: With dead ends: 460 [2022-11-16 11:44:39,327 INFO L226 Difference]: Without dead ends: 460 [2022-11-16 11:44:39,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=311, Invalid=2139, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:44:39,328 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 34 mSDsluCounter, 2098 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 2406 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:39,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 2406 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 328 Invalid, 0 Unknown, 778 Unchecked, 1.4s Time] [2022-11-16 11:44:39,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-16 11:44:39,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2022-11-16 11:44:39,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.6645569620253164) internal successors, (526), 420 states have internal predecessors, (526), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:44:39,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 581 transitions. [2022-11-16 11:44:39,333 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 581 transitions. Word has length 45 [2022-11-16 11:44:39,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:39,333 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 581 transitions. [2022-11-16 11:44:39,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 23 states have internal predecessors, (67), 7 states have call successors, (8), 5 states have call predecessors, (8), 7 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-16 11:44:39,333 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 581 transitions. [2022-11-16 11:44:39,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:44:39,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:39,334 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, 1, 1, 1, 1, 1] [2022-11-16 11:44:39,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (74)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:39,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (75)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:39,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:44:39,735 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:44:39,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:39,735 INFO L85 PathProgramCache]: Analyzing trace with hash -871510309, now seen corresponding path program 1 times [2022-11-16 11:44:39,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1703664825] [2022-11-16 11:44:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:39,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:39,736 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:44:39,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Waiting until timeout for monitored process [2022-11-16 11:44:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:39,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:44:39,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:39,937 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:40,063 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:44:40,063 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:40,186 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:44:40,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-16 11:44:40,614 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:44:40,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1703664825] [2022-11-16 11:44:40,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1703664825] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:44:40,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:44:40,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-11-16 11:44:40,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453997327] [2022-11-16 11:44:40,615 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:44:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-16 11:44:40,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:44:40,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-16 11:44:40,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:44:40,617 INFO L87 Difference]: Start difference. First operand 460 states and 581 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 11:44:42,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:44:42,909 INFO L93 Difference]: Finished difference Result 512 states and 593 transitions. [2022-11-16 11:44:42,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:44:42,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 46 [2022-11-16 11:44:42,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:44:42,916 INFO L225 Difference]: With dead ends: 512 [2022-11-16 11:44:42,917 INFO L226 Difference]: Without dead ends: 512 [2022-11-16 11:44:42,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-11-16 11:44:42,917 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 160 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1489 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:44:42,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1489 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 952 Invalid, 0 Unknown, 273 Unchecked, 2.2s Time] [2022-11-16 11:44:42,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-11-16 11:44:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 460. [2022-11-16 11:44:42,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 316 states have (on average 1.6613924050632911) internal successors, (525), 420 states have internal predecessors, (525), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:44:42,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 580 transitions. [2022-11-16 11:44:42,931 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 580 transitions. Word has length 46 [2022-11-16 11:44:42,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:44:42,931 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 580 transitions. [2022-11-16 11:44:42,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 3 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 11:44:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 580 transitions. [2022-11-16 11:44:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:44:42,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:44:42,932 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, 1, 1, 1, 1, 1] [2022-11-16 11:44:42,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (76)] Forceful destruction successful, exit code 0 [2022-11-16 11:44:43,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:43,135 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:44:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:44:43,135 INFO L85 PathProgramCache]: Analyzing trace with hash -813633540, now seen corresponding path program 1 times [2022-11-16 11:44:43,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:44:43,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918630910] [2022-11-16 11:44:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:44:43,136 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:44:43,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:44:43,136 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:44:43,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Waiting until timeout for monitored process [2022-11-16 11:44:43,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:44:43,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-16 11:44:43,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:44:43,409 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:43,517 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:44:43,517 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:43,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:44:45,636 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_89| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_89| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_89|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_39|)))) is different from true [2022-11-16 11:44:45,647 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:44:45,743 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:44:45,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-16 11:44:45,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-16 11:44:49,874 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1356 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1356)))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_40| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_90|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_40|))))) is different from true [2022-11-16 11:44:49,935 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-16 11:44:49,935 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 35 [2022-11-16 11:44:50,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-16 11:44:50,090 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:44:54,293 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-16 11:44:54,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-16 11:44:54,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2022-11-16 11:44:54,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-16 11:44:54,626 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-16 11:44:54,626 INFO L350 Elim1Store]: Elim1 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 25 treesize of output 36 [2022-11-16 11:44:54,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-16 11:44:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-11-16 11:44:54,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:44:55,192 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1362 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1362) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-16 11:44:57,206 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1362 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32)) (v_ArrVal_1360 (_ BitVec 32))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1360)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1362) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)))) is different from false [2022-11-16 11:44:59,230 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1362 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ BitVec 32)) (v_ArrVal_1360 (_ BitVec 32))) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_12| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) v_ArrVal_1360)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1362) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2022-11-16 11:45:05,859 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:45:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918630910] [2022-11-16 11:45:05,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918630910] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142782325] [2022-11-16 11:45:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:45:05,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:45:05,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:45:05,860 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:45:05,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (78)] Waiting until timeout for monitored process [2022-11-16 11:45:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:45:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-16 11:45:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:45:06,421 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:45:06,738 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:45:06,738 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:45:06,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:45:09,011 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_93| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_93| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_93|) (_ bv0 32))))) is different from true [2022-11-16 11:45:09,184 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:45:09,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-11-16 11:45:09,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-16 11:45:15,442 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1413 (_ BitVec 1)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1413) |c_#valid|))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_94|) (_ bv0 32)))))) is different from true [2022-11-16 11:45:15,502 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-16 11:45:15,503 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 35 [2022-11-16 11:45:15,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:45:15,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 28 [2022-11-16 11:45:15,808 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:45:22,250 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-16 11:45:22,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-16 11:45:22,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:45:22,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 32 [2022-11-16 11:45:22,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-16 11:45:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:45:23,275 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-16 11:45:23,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 48 [2022-11-16 11:45:23,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-16 11:45:24,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 20 not checked. [2022-11-16 11:45:24,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:45:26,799 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1419 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| (_ BitVec 32))) (or (= (bvadd (_ bv1 1) (select (store |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1419) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (_ bv0 1)) (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_13|)))) is different from false [2022-11-16 11:45:55,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142782325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:45:55,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:45:55,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2022-11-16 11:45:55,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368860033] [2022-11-16 11:45:55,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:45:55,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:45:55,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:45:55,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:45:55,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1782, Unknown=28, NotChecked=744, Total=2756 [2022-11-16 11:45:55,798 INFO L87 Difference]: Start difference. First operand 460 states and 580 transitions. Second operand has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 11:46:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:46:17,587 INFO L93 Difference]: Finished difference Result 463 states and 584 transitions. [2022-11-16 11:46:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:46:17,589 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 46 [2022-11-16 11:46:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:46:17,596 INFO L225 Difference]: With dead ends: 463 [2022-11-16 11:46:17,597 INFO L226 Difference]: Without dead ends: 463 [2022-11-16 11:46:17,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 51 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 87.2s TimeCoverageRelationStatistics Valid=246, Invalid=2110, Unknown=28, NotChecked=808, Total=3192 [2022-11-16 11:46:17,598 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 58 mSDsluCounter, 3563 mSDsCounter, 0 mSdLazyCounter, 1254 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3840 SdHoareTripleChecker+Invalid, 3274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1999 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:46:17,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3840 Invalid, 3274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1254 Invalid, 0 Unknown, 1999 Unchecked, 4.3s Time] [2022-11-16 11:46:17,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-16 11:46:17,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 459. [2022-11-16 11:46:17,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 316 states have (on average 1.6582278481012658) internal successors, (524), 419 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:46:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 579 transitions. [2022-11-16 11:46:17,605 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 579 transitions. Word has length 46 [2022-11-16 11:46:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:46:17,605 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 579 transitions. [2022-11-16 11:46:17,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.736842105263158) internal successors, (66), 34 states have internal predecessors, (66), 9 states have call successors, (9), 6 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 11:46:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 579 transitions. [2022-11-16 11:46:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-16 11:46:17,606 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:46:17,606 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, 1, 1, 1, 1, 1] [2022-11-16 11:46:17,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (78)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:17,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (77)] Forceful destruction successful, exit code 0 [2022-11-16 11:46:18,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:46:18,011 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:46:18,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:46:18,011 INFO L85 PathProgramCache]: Analyzing trace with hash -813633539, now seen corresponding path program 1 times [2022-11-16 11:46:18,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:46:18,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1965941465] [2022-11-16 11:46:18,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:46:18,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:46:18,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:46:18,013 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:46:18,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Waiting until timeout for monitored process [2022-11-16 11:46:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:46:18,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 79 conjunts are in the unsatisfiable core [2022-11-16 11:46:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:46:18,300 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:46:18,427 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:46:18,541 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:46:18,541 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:46:18,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:46:18,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:46:18,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 11:46:18,932 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:46:19,046 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97|) (_ bv0 32)))) (and (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97| .cse0)) (bvult .cse0 |c_#StackHeapBarrier|) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97|) (_ bv0 32)) (_ bv0 32))))) (exists ((v_ArrVal_1471 (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1471) |c_#length|)))) is different from true [2022-11-16 11:46:19,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:19,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:46:19,138 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 11:46:19,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:46:19,373 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:46:19,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2022-11-16 11:46:19,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:46:19,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 11:46:19,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2022-11-16 11:46:19,612 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97| (_ BitVec 32))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97|) (_ bv0 32)))) (and (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97| .cse0)) (bvult .cse0 |c_#StackHeapBarrier|) (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_97|) (_ bv0 32)) (_ bv0 32))))) (exists ((v_ArrVal_1474 (_ BitVec 1)) (v_ArrVal_1475 (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1475) |c_#length|) (= (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1474) |c_#valid|)))) is different from true [2022-11-16 11:46:19,720 INFO L321 Elim1Store]: treesize reduction 34, result has 37.0 percent of original size [2022-11-16 11:46:19,720 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 35 [2022-11-16 11:46:19,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:19,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:46:19,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:19,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-16 11:46:20,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 11:46:20,072 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:46:20,393 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 11:46:20,394 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-16 11:46:20,471 INFO L321 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-11-16 11:46:20,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 26 [2022-11-16 11:46:20,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:20,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:46:20,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:20,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 33 [2022-11-16 11:46:20,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2022-11-16 11:46:20,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-16 11:46:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:46:21,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:46:21,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 20 [2022-11-16 11:46:21,315 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:46:21,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 14 [2022-11-16 11:46:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 14 not checked. [2022-11-16 11:46:21,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:09,962 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:47:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1965941465] [2022-11-16 11:47:09,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1965941465] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:09,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1645658175] [2022-11-16 11:47:09,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:09,963 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:47:09,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:47:09,964 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:47:09,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (80)] Waiting until timeout for monitored process [2022-11-16 11:47:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:10,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-16 11:47:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:10,582 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:10,637 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:10,908 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:47:10,908 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:11,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:47:11,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:47:11,678 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:47:11,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 11:47:11,930 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1542 (_ BitVec 1)) (v_ArrVal_1541 (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= |c_#valid| (store |c_old(#valid)| |ldv_malloc_#res.base| v_ArrVal_1542)) (= (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1541) |c_#length|))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101| (_ BitVec 32))) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101|) (_ bv0 32)) (_ bv0 32)) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101|) (_ bv0 32))))))) is different from true [2022-11-16 11:47:12,055 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 11:47:12,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 11:47:12,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-16 11:47:12,428 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-16 11:47:12,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 46 [2022-11-16 11:47:12,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:47:12,691 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-16 11:47:12,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-11-16 11:47:12,932 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_1545 (_ BitVec 32)) (|ldv_malloc_#res.base| (_ BitVec 32))) (and (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_1545)) (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|))) (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101| (_ BitVec 32))) (and (= (select (select |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101|) (_ bv0 32)) (_ bv0 32)) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_101|) (_ bv0 32))))))) is different from true [2022-11-16 11:47:13,068 INFO L321 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2022-11-16 11:47:13,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2022-11-16 11:47:13,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:13,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:13,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:47:13,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:13,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 37 [2022-11-16 11:47:13,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:47:13,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-16 11:47:16,156 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-16 11:47:16,157 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 16 treesize of output 26 [2022-11-16 11:47:16,309 INFO L321 Elim1Store]: treesize reduction 78, result has 35.0 percent of original size [2022-11-16 11:47:16,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 67 [2022-11-16 11:47:17,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:17,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:47:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:17,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 41 [2022-11-16 11:47:17,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-11-16 11:47:17,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-16 11:47:17,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:17,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-16 11:47:18,086 INFO L321 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-11-16 11:47:18,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-11-16 11:47:18,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-16 11:47:18,483 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-16 11:47:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 14 not checked. [2022-11-16 11:47:18,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:28,471 WARN L833 $PredicateComparison]: unable to prove that (and (or (forall ((v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (not (= (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|) (_ bv0 1)))))) (forall ((v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1558 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (forall ((v_ArrVal_1559 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| v_ArrVal_1559) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1558) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))) (not (= (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|) (_ bv0 1)))))) is different from false [2022-11-16 11:47:28,535 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|)) (.cse1 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (and (forall ((v_ArrVal_1554 (_ BitVec 32)) (v_ArrVal_1553 (_ BitVec 32)) (v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1558 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (not (= (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|) (_ bv0 1))) (forall ((v_ArrVal_1559 (_ BitVec 32))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store .cse0 .cse1 v_ArrVal_1554)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|) (_ bv4 32)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| v_ArrVal_1559) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1553)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1558) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))))) (or (forall ((v_ArrVal_1554 (_ BitVec 32)) (v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store .cse0 .cse1 v_ArrVal_1554)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse2 (bvadd .cse2 (_ bv4 32))))) (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (not (= (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|) (_ bv0 1)))))))) is different from false [2022-11-16 11:47:28,641 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|)) (.cse1 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (and (forall ((v_ArrVal_1554 (_ BitVec 32)) (v_ArrVal_1553 (_ BitVec 32)) (v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1558 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (forall ((v_ArrVal_1559 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store .cse0 .cse1 v_ArrVal_1554)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| v_ArrVal_1559) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse1 v_ArrVal_1553)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1558) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))) (not (= (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|) (_ bv0 1))))) (or (forall ((v_ArrVal_1554 (_ BitVec 32)) (v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store .cse0 .cse1 v_ArrVal_1554)) |c_ULTIMATE.start_entry_point_#t~ret69#1.base| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse2 (bvadd (_ bv4 32) .cse2)))) (forall ((|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (bvult |c_#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)) (not (= (select |c_#valid| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|) (_ bv0 1)))))))) is different from false [2022-11-16 11:47:29,016 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base|)) (.cse2 (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)))) (and (forall ((|v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| (_ BitVec 32))) (or (forall ((|#StackHeapBarrier| (_ BitVec 32)) (v_ArrVal_1564 (_ BitVec 1)) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| v_ArrVal_1564) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|))) (not (bvult |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| |#StackHeapBarrier|)) (not (bvult |#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)))) (forall ((v_ArrVal_1554 (_ BitVec 32)) (v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store .cse1 .cse2 v_ArrVal_1554)) |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40|) (_ bv0 1))))) (forall ((|v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| (_ BitVec 32))) (or (forall ((|#StackHeapBarrier| (_ BitVec 32))) (or (forall ((v_ArrVal_1565 (_ BitVec 32)) (v_ArrVal_1554 (_ BitVec 32)) (v_ArrVal_1553 (_ BitVec 32)) (v_ArrVal_1564 (_ BitVec 1)) (v_ArrVal_1557 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1558 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| (_ BitVec 32))) (or (not (= (_ bv0 1) (select (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| v_ArrVal_1564) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|))) (forall ((v_ArrVal_1559 (_ BitVec 32))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store .cse1 .cse2 v_ArrVal_1554)) |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| v_ArrVal_1557) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (select (store (store |c_#length| |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| v_ArrVal_1565) |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15| v_ArrVal_1559) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) .cse2 v_ArrVal_1553)) |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| v_ArrVal_1558) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)))) (not (bvult |#StackHeapBarrier| |v_ULTIMATE.start_alloc_fix_12_~#chip_id~0#1.base_15|)))) (not (bvult |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40| |#StackHeapBarrier|)))) (not (= (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret69#1.base_40|) (_ bv0 1))))))) is different from false [2022-11-16 11:47:29,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1645658175] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:29,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:47:29,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2022-11-16 11:47:29,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562347982] [2022-11-16 11:47:29,026 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:29,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-16 11:47:29,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:47:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-16 11:47:29,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1795, Unknown=41, NotChecked=744, Total=2756 [2022-11-16 11:47:29,027 INFO L87 Difference]: Start difference. First operand 459 states and 579 transitions. Second operand has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 34 states have internal predecessors, (60), 8 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-16 11:47:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:42,121 INFO L93 Difference]: Finished difference Result 462 states and 583 transitions. [2022-11-16 11:47:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:47:42,122 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 34 states have internal predecessors, (60), 8 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 46 [2022-11-16 11:47:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:42,124 INFO L225 Difference]: With dead ends: 462 [2022-11-16 11:47:42,124 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 11:47:42,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 58 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=257, Invalid=2386, Unknown=41, NotChecked=856, Total=3540 [2022-11-16 11:47:42,125 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 75 mSDsluCounter, 2762 mSDsCounter, 0 mSdLazyCounter, 1835 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 3032 SdHoareTripleChecker+Invalid, 4047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2192 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:42,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 3032 Invalid, 4047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1835 Invalid, 0 Unknown, 2192 Unchecked, 7.0s Time] [2022-11-16 11:47:42,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 11:47:42,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-11-16 11:47:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 316 states have (on average 1.6550632911392404) internal successors, (523), 418 states have internal predecessors, (523), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:47:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 578 transitions. [2022-11-16 11:47:42,135 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 578 transitions. Word has length 46 [2022-11-16 11:47:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:42,135 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 578 transitions. [2022-11-16 11:47:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 34 states have internal predecessors, (60), 8 states have call successors, (8), 4 states have call predecessors, (8), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-16 11:47:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 578 transitions. [2022-11-16 11:47:42,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:47:42,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:42,137 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, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:42,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (80)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:42,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (79)] Forceful destruction successful, exit code 0 [2022-11-16 11:47:42,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:47:42,543 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:47:42,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:42,543 INFO L85 PathProgramCache]: Analyzing trace with hash -2770755, now seen corresponding path program 1 times [2022-11-16 11:47:42,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:47:42,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173993046] [2022-11-16 11:47:42,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:42,544 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:47:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:47:42,545 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:47:42,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Waiting until timeout for monitored process [2022-11-16 11:47:42,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:42,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:47:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-16 11:47:43,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:47:43,798 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:47:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173993046] [2022-11-16 11:47:43,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173993046] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:47:43,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:47:43,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:47:43,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026480393] [2022-11-16 11:47:43,798 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:47:43,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:47:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:47:43,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:47:43,800 INFO L87 Difference]: Start difference. First operand 458 states and 578 transitions. Second operand has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:47:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:47:44,206 INFO L93 Difference]: Finished difference Result 575 states and 649 transitions. [2022-11-16 11:47:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:47:44,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) Word has length 48 [2022-11-16 11:47:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:47:44,208 INFO L225 Difference]: With dead ends: 575 [2022-11-16 11:47:44,209 INFO L226 Difference]: Without dead ends: 575 [2022-11-16 11:47:44,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:47:44,209 INFO L413 NwaCegarLoop]: 404 mSDtfsCounter, 304 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 2567 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:47:44,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 2567 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 156 Invalid, 0 Unknown, 189 Unchecked, 0.4s Time] [2022-11-16 11:47:44,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-11-16 11:47:44,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 458. [2022-11-16 11:47:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 316 states have (on average 1.6518987341772151) internal successors, (522), 418 states have internal predecessors, (522), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:47:44,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 577 transitions. [2022-11-16 11:47:44,218 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 577 transitions. Word has length 48 [2022-11-16 11:47:44,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:47:44,218 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 577 transitions. [2022-11-16 11:47:44,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.666666666666667) internal successors, (60), 8 states have internal predecessors, (60), 5 states have call successors, (10), 3 states have call predecessors, (10), 4 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 11:47:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 577 transitions. [2022-11-16 11:47:44,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-16 11:47:44,219 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:47:44,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:47:44,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (81)] Ended with exit code 0 [2022-11-16 11:47:44,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:47:44,427 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:47:44,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:47:44,428 INFO L85 PathProgramCache]: Analyzing trace with hash -477908374, now seen corresponding path program 1 times [2022-11-16 11:47:44,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:47:44,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366562622] [2022-11-16 11:47:44,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:44,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:47:44,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:47:44,429 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:47:44,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Waiting until timeout for monitored process [2022-11-16 11:47:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:47:44,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:44,885 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:47:44,885 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:47:45,204 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-16 11:47:45,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:47:45,441 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:47:45,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:47:45,452 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:45,502 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:47:45,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:47:45,513 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:45,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:47:45,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-16 11:47:46,251 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:48,454 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:48,462 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:48,483 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:47:48,483 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:47:48,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:48,868 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:49,255 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:47:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366562622] [2022-11-16 11:47:49,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366562622] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:49,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [193243236] [2022-11-16 11:47:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:47:49,256 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:47:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:47:49,256 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:47:49,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (83)] Waiting until timeout for monitored process [2022-11-16 11:47:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:47:49,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:47:49,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:47:52,126 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:47:52,126 INFO L350 Elim1Store]: Elim1 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 24 [2022-11-16 11:47:52,656 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:47:52,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-16 11:47:53,024 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:47:53,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:47:53,038 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:53,082 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:47:53,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 11:47:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:53,100 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 11:47:53,519 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:47:53,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:47:53,557 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:47:53,557 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-16 11:47:53,574 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 11:47:54,153 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:54,426 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:47:54,426 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:54,433 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:54,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:47:54,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-11-16 11:47:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 2 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 11:47:54,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:47:54,765 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:47:55,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [193243236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:47:55,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:47:55,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 29 [2022-11-16 11:47:55,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199713129] [2022-11-16 11:47:55,062 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:47:55,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:47:55,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:47:55,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:47:55,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1003, Unknown=9, NotChecked=0, Total=1190 [2022-11-16 11:47:55,063 INFO L87 Difference]: Start difference. First operand 458 states and 577 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 25 states have internal predecessors, (73), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:48:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:06,574 INFO L93 Difference]: Finished difference Result 475 states and 582 transitions. [2022-11-16 11:48:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:48:06,575 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 25 states have internal predecessors, (73), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 48 [2022-11-16 11:48:06,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:06,577 INFO L225 Difference]: With dead ends: 475 [2022-11-16 11:48:06,577 INFO L226 Difference]: Without dead ends: 475 [2022-11-16 11:48:06,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=300, Invalid=1577, Unknown=15, NotChecked=0, Total=1892 [2022-11-16 11:48:06,577 INFO L413 NwaCegarLoop]: 314 mSDtfsCounter, 576 mSDsluCounter, 3373 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 3687 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 323 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:06,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 3687 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1631 Invalid, 0 Unknown, 323 Unchecked, 6.1s Time] [2022-11-16 11:48:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-11-16 11:48:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 460. [2022-11-16 11:48:06,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 318 states have (on average 1.6477987421383649) internal successors, (524), 420 states have internal predecessors, (524), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:48:06,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 579 transitions. [2022-11-16 11:48:06,584 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 579 transitions. Word has length 48 [2022-11-16 11:48:06,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:06,584 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 579 transitions. [2022-11-16 11:48:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 25 states have internal predecessors, (73), 8 states have call successors, (8), 4 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:48:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 579 transitions. [2022-11-16 11:48:06,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-16 11:48:06,585 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:06,585 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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:06,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (83)] Ended with exit code 0 [2022-11-16 11:48:06,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (82)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:06,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:48:06,998 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:48:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -85892980, now seen corresponding path program 1 times [2022-11-16 11:48:06,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:48:06,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782374985] [2022-11-16 11:48:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:48:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:48:07,010 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:48:07,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Waiting until timeout for monitored process [2022-11-16 11:48:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:48:07,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:07,293 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:48:07,398 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:48:07,398 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:48:07,599 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:48:07,599 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:48:07,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:48:07,838 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:48:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:48:07,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:08,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:48:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782374985] [2022-11-16 11:48:08,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782374985] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:08,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1422855626] [2022-11-16 11:48:08,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:08,320 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:48:08,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:48:08,321 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:48:08,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (85)] Waiting until timeout for monitored process [2022-11-16 11:48:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:08,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:48:08,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:08,715 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:48:08,759 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:48:08,759 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:48:08,864 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:48:08,864 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:48:08,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:48:09,011 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:48:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 11:48:09,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:09,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1422855626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:09,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:48:09,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2022-11-16 11:48:09,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140795354] [2022-11-16 11:48:09,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:48:09,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-16 11:48:09,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:48:09,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-16 11:48:09,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=167, Unknown=1, NotChecked=0, Total=210 [2022-11-16 11:48:09,457 INFO L87 Difference]: Start difference. First operand 460 states and 579 transitions. Second operand has 13 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 11:48:11,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:48:11,828 INFO L93 Difference]: Finished difference Result 472 states and 586 transitions. [2022-11-16 11:48:11,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 11:48:11,830 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2022-11-16 11:48:11,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:48:11,831 INFO L225 Difference]: With dead ends: 472 [2022-11-16 11:48:11,831 INFO L226 Difference]: Without dead ends: 472 [2022-11-16 11:48:11,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=191, Unknown=1, NotChecked=0, Total=240 [2022-11-16 11:48:11,831 INFO L413 NwaCegarLoop]: 277 mSDtfsCounter, 89 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1912 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:48:11,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1912 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 854 Invalid, 0 Unknown, 198 Unchecked, 2.3s Time] [2022-11-16 11:48:11,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-11-16 11:48:11,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 460. [2022-11-16 11:48:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 318 states have (on average 1.6446540880503144) internal successors, (523), 420 states have internal predecessors, (523), 24 states have call successors, (24), 17 states have call predecessors, (24), 21 states have return successors, (31), 26 states have call predecessors, (31), 24 states have call successors, (31) [2022-11-16 11:48:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 578 transitions. [2022-11-16 11:48:11,837 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 578 transitions. Word has length 49 [2022-11-16 11:48:11,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:48:11,837 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 578 transitions. [2022-11-16 11:48:11,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0) internal successors, (36), 10 states have internal predecessors, (36), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-16 11:48:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 578 transitions. [2022-11-16 11:48:11,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-16 11:48:11,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:48:11,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:48:11,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (84)] Forceful destruction successful, exit code 0 [2022-11-16 11:48:12,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (85)] Ended with exit code 0 [2022-11-16 11:48:12,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:48:12,243 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:48:12,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:48:12,244 INFO L85 PathProgramCache]: Analyzing trace with hash 291532103, now seen corresponding path program 1 times [2022-11-16 11:48:12,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:48:12,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855084877] [2022-11-16 11:48:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:12,244 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:48:12,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:48:12,246 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:48:12,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Waiting until timeout for monitored process [2022-11-16 11:48:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:12,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-16 11:48:12,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:23,890 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (exists ((v_ArrVal_1739 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~2#1.base| (_ BitVec 32)) (v_ArrVal_1745 (_ BitVec 1))) (let ((.cse0 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_1739))) (let ((.cse1 (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| v_ArrVal_1745))) (and (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= |c_#valid| (store (store (store .cse1 |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (select .cse1 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv0 1)))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2022-11-16 11:48:24,078 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:48:24,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:28,825 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret67#1.base_99| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret67#1.base_99|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret67#1.base_99| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))))) is different from false [2022-11-16 11:48:28,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:48:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855084877] [2022-11-16 11:48:28,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855084877] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:48:28,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1830012478] [2022-11-16 11:48:28,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:48:28,829 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:48:28,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:48:28,829 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:48:28,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (87)] Waiting until timeout for monitored process [2022-11-16 11:48:29,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:48:29,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-16 11:48:29,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:48:56,185 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~fe~2#1.base| (_ BitVec 32)) (v_ArrVal_1778 (_ BitVec 1)) (v_ArrVal_1777 (_ BitVec 1))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_1778))) (let ((.cse0 (store .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base| v_ArrVal_1777))) (let ((.cse3 (store .cse0 |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 1)))) (let ((.cse2 (store .cse3 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (_ bv0 1) (select .cse0 |ULTIMATE.start_entry_point_~fe~2#1.base|)) (= (_ bv0 1) (select .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= (store .cse2 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (bvadd (_ bv1 1) (select .cse3 |ULTIMATE.start_entry_point_~cfg~2#1.base|))) (= (_ bv0 1) (bvadd (select .cse2 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1))) (not (= |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 32))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))))))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-11-16 11:48:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:48:56,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:48:57,967 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-16 11:48:58,006 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2022-11-16 11:49:04,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1830012478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:04,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:04,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17] total 28 [2022-11-16 11:49:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118828081] [2022-11-16 11:49:04,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:04,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-16 11:49:04,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:49:04,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-16 11:49:04,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1290, Unknown=24, NotChecked=228, Total=1722 [2022-11-16 11:49:04,250 INFO L87 Difference]: Start difference. First operand 460 states and 578 transitions. Second operand has 29 states, 25 states have (on average 2.6) internal successors, (65), 23 states have internal predecessors, (65), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:49:16,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:16,490 INFO L93 Difference]: Finished difference Result 469 states and 587 transitions. [2022-11-16 11:49:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-16 11:49:16,492 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 25 states have (on average 2.6) internal successors, (65), 23 states have internal predecessors, (65), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-11-16 11:49:16,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:16,493 INFO L225 Difference]: With dead ends: 469 [2022-11-16 11:49:16,493 INFO L226 Difference]: Without dead ends: 447 [2022-11-16 11:49:16,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 110 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 4 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 58.6s TimeCoverageRelationStatistics Valid=194, Invalid=1514, Unknown=26, NotChecked=246, Total=1980 [2022-11-16 11:49:16,494 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 56 mSDsluCounter, 2145 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1800 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:16,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2415 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 394 Invalid, 0 Unknown, 1800 Unchecked, 1.5s Time] [2022-11-16 11:49:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-16 11:49:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2022-11-16 11:49:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6754966887417218) internal successors, (506), 404 states have internal predecessors, (506), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 11:49:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 560 transitions. [2022-11-16 11:49:16,514 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 560 transitions. Word has length 50 [2022-11-16 11:49:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:16,515 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 560 transitions. [2022-11-16 11:49:16,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 25 states have (on average 2.6) internal successors, (65), 23 states have internal predecessors, (65), 8 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 11:49:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 560 transitions. [2022-11-16 11:49:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-16 11:49:16,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:16,515 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:16,524 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (87)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:16,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (86)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:16,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:49:16,916 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:49:16,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:16,917 INFO L85 PathProgramCache]: Analyzing trace with hash 963166306, now seen corresponding path program 1 times [2022-11-16 11:49:16,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:49:16,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366651551] [2022-11-16 11:49:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:16,917 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:49:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:49:16,918 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:49:16,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Waiting until timeout for monitored process [2022-11-16 11:49:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:17,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:49:17,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:17,145 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:17,305 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:49:17,305 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:17,485 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:49:17,485 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:17,681 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:17,967 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:49:17,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:49:18,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-16 11:49:18,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:49:18,368 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:49:18,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:19,092 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:19,446 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 22 [2022-11-16 11:49:20,205 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:49:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366651551] [2022-11-16 11:49:20,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366651551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [447236244] [2022-11-16 11:49:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:20,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:49:20,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:49:20,207 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:49:20,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (89)] Waiting until timeout for monitored process [2022-11-16 11:49:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:20,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:49:20,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:20,639 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:20,698 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:49:20,699 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:20,762 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:49:20,762 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:20,815 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:20,903 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:49:20,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-16 11:49:21,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-16 11:49:21,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:49:21,097 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:21,107 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:49:21,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:21,671 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:22,165 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 22 [2022-11-16 11:49:23,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [447236244] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:23,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:23,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2022-11-16 11:49:23,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815041451] [2022-11-16 11:49:23,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:23,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-16 11:49:23,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:49:23,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-16 11:49:23,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 11:49:23,024 INFO L87 Difference]: Start difference. First operand 443 states and 560 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:49:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:30,879 INFO L93 Difference]: Finished difference Result 495 states and 572 transitions. [2022-11-16 11:49:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:49:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2022-11-16 11:49:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:30,881 INFO L225 Difference]: With dead ends: 495 [2022-11-16 11:49:30,881 INFO L226 Difference]: Without dead ends: 495 [2022-11-16 11:49:30,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 126 SyntacticMatches, 8 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=168, Invalid=1238, Unknown=0, NotChecked=0, Total=1406 [2022-11-16 11:49:30,882 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 582 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 2426 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 2917 SdHoareTripleChecker+Invalid, 2497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:30,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 2917 Invalid, 2497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2426 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-11-16 11:49:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-11-16 11:49:30,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 443. [2022-11-16 11:49:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6721854304635762) internal successors, (505), 404 states have internal predecessors, (505), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 11:49:30,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 559 transitions. [2022-11-16 11:49:30,890 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 559 transitions. Word has length 52 [2022-11-16 11:49:30,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:30,890 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 559 transitions. [2022-11-16 11:49:30,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-16 11:49:30,891 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 559 transitions. [2022-11-16 11:49:30,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 11:49:30,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:30,891 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:30,897 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (89)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:31,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (88)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:49:31,292 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:49:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -2110101979, now seen corresponding path program 1 times [2022-11-16 11:49:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:49:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1859386294] [2022-11-16 11:49:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:31,293 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:49:31,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:49:31,294 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:49:31,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Waiting until timeout for monitored process [2022-11-16 11:49:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:31,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-16 11:49:31,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:31,690 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:31,690 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:31,876 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:31,876 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:32,132 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:32,132 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:32,477 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 11:49:32,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 11:49:33,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 32 [2022-11-16 11:49:33,117 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 21 treesize of output 25 [2022-11-16 11:49:33,188 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:33,231 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 11:49:33,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:33,647 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:49:33,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1859386294] [2022-11-16 11:49:33,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1859386294] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:33,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1354419971] [2022-11-16 11:49:33,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:33,648 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:49:33,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:49:33,649 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:49:33,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2022-11-16 11:49:34,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:34,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-16 11:49:34,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:34,171 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:34,335 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:34,336 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:34,670 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:34,671 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:35,336 INFO L321 Elim1Store]: treesize reduction 44, result has 34.3 percent of original size [2022-11-16 11:49:35,337 INFO L350 Elim1Store]: Elim1 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 4 case distinctions, treesize of input 26 treesize of output 43 [2022-11-16 11:49:36,404 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:36,763 INFO L321 Elim1Store]: treesize reduction 76, result has 30.9 percent of original size [2022-11-16 11:49:36,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 33 treesize of output 59 [2022-11-16 11:49:37,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-16 11:49:38,740 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:49:38,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 42 [2022-11-16 11:49:39,699 INFO L321 Elim1Store]: treesize reduction 80, result has 22.3 percent of original size [2022-11-16 11:49:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 40 treesize of output 65 [2022-11-16 11:49:40,979 INFO L321 Elim1Store]: treesize reduction 100, result has 25.4 percent of original size [2022-11-16 11:49:40,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38 treesize of output 67 [2022-11-16 11:49:42,127 INFO L321 Elim1Store]: treesize reduction 96, result has 26.2 percent of original size [2022-11-16 11:49:42,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 67 [2022-11-16 11:49:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:49:42,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:49:44,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1354419971] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:49:44,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:49:44,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 27] total 36 [2022-11-16 11:49:44,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049997720] [2022-11-16 11:49:44,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:49:44,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-16 11:49:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:49:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-16 11:49:44,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1944, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:49:44,043 INFO L87 Difference]: Start difference. First operand 443 states and 559 transitions. Second operand has 38 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 9 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 11:49:54,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:49:54,148 INFO L93 Difference]: Finished difference Result 462 states and 569 transitions. [2022-11-16 11:49:54,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:49:54,150 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 9 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) Word has length 54 [2022-11-16 11:49:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:49:54,151 INFO L225 Difference]: With dead ends: 462 [2022-11-16 11:49:54,152 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 11:49:54,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 89 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=772, Invalid=3009, Unknown=1, NotChecked=0, Total=3782 [2022-11-16 11:49:54,153 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 555 mSDsluCounter, 1911 mSDsCounter, 0 mSdLazyCounter, 1706 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 2130 SdHoareTripleChecker+Invalid, 2476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 667 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:49:54,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 2130 Invalid, 2476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1706 Invalid, 0 Unknown, 667 Unchecked, 6.4s Time] [2022-11-16 11:49:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 11:49:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 443. [2022-11-16 11:49:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6688741721854305) internal successors, (504), 404 states have internal predecessors, (504), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 11:49:54,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 558 transitions. [2022-11-16 11:49:54,161 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 558 transitions. Word has length 54 [2022-11-16 11:49:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:49:54,161 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 558 transitions. [2022-11-16 11:49:54,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.0) internal successors, (68), 29 states have internal predecessors, (68), 9 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 10 states have call predecessors, (10), 9 states have call successors, (10) [2022-11-16 11:49:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 558 transitions. [2022-11-16 11:49:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-16 11:49:54,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:49:54,163 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:49:54,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2022-11-16 11:49:54,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (90)] Forceful destruction successful, exit code 0 [2022-11-16 11:49:54,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:49:54,570 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:49:54,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:49:54,570 INFO L85 PathProgramCache]: Analyzing trace with hash -2110101978, now seen corresponding path program 1 times [2022-11-16 11:49:54,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:49:54,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964835923] [2022-11-16 11:49:54,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:49:54,571 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:49:54,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:49:54,571 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:49:54,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Waiting until timeout for monitored process [2022-11-16 11:49:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:49:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:49:54,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:49:55,065 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:55,067 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:55,073 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:55,267 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:49:55,267 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:55,279 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:49:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:49:57,479 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:07,819 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:07,819 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 19 refuted. 12 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:50:08,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:09,065 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964835923] [2022-11-16 11:50:09,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964835923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:09,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1324022900] [2022-11-16 11:50:09,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:09,066 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:50:09,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:50:09,067 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:50:09,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (93)] Waiting until timeout for monitored process [2022-11-16 11:50:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:09,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-16 11:50:09,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:09,573 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:09,754 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:50:09,755 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:09,766 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:10,139 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:50:10,140 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:10,157 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:10,834 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:10,834 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:10,888 INFO L321 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2022-11-16 11:50:10,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2022-11-16 11:50:11,419 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:11,419 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:12,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 11:50:13,056 INFO L321 Elim1Store]: treesize reduction 20, result has 37.5 percent of original size [2022-11-16 11:50:13,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 25 [2022-11-16 11:50:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 6 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-16 11:50:13,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:14,484 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:50:14,484 INFO L350 Elim1Store]: Elim1 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 44 [2022-11-16 11:50:16,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1324022900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:16,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:50:16,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 22] total 25 [2022-11-16 11:50:16,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738216380] [2022-11-16 11:50:16,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:50:16,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:50:16,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:16,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:50:16,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=942, Unknown=29, NotChecked=0, Total=1260 [2022-11-16 11:50:16,563 INFO L87 Difference]: Start difference. First operand 443 states and 558 transitions. Second operand has 27 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 11:50:24,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:24,393 INFO L93 Difference]: Finished difference Result 443 states and 557 transitions. [2022-11-16 11:50:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-16 11:50:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 54 [2022-11-16 11:50:24,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:24,396 INFO L225 Difference]: With dead ends: 443 [2022-11-16 11:50:24,396 INFO L226 Difference]: Without dead ends: 443 [2022-11-16 11:50:24,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=380, Invalid=1311, Unknown=31, NotChecked=0, Total=1722 [2022-11-16 11:50:24,397 INFO L413 NwaCegarLoop]: 297 mSDtfsCounter, 16 mSDsluCounter, 2492 mSDsCounter, 0 mSdLazyCounter, 1108 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 2789 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 651 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:24,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 2789 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1108 Invalid, 0 Unknown, 651 Unchecked, 3.4s Time] [2022-11-16 11:50:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-11-16 11:50:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-11-16 11:50:24,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 302 states have (on average 1.6655629139072847) internal successors, (503), 404 states have internal predecessors, (503), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 11:50:24,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 557 transitions. [2022-11-16 11:50:24,406 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 557 transitions. Word has length 54 [2022-11-16 11:50:24,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:24,406 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 557 transitions. [2022-11-16 11:50:24,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 7 states have call successors, (9), 2 states have call predecessors, (9), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 11:50:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 557 transitions. [2022-11-16 11:50:24,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:50:24,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:24,408 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:24,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (93)] Ended with exit code 0 [2022-11-16 11:50:24,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (92)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:24,814 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:24,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash -894879203, now seen corresponding path program 1 times [2022-11-16 11:50:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:24,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [148540063] [2022-11-16 11:50:24,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:24,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:24,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:24,816 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:24,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Waiting until timeout for monitored process [2022-11-16 11:50:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:25,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:50:25,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:50:25,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:25,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [148540063] [2022-11-16 11:50:25,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [148540063] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:25,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:25,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:50:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704639289] [2022-11-16 11:50:25,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:25,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:50:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:50:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:25,095 INFO L87 Difference]: Start difference. First operand 443 states and 557 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:25,217 INFO L93 Difference]: Finished difference Result 447 states and 559 transitions. [2022-11-16 11:50:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:50:25,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-11-16 11:50:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:25,218 INFO L225 Difference]: With dead ends: 447 [2022-11-16 11:50:25,219 INFO L226 Difference]: Without dead ends: 447 [2022-11-16 11:50:25,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:25,219 INFO L413 NwaCegarLoop]: 332 mSDtfsCounter, 213 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:25,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 1097 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:50:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-11-16 11:50:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 442. [2022-11-16 11:50:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 302 states have (on average 1.6622516556291391) internal successors, (502), 403 states have internal predecessors, (502), 24 states have call successors, (24), 17 states have call predecessors, (24), 20 states have return successors, (30), 25 states have call predecessors, (30), 24 states have call successors, (30) [2022-11-16 11:50:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 556 transitions. [2022-11-16 11:50:25,225 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 556 transitions. Word has length 55 [2022-11-16 11:50:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:25,226 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 556 transitions. [2022-11-16 11:50:25,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 556 transitions. [2022-11-16 11:50:25,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:50:25,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:25,227 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:25,236 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (94)] Ended with exit code 0 [2022-11-16 11:50:25,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:25,431 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:25,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -894879327, now seen corresponding path program 1 times [2022-11-16 11:50:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:25,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860373707] [2022-11-16 11:50:25,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:25,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:25,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:25,433 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:25,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Waiting until timeout for monitored process [2022-11-16 11:50:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:25,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:50:25,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:50:25,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:25,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860373707] [2022-11-16 11:50:25,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860373707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:25,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:25,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:50:25,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606848060] [2022-11-16 11:50:25,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:25,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:50:25,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:25,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:50:25,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:25,741 INFO L87 Difference]: Start difference. First operand 442 states and 556 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:25,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:25,861 INFO L93 Difference]: Finished difference Result 462 states and 511 transitions. [2022-11-16 11:50:25,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:50:25,862 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-11-16 11:50:25,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:25,863 INFO L225 Difference]: With dead ends: 462 [2022-11-16 11:50:25,863 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 11:50:25,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:25,863 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 93 mSDsluCounter, 971 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 1309 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:25,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 1309 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:50:25,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 11:50:25,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 370. [2022-11-16 11:50:25,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 239 states have (on average 1.5857740585774058) internal successors, (379), 340 states have internal predecessors, (379), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:50:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 414 transitions. [2022-11-16 11:50:25,867 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 414 transitions. Word has length 55 [2022-11-16 11:50:25,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:25,868 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 414 transitions. [2022-11-16 11:50:25,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:25,868 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 414 transitions. [2022-11-16 11:50:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:50:25,868 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:25,869 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:25,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (95)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:26,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:26,075 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:26,075 INFO L85 PathProgramCache]: Analyzing trace with hash -923508478, now seen corresponding path program 1 times [2022-11-16 11:50:26,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:26,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667961042] [2022-11-16 11:50:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:26,076 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:26,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:26,084 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:26,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Waiting until timeout for monitored process [2022-11-16 11:50:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:50:26,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:26,336 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:50:26,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:26,385 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:26,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667961042] [2022-11-16 11:50:26,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667961042] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:26,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:26,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:50:26,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005187626] [2022-11-16 11:50:26,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:26,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:50:26,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:26,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:50:26,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:26,386 INFO L87 Difference]: Start difference. First operand 370 states and 414 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:27,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:27,389 INFO L93 Difference]: Finished difference Result 388 states and 438 transitions. [2022-11-16 11:50:27,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:50:27,390 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-11-16 11:50:27,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:27,392 INFO L225 Difference]: With dead ends: 388 [2022-11-16 11:50:27,392 INFO L226 Difference]: Without dead ends: 388 [2022-11-16 11:50:27,392 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:50:27,392 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 51 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 883 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:27,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 883 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-16 11:50:27,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-16 11:50:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 368. [2022-11-16 11:50:27,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 239 states have (on average 1.5774058577405858) internal successors, (377), 338 states have internal predecessors, (377), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:50:27,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 412 transitions. [2022-11-16 11:50:27,396 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 412 transitions. Word has length 55 [2022-11-16 11:50:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:27,397 INFO L495 AbstractCegarLoop]: Abstraction has 368 states and 412 transitions. [2022-11-16 11:50:27,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 412 transitions. [2022-11-16 11:50:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:50:27,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:27,397 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:27,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (96)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:27,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:27,598 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:27,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:27,598 INFO L85 PathProgramCache]: Analyzing trace with hash -923508477, now seen corresponding path program 1 times [2022-11-16 11:50:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:27,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [837851237] [2022-11-16 11:50:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:27,599 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:27,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:27,600 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:27,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Waiting until timeout for monitored process [2022-11-16 11:50:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 11:50:27,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:27,939 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2022-11-16 11:50:27,967 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:50:27,967 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:50:27,987 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:27,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:27,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [837851237] [2022-11-16 11:50:27,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [837851237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:27,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:27,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:50:27,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280191111] [2022-11-16 11:50:27,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:27,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:50:27,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:27,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:50:27,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-16 11:50:27,988 INFO L87 Difference]: Start difference. First operand 368 states and 412 transitions. Second operand has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:50:29,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:29,299 INFO L93 Difference]: Finished difference Result 428 states and 490 transitions. [2022-11-16 11:50:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:50:29,300 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-11-16 11:50:29,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:29,301 INFO L225 Difference]: With dead ends: 428 [2022-11-16 11:50:29,302 INFO L226 Difference]: Without dead ends: 428 [2022-11-16 11:50:29,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2022-11-16 11:50:29,302 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 136 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:29,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 560 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 314 Invalid, 0 Unknown, 417 Unchecked, 1.3s Time] [2022-11-16 11:50:29,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2022-11-16 11:50:29,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 367. [2022-11-16 11:50:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 239 states have (on average 1.5732217573221758) internal successors, (376), 337 states have internal predecessors, (376), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:50:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 411 transitions. [2022-11-16 11:50:29,309 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 411 transitions. Word has length 55 [2022-11-16 11:50:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:29,309 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 411 transitions. [2022-11-16 11:50:29,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.75) internal successors, (31), 5 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:50:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 411 transitions. [2022-11-16 11:50:29,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:50:29,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:29,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:29,326 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (97)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:29,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:29,515 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:29,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:29,515 INFO L85 PathProgramCache]: Analyzing trace with hash -923508476, now seen corresponding path program 1 times [2022-11-16 11:50:29,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:29,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102796651] [2022-11-16 11:50:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:29,516 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:29,523 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:29,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Waiting until timeout for monitored process [2022-11-16 11:50:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:50:29,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:29,797 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 11:50:29,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:29,906 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:29,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102796651] [2022-11-16 11:50:29,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102796651] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:29,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:29,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:50:29,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125906256] [2022-11-16 11:50:29,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:29,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:50:29,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:50:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:50:29,908 INFO L87 Difference]: Start difference. First operand 367 states and 411 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:31,542 INFO L93 Difference]: Finished difference Result 460 states and 510 transitions. [2022-11-16 11:50:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:50:31,544 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 55 [2022-11-16 11:50:31,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:31,545 INFO L225 Difference]: With dead ends: 460 [2022-11-16 11:50:31,545 INFO L226 Difference]: Without dead ends: 460 [2022-11-16 11:50:31,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:50:31,545 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 100 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1471 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:31,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1471 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-16 11:50:31,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-16 11:50:31,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 365. [2022-11-16 11:50:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 239 states have (on average 1.5648535564853556) internal successors, (374), 335 states have internal predecessors, (374), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:50:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 409 transitions. [2022-11-16 11:50:31,550 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 409 transitions. Word has length 55 [2022-11-16 11:50:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:31,550 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 409 transitions. [2022-11-16 11:50:31,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 409 transitions. [2022-11-16 11:50:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-16 11:50:31,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:31,550 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:31,559 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (98)] Ended with exit code 0 [2022-11-16 11:50:31,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:31,751 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:31,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:31,751 INFO L85 PathProgramCache]: Analyzing trace with hash -923508475, now seen corresponding path program 1 times [2022-11-16 11:50:31,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:31,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [895571219] [2022-11-16 11:50:31,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:31,752 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:31,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:31,753 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:31,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Waiting until timeout for monitored process [2022-11-16 11:50:32,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:32,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 11:50:32,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:32,205 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (exists ((v_ArrVal_2268 (_ BitVec 32))) (= |c_#length| (store |c_old(#length)| |ldv_malloc_#res.base| v_ArrVal_2268))))) is different from true [2022-11-16 11:50:32,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:32,232 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:32,251 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-16 11:50:32,252 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:32,326 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:50:32,327 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:32,327 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:32,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [895571219] [2022-11-16 11:50:32,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [895571219] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:32,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:32,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:50:32,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135170814] [2022-11-16 11:50:32,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:32,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:50:32,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:32,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:50:32,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-16 11:50:32,328 INFO L87 Difference]: Start difference. First operand 365 states and 409 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:50:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:36,103 INFO L93 Difference]: Finished difference Result 462 states and 512 transitions. [2022-11-16 11:50:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:50:36,105 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 55 [2022-11-16 11:50:36,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:36,106 INFO L225 Difference]: With dead ends: 462 [2022-11-16 11:50:36,106 INFO L226 Difference]: Without dead ends: 462 [2022-11-16 11:50:36,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2022-11-16 11:50:36,107 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 145 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:36,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 720 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 527 Invalid, 0 Unknown, 445 Unchecked, 3.8s Time] [2022-11-16 11:50:36,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-11-16 11:50:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 364. [2022-11-16 11:50:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5672268907563025) internal successors, (373), 334 states have internal predecessors, (373), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:50:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 408 transitions. [2022-11-16 11:50:36,113 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 408 transitions. Word has length 55 [2022-11-16 11:50:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:36,114 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 408 transitions. [2022-11-16 11:50:36,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:50:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 408 transitions. [2022-11-16 11:50:36,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:50:36,115 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:36,115 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:36,134 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (99)] Ended with exit code 0 [2022-11-16 11:50:36,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:36,329 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr61ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:36,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:36,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1971451162, now seen corresponding path program 1 times [2022-11-16 11:50:36,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:36,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1592982700] [2022-11-16 11:50:36,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:36,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:36,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:36,330 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:36,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Waiting until timeout for monitored process [2022-11-16 11:50:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 11:50:36,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:36,837 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:50:36,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:50:36,838 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:36,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1592982700] [2022-11-16 11:50:36,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1592982700] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:50:36,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:50:36,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:50:36,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491873909] [2022-11-16 11:50:36,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:50:36,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:50:36,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:50:36,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:50:36,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:50:36,839 INFO L87 Difference]: Start difference. First operand 364 states and 408 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:50:37,294 INFO L93 Difference]: Finished difference Result 455 states and 504 transitions. [2022-11-16 11:50:37,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 11:50:37,294 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 56 [2022-11-16 11:50:37,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:50:37,296 INFO L225 Difference]: With dead ends: 455 [2022-11-16 11:50:37,296 INFO L226 Difference]: Without dead ends: 455 [2022-11-16 11:50:37,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:50:37,296 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 440 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1118 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:50:37,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1118 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:50:37,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-16 11:50:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 364. [2022-11-16 11:50:37,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 334 states have internal predecessors, (372), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:50:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 407 transitions. [2022-11-16 11:50:37,301 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 407 transitions. Word has length 56 [2022-11-16 11:50:37,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:50:37,301 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 407 transitions. [2022-11-16 11:50:37,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:50:37,301 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 407 transitions. [2022-11-16 11:50:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-16 11:50:37,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:50:37,302 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:50:37,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (100)] Forceful destruction successful, exit code 0 [2022-11-16 11:50:37,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:37,502 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:50:37,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:50:37,503 INFO L85 PathProgramCache]: Analyzing trace with hash -583426009, now seen corresponding path program 1 times [2022-11-16 11:50:37,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:50:37,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81647182] [2022-11-16 11:50:37,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:37,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:50:37,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:50:37,504 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:50:37,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Waiting until timeout for monitored process [2022-11-16 11:50:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-16 11:50:37,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:38,072 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:50:38,072 INFO L350 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 11:50:38,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:50:38,444 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 23 [2022-11-16 11:50:38,737 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:38,737 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:38,743 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:38,789 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:38,790 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:38,796 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:39,193 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:39,193 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 24 [2022-11-16 11:50:39,205 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 11:50:39,247 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:39,247 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 24 [2022-11-16 11:50:39,515 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:39,515 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 24 [2022-11-16 11:50:39,569 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:39,569 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 24 [2022-11-16 11:50:40,205 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:42,727 INFO L321 Elim1Store]: treesize reduction 30, result has 58.9 percent of original size [2022-11-16 11:50:42,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 77 [2022-11-16 11:50:45,352 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:45,360 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 2 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:50:45,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:45,859 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:50:45,859 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:46,555 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-11-16 11:50:46,555 INFO L350 Elim1Store]: Elim1 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 28 [2022-11-16 11:50:52,165 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:50:52,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81647182] [2022-11-16 11:50:52,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81647182] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:50:52,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1828947523] [2022-11-16 11:50:52,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:50:52,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:50:52,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:50:52,167 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:50:52,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (102)] Waiting until timeout for monitored process [2022-11-16 11:50:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:50:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-16 11:50:52,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:50:57,162 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:50:57,162 INFO L350 Elim1Store]: Elim1 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 24 [2022-11-16 11:50:57,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:50:57,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-16 11:50:58,081 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:58,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-16 11:50:58,095 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:58,139 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:58,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 27 [2022-11-16 11:50:58,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:50:58,146 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-16 11:50:58,520 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:58,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:50:58,558 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:58,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-16 11:50:58,609 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 11:50:58,961 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:58,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2022-11-16 11:50:59,010 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-16 11:50:59,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-11-16 11:50:59,024 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-16 11:50:59,519 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:59,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-16 11:50:59,816 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 24 refuted. 2 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:50:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:50:59,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-16 11:50:59,885 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:50:59,967 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:51:03,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1828947523] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:03,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:03,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2022-11-16 11:51:03,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172630133] [2022-11-16 11:51:03,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-16 11:51:03,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:51:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-16 11:51:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1004, Unknown=17, NotChecked=0, Total=1260 [2022-11-16 11:51:03,593 INFO L87 Difference]: Start difference. First operand 364 states and 407 transitions. Second operand has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 11:51:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:26,637 INFO L93 Difference]: Finished difference Result 376 states and 409 transitions. [2022-11-16 11:51:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-16 11:51:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 56 [2022-11-16 11:51:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:26,639 INFO L225 Difference]: With dead ends: 376 [2022-11-16 11:51:26,639 INFO L226 Difference]: Without dead ends: 376 [2022-11-16 11:51:26,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 152 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=390, Invalid=1838, Unknown=28, NotChecked=0, Total=2256 [2022-11-16 11:51:26,640 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 297 mSDsluCounter, 4134 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 4442 SdHoareTripleChecker+Invalid, 2659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 793 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:26,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 4442 Invalid, 2659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1845 Invalid, 0 Unknown, 793 Unchecked, 6.4s Time] [2022-11-16 11:51:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-16 11:51:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 364. [2022-11-16 11:51:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 238 states have (on average 1.5588235294117647) internal successors, (371), 334 states have internal predecessors, (371), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:51:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 406 transitions. [2022-11-16 11:51:26,645 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 406 transitions. Word has length 56 [2022-11-16 11:51:26,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:26,646 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 406 transitions. [2022-11-16 11:51:26,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.8461538461538463) internal successors, (74), 22 states have internal predecessors, (74), 7 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2022-11-16 11:51:26,646 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 406 transitions. [2022-11-16 11:51:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 11:51:26,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:26,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:26,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (101)] Ended with exit code 0 [2022-11-16 11:51:26,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (102)] Ended with exit code 0 [2022-11-16 11:51:27,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:51:27,060 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr63REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:51:27,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:27,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1246109365, now seen corresponding path program 1 times [2022-11-16 11:51:27,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:51:27,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [358524452] [2022-11-16 11:51:27,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:27,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:27,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:51:27,061 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:51:27,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Waiting until timeout for monitored process [2022-11-16 11:51:27,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:51:27,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:27,353 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:51:27,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:51:27,353 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:51:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [358524452] [2022-11-16 11:51:27,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [358524452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:51:27,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:51:27,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:51:27,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537153129] [2022-11-16 11:51:27,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:51:27,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:51:27,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:51:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:51:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:51:27,355 INFO L87 Difference]: Start difference. First operand 364 states and 406 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:51:27,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:27,429 INFO L93 Difference]: Finished difference Result 427 states and 472 transitions. [2022-11-16 11:51:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:51:27,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 60 [2022-11-16 11:51:27,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:27,430 INFO L225 Difference]: With dead ends: 427 [2022-11-16 11:51:27,430 INFO L226 Difference]: Without dead ends: 427 [2022-11-16 11:51:27,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:51:27,431 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 121 mSDsluCounter, 948 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:27,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1281 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:51:27,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-16 11:51:27,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 366. [2022-11-16 11:51:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 240 states have (on average 1.5541666666666667) internal successors, (373), 336 states have internal predecessors, (373), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:51:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 408 transitions. [2022-11-16 11:51:27,434 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 408 transitions. Word has length 60 [2022-11-16 11:51:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:27,435 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 408 transitions. [2022-11-16 11:51:27,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:51:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 408 transitions. [2022-11-16 11:51:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-16 11:51:27,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:27,435 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:27,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (103)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:27,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:27,639 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:51:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:27,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1246108245, now seen corresponding path program 1 times [2022-11-16 11:51:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:51:27,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1004760077] [2022-11-16 11:51:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:27,640 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:27,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:51:27,641 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:51:27,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Waiting until timeout for monitored process [2022-11-16 11:51:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:27,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:51:27,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:51:28,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:51:28,112 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:51:28,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1004760077] [2022-11-16 11:51:28,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1004760077] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:28,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:28,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2022-11-16 11:51:28,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394942919] [2022-11-16 11:51:28,113 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:28,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:51:28,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:51:28,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:51:28,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:51:28,114 INFO L87 Difference]: Start difference. First operand 366 states and 408 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:51:28,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:28,195 INFO L93 Difference]: Finished difference Result 365 states and 407 transitions. [2022-11-16 11:51:28,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:51:28,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 60 [2022-11-16 11:51:28,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:28,197 INFO L225 Difference]: With dead ends: 365 [2022-11-16 11:51:28,197 INFO L226 Difference]: Without dead ends: 365 [2022-11-16 11:51:28,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:51:28,197 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 202 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:28,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 992 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:51:28,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-11-16 11:51:28,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-11-16 11:51:28,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 240 states have (on average 1.55) internal successors, (372), 335 states have internal predecessors, (372), 16 states have call successors, (16), 13 states have call predecessors, (16), 16 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-11-16 11:51:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 407 transitions. [2022-11-16 11:51:28,201 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 407 transitions. Word has length 60 [2022-11-16 11:51:28,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:28,201 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 407 transitions. [2022-11-16 11:51:28,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-16 11:51:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 407 transitions. [2022-11-16 11:51:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:51:28,202 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:28,202 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:28,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (104)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:28,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:28,403 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr75ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:51:28,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:28,403 INFO L85 PathProgramCache]: Analyzing trace with hash 25350471, now seen corresponding path program 1 times [2022-11-16 11:51:28,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:51:28,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263227428] [2022-11-16 11:51:28,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:28,403 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:51:28,404 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:51:28,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Waiting until timeout for monitored process [2022-11-16 11:51:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:28,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:51:28,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:51:29,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:51:29,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:51:29,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263227428] [2022-11-16 11:51:29,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263227428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:51:29,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:51:29,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:51:29,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939725240] [2022-11-16 11:51:29,621 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:51:29,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:51:29,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:51:29,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:51:29,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:51:29,622 INFO L87 Difference]: Start difference. First operand 365 states and 407 transitions. Second operand has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:51:29,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:51:29,966 INFO L93 Difference]: Finished difference Result 524 states and 589 transitions. [2022-11-16 11:51:29,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:51:29,967 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 61 [2022-11-16 11:51:29,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:51:29,968 INFO L225 Difference]: With dead ends: 524 [2022-11-16 11:51:29,968 INFO L226 Difference]: Without dead ends: 524 [2022-11-16 11:51:29,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:51:29,969 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 270 mSDsluCounter, 1666 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:51:29,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 2074 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 133 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-11-16 11:51:29,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-11-16 11:51:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 431. [2022-11-16 11:51:29,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 295 states have (on average 1.583050847457627) internal successors, (467), 392 states have internal predecessors, (467), 23 states have call successors, (23), 18 states have call predecessors, (23), 22 states have return successors, (29), 24 states have call predecessors, (29), 23 states have call successors, (29) [2022-11-16 11:51:29,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 519 transitions. [2022-11-16 11:51:29,977 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 519 transitions. Word has length 61 [2022-11-16 11:51:29,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:51:29,978 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 519 transitions. [2022-11-16 11:51:29,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.444444444444445) internal successors, (76), 8 states have internal predecessors, (76), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:51:29,978 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 519 transitions. [2022-11-16 11:51:29,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-16 11:51:29,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:51:29,979 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:51:29,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (105)] Forceful destruction successful, exit code 0 [2022-11-16 11:51:30,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:30,195 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:51:30,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:51:30,195 INFO L85 PathProgramCache]: Analyzing trace with hash -597667913, now seen corresponding path program 1 times [2022-11-16 11:51:30,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:51:30,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [386634176] [2022-11-16 11:51:30,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:30,196 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:51:30,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:51:30,197 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:51:30,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Waiting until timeout for monitored process [2022-11-16 11:51:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:30,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-16 11:51:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:51:51,208 WARN L855 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_2551 (_ BitVec 1)) (v_ArrVal_2550 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~fe~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~addr~0#1.base| (_ BitVec 32)) (v_ArrVal_2558 (_ BitVec 1))) (let ((.cse1 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2550))) (let ((.cse2 (store .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base| v_ArrVal_2551))) (let ((.cse3 (store .cse2 |ULTIMATE.start_entry_point_~fe~2#1.base| v_ArrVal_2558))) (let ((.cse0 (store (store .cse3 |ULTIMATE.start_entry_point_~addr~0#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 1)))) (and (= (bvadd (select .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv1 1)) (_ bv0 1)) (= (select .cse1 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv0 1)) (= (select .cse2 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv0 1)) (= (store (store .cse0 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse3 |ULTIMATE.start_entry_point_~addr~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 32))) (= (bvadd (_ bv1 1) (select .cse2 |ULTIMATE.start_entry_point_~client~0#1.base|)) (_ bv0 1)))))))))) is different from true [2022-11-16 11:51:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 11:51:51,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:51:52,339 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 19 [2022-11-16 11:51:58,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:51:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [386634176] [2022-11-16 11:51:58,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [386634176] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:51:58,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1416506440] [2022-11-16 11:51:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:51:58,163 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:51:58,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:51:58,164 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:51:58,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (107)] Waiting until timeout for monitored process [2022-11-16 11:51:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:51:58,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-16 11:51:58,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:52:46,052 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32)) (v_ArrVal_2601 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~fe~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~addr~0#1.base| (_ BitVec 32)) (v_ArrVal_2603 (_ BitVec 1)) (v_ArrVal_2602 (_ BitVec 1))) (let ((.cse4 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2602))) (let ((.cse0 (store .cse4 |ULTIMATE.start_entry_point_~cfg~2#1.base| v_ArrVal_2601))) (let ((.cse2 (store .cse0 |ULTIMATE.start_entry_point_~fe~2#1.base| v_ArrVal_2603))) (let ((.cse1 (store .cse2 |ULTIMATE.start_entry_point_~addr~0#1.base| (_ bv0 1)))) (let ((.cse3 (store .cse1 |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 1)))) (let ((.cse5 (store .cse3 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (select .cse0 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv0 1)) (= (_ bv0 1) (bvadd (select .cse1 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv1 1))) (not (= |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 32))) (= (select .cse2 |ULTIMATE.start_entry_point_~addr~0#1.base|) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 32))) (= (bvadd (select .cse3 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv1 1)) (_ bv0 1)) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (= (select .cse4 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv0 1)) (= (store .cse5 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))) (= (bvadd (select .cse5 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1)) (_ bv0 1)))))))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32)))) is different from true [2022-11-16 11:52:46,871 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:52:46,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:52:53,380 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 19 [2022-11-16 11:52:53,392 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 19 [2022-11-16 11:52:53,415 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 19 [2022-11-16 11:53:08,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1416506440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:08,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:53:08,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 38 [2022-11-16 11:53:08,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128418985] [2022-11-16 11:53:08,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:08,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-16 11:53:08,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:53:08,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-16 11:53:08,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=2592, Unknown=39, NotChecked=210, Total=3080 [2022-11-16 11:53:08,686 INFO L87 Difference]: Start difference. First operand 431 states and 519 transitions. Second operand has 39 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:53:45,459 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32)) (v_ArrVal_2601 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~fe~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~addr~0#1.base| (_ BitVec 32)) (v_ArrVal_2603 (_ BitVec 1)) (v_ArrVal_2602 (_ BitVec 1))) (let ((.cse4 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2602))) (let ((.cse0 (store .cse4 |ULTIMATE.start_entry_point_~cfg~2#1.base| v_ArrVal_2601))) (let ((.cse2 (store .cse0 |ULTIMATE.start_entry_point_~fe~2#1.base| v_ArrVal_2603))) (let ((.cse1 (store .cse2 |ULTIMATE.start_entry_point_~addr~0#1.base| (_ bv0 1)))) (let ((.cse3 (store .cse1 |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 1)))) (let ((.cse5 (store .cse3 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)))) (and (= (select .cse0 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv0 1)) (= (_ bv0 1) (bvadd (select .cse1 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv1 1))) (not (= |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 32))) (= (select .cse2 |ULTIMATE.start_entry_point_~addr~0#1.base|) (_ bv0 1)) (not (= |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 32))) (= (bvadd (select .cse3 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv1 1)) (_ bv0 1)) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (= (select .cse4 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv0 1)) (= (store .cse5 |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))) (= (bvadd (select .cse5 |ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1)) (_ bv0 1)))))))))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (v_ArrVal_2551 (_ BitVec 1)) (v_ArrVal_2550 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~fe~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~addr~0#1.base| (_ BitVec 32)) (v_ArrVal_2558 (_ BitVec 1))) (let ((.cse7 (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| v_ArrVal_2550))) (let ((.cse8 (store .cse7 |ULTIMATE.start_entry_point_~cfg~2#1.base| v_ArrVal_2551))) (let ((.cse9 (store .cse8 |ULTIMATE.start_entry_point_~fe~2#1.base| v_ArrVal_2558))) (let ((.cse6 (store (store .cse9 |ULTIMATE.start_entry_point_~addr~0#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~fe~2#1.base| (_ bv0 1)))) (and (= (bvadd (select .cse6 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv1 1)) (_ bv0 1)) (= (select .cse7 |ULTIMATE.start_entry_point_~cfg~2#1.base|) (_ bv0 1)) (= (select .cse8 |ULTIMATE.start_entry_point_~fe~2#1.base|) (_ bv0 1)) (= (store (store .cse6 |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select .cse9 |ULTIMATE.start_entry_point_~addr~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 32))) (= (bvadd (_ bv1 1) (select .cse8 |ULTIMATE.start_entry_point_~client~0#1.base|)) (_ bv0 1))))))))))) is different from true [2022-11-16 11:53:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:46,704 INFO L93 Difference]: Finished difference Result 438 states and 526 transitions. [2022-11-16 11:53:46,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-16 11:53:46,705 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 61 [2022-11-16 11:53:46,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:46,705 INFO L225 Difference]: With dead ends: 438 [2022-11-16 11:53:46,705 INFO L226 Difference]: Without dead ends: 413 [2022-11-16 11:53:46,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 126 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 127.7s TimeCoverageRelationStatistics Valid=366, Invalid=4151, Unknown=51, NotChecked=402, Total=4970 [2022-11-16 11:53:46,706 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 48 mSDsluCounter, 3576 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3830 SdHoareTripleChecker+Invalid, 3583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3198 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:46,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 3830 Invalid, 3583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 373 Invalid, 0 Unknown, 3198 Unchecked, 1.3s Time] [2022-11-16 11:53:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-11-16 11:53:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 409. [2022-11-16 11:53:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 274 states have (on average 1.6240875912408759) internal successors, (445), 371 states have internal predecessors, (445), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-16 11:53:46,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 496 transitions. [2022-11-16 11:53:46,710 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 496 transitions. Word has length 61 [2022-11-16 11:53:46,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:46,710 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 496 transitions. [2022-11-16 11:53:46,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 34 states have (on average 2.323529411764706) internal successors, (79), 31 states have internal predecessors, (79), 10 states have call successors, (10), 1 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-16 11:53:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 496 transitions. [2022-11-16 11:53:46,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:53:46,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:46,711 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:46,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (107)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:46,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (106)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:47,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:47,111 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:53:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash 785865005, now seen corresponding path program 1 times [2022-11-16 11:53:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:53:47,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1237952232] [2022-11-16 11:53:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:47,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:53:47,113 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:53:47,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Waiting until timeout for monitored process [2022-11-16 11:53:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:47,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-16 11:53:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:47,428 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:53:47,544 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:53:47,545 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:53:47,849 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:53:47,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 31 [2022-11-16 11:53:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:53:47,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 11:53:49,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:53:49,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1237952232] [2022-11-16 11:53:49,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1237952232] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:53:49,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:53:49,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-11-16 11:53:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983345268] [2022-11-16 11:53:49,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:49,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-16 11:53:49,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:53:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-16 11:53:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:53:49,024 INFO L87 Difference]: Start difference. First operand 409 states and 496 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:53:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:50,885 INFO L93 Difference]: Finished difference Result 421 states and 509 transitions. [2022-11-16 11:53:50,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:53:50,886 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-16 11:53:50,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:50,887 INFO L225 Difference]: With dead ends: 421 [2022-11-16 11:53:50,887 INFO L226 Difference]: Without dead ends: 421 [2022-11-16 11:53:50,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-11-16 11:53:50,888 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 70 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 1769 SdHoareTripleChecker+Invalid, 1425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 743 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:50,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 1769 Invalid, 1425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 665 Invalid, 0 Unknown, 743 Unchecked, 1.8s Time] [2022-11-16 11:53:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-16 11:53:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 417. [2022-11-16 11:53:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 282 states have (on average 1.6063829787234043) internal successors, (453), 379 states have internal predecessors, (453), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-16 11:53:50,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 504 transitions. [2022-11-16 11:53:50,899 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 504 transitions. Word has length 62 [2022-11-16 11:53:50,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:50,900 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 504 transitions. [2022-11-16 11:53:50,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (8), 5 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:53:50,900 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 504 transitions. [2022-11-16 11:53:50,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-16 11:53:50,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:50,901 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:50,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (108)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:51,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:51,113 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr76ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:53:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:51,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1079268012, now seen corresponding path program 1 times [2022-11-16 11:53:51,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:53:51,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [912676777] [2022-11-16 11:53:51,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:51,114 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:51,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:53:51,115 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:53:51,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Waiting until timeout for monitored process [2022-11-16 11:53:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:51,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:53:51,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:51,471 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:53:51,471 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:53:51,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:53:51,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [912676777] [2022-11-16 11:53:51,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [912676777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:51,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:51,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 11:53:51,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525742357] [2022-11-16 11:53:51,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:51,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 11:53:51,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:53:51,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 11:53:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:53:51,473 INFO L87 Difference]: Start difference. First operand 417 states and 504 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:53:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:51,610 INFO L93 Difference]: Finished difference Result 467 states and 557 transitions. [2022-11-16 11:53:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 11:53:51,611 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2022-11-16 11:53:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:51,611 INFO L225 Difference]: With dead ends: 467 [2022-11-16 11:53:51,612 INFO L226 Difference]: Without dead ends: 467 [2022-11-16 11:53:51,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:53:51,612 INFO L413 NwaCegarLoop]: 368 mSDtfsCounter, 206 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:51,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1243 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 11:53:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-11-16 11:53:51,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 410. [2022-11-16 11:53:51,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 275 states have (on average 1.6181818181818182) internal successors, (445), 372 states have internal predecessors, (445), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-16 11:53:51,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 496 transitions. [2022-11-16 11:53:51,618 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 496 transitions. Word has length 62 [2022-11-16 11:53:51,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:51,618 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 496 transitions. [2022-11-16 11:53:51,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-16 11:53:51,619 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 496 transitions. [2022-11-16 11:53:51,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-16 11:53:51,619 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:51,619 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:51,636 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (109)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:51,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:51,820 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:53:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:51,820 INFO L85 PathProgramCache]: Analyzing trace with hash -697961265, now seen corresponding path program 1 times [2022-11-16 11:53:51,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:53:51,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1479653998] [2022-11-16 11:53:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:51,820 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:51,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:53:51,821 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:53:51,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Waiting until timeout for monitored process [2022-11-16 11:53:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:52,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:53:52,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:53:52,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:53:53,174 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:53:53,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1479653998] [2022-11-16 11:53:53,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1479653998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:53:53,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:53:53,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:53:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249276068] [2022-11-16 11:53:53,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:53,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:53:53,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:53:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:53:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:53:53,176 INFO L87 Difference]: Start difference. First operand 410 states and 496 transitions. Second operand has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:53:53,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:53,565 INFO L93 Difference]: Finished difference Result 505 states and 568 transitions. [2022-11-16 11:53:53,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:53:53,566 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 64 [2022-11-16 11:53:53,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:53,567 INFO L225 Difference]: With dead ends: 505 [2022-11-16 11:53:53,567 INFO L226 Difference]: Without dead ends: 505 [2022-11-16 11:53:53,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:53:53,567 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 270 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 2108 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:53,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 2108 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 143 Invalid, 0 Unknown, 147 Unchecked, 0.4s Time] [2022-11-16 11:53:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-11-16 11:53:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 412. [2022-11-16 11:53:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 277 states have (on average 1.6137184115523466) internal successors, (447), 374 states have internal predecessors, (447), 23 states have call successors, (23), 18 states have call predecessors, (23), 21 states have return successors, (28), 23 states have call predecessors, (28), 23 states have call successors, (28) [2022-11-16 11:53:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 498 transitions. [2022-11-16 11:53:53,574 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 498 transitions. Word has length 64 [2022-11-16 11:53:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:53,574 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 498 transitions. [2022-11-16 11:53:53,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.11111111111111) internal successors, (82), 8 states have internal predecessors, (82), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:53:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 498 transitions. [2022-11-16 11:53:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:53:53,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:53,575 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:53,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (110)] Ended with exit code 0 [2022-11-16 11:53:53,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:53,788 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:53:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash -902698691, now seen corresponding path program 1 times [2022-11-16 11:53:53,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:53:53,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [600741457] [2022-11-16 11:53:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:53,789 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:53,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:53:53,792 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:53:53,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Waiting until timeout for monitored process [2022-11-16 11:53:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:53:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:53:54,115 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:53:54,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:53:54,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [600741457] [2022-11-16 11:53:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [600741457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:53:54,116 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:53:54,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:53:54,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445011294] [2022-11-16 11:53:54,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:53:54,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:53:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:53:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:53:54,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:53:54,117 INFO L87 Difference]: Start difference. First operand 412 states and 498 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:53:54,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:53:54,808 INFO L93 Difference]: Finished difference Result 424 states and 512 transitions. [2022-11-16 11:53:54,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:53:54,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 65 [2022-11-16 11:53:54,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:53:54,811 INFO L225 Difference]: With dead ends: 424 [2022-11-16 11:53:54,811 INFO L226 Difference]: Without dead ends: 421 [2022-11-16 11:53:54,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:53:54,812 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 3 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 11:53:54,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 919 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 11:53:54,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-11-16 11:53:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-11-16 11:53:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 284 states have (on average 1.6056338028169015) internal successors, (456), 383 states have internal predecessors, (456), 23 states have call successors, (23), 18 states have call predecessors, (23), 23 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2022-11-16 11:53:54,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 509 transitions. [2022-11-16 11:53:54,821 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 509 transitions. Word has length 65 [2022-11-16 11:53:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:53:54,822 INFO L495 AbstractCegarLoop]: Abstraction has 421 states and 509 transitions. [2022-11-16 11:53:54,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:53:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 509 transitions. [2022-11-16 11:53:54,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-16 11:53:54,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:53:54,823 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:53:54,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (111)] Forceful destruction successful, exit code 0 [2022-11-16 11:53:55,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:55,039 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:53:55,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:53:55,039 INFO L85 PathProgramCache]: Analyzing trace with hash -161962324, now seen corresponding path program 1 times [2022-11-16 11:53:55,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:53:55,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [378241123] [2022-11-16 11:53:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:55,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:53:55,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:53:55,041 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:53:55,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Waiting until timeout for monitored process [2022-11-16 11:53:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:55,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-16 11:53:55,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:55,404 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:53:55,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:53:55,736 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:53:55,737 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:53:56,004 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:53:56,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 11:53:56,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:53:56,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:53:56,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2022-11-16 11:53:56,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:53:57,050 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:53:57,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:57,701 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:53:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [378241123] [2022-11-16 11:53:57,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [378241123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:57,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1210170528] [2022-11-16 11:53:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:53:57,702 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:53:57,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:53:57,703 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:53:57,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (113)] Waiting until timeout for monitored process [2022-11-16 11:53:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:53:58,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 11:53:58,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:53:58,503 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:53:58,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:53:58,754 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:53:58,754 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:53:58,968 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:53:58,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 11:53:59,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:53:59,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:53:59,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2022-11-16 11:53:59,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:53:59,565 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:53:59,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:53:59,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1210170528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:53:59,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:53:59,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2022-11-16 11:53:59,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858531233] [2022-11-16 11:53:59,879 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:53:59,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-16 11:53:59,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:53:59,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-16 11:53:59,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-11-16 11:53:59,880 INFO L87 Difference]: Start difference. First operand 421 states and 509 transitions. Second operand has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 11:54:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:03,367 INFO L93 Difference]: Finished difference Result 426 states and 515 transitions. [2022-11-16 11:54:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-16 11:54:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) Word has length 65 [2022-11-16 11:54:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:03,369 INFO L225 Difference]: With dead ends: 426 [2022-11-16 11:54:03,369 INFO L226 Difference]: Without dead ends: 426 [2022-11-16 11:54:03,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-11-16 11:54:03,370 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 52 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 1480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 669 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:03,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1658 Invalid, 1480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 795 Invalid, 0 Unknown, 669 Unchecked, 3.2s Time] [2022-11-16 11:54:03,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-16 11:54:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 422. [2022-11-16 11:54:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 285 states have (on average 1.6035087719298247) internal successors, (457), 384 states have internal predecessors, (457), 23 states have call successors, (23), 18 states have call predecessors, (23), 23 states have return successors, (30), 23 states have call predecessors, (30), 23 states have call successors, (30) [2022-11-16 11:54:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 510 transitions. [2022-11-16 11:54:03,375 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 510 transitions. Word has length 65 [2022-11-16 11:54:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:03,376 INFO L495 AbstractCegarLoop]: Abstraction has 422 states and 510 transitions. [2022-11-16 11:54:03,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 13 states have internal predecessors, (50), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-16 11:54:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 510 transitions. [2022-11-16 11:54:03,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-16 11:54:03,376 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:03,376 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:03,391 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (112)] Ended with exit code 0 [2022-11-16 11:54:03,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (113)] Ended with exit code 0 [2022-11-16 11:54:03,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:54:03,777 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:03,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1163228186, now seen corresponding path program 1 times [2022-11-16 11:54:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:03,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [40200053] [2022-11-16 11:54:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:03,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:03,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:03,779 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:03,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Waiting until timeout for monitored process [2022-11-16 11:54:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:04,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:54:04,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:04,302 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-16 11:54:04,302 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:04,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [40200053] [2022-11-16 11:54:04,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [40200053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:04,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:04,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-16 11:54:04,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960957707] [2022-11-16 11:54:04,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:04,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 11:54:04,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:04,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 11:54:04,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:54:04,304 INFO L87 Difference]: Start difference. First operand 422 states and 510 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-16 11:54:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:06,253 INFO L93 Difference]: Finished difference Result 448 states and 547 transitions. [2022-11-16 11:54:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:54:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) Word has length 66 [2022-11-16 11:54:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:06,255 INFO L225 Difference]: With dead ends: 448 [2022-11-16 11:54:06,255 INFO L226 Difference]: Without dead ends: 448 [2022-11-16 11:54:06,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:54:06,256 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 31 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:06,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 917 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-16 11:54:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-11-16 11:54:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 439. [2022-11-16 11:54:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 301 states have (on average 1.5980066445182723) internal successors, (481), 399 states have internal predecessors, (481), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 535 transitions. [2022-11-16 11:54:06,262 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 535 transitions. Word has length 66 [2022-11-16 11:54:06,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:06,263 INFO L495 AbstractCegarLoop]: Abstraction has 439 states and 535 transitions. [2022-11-16 11:54:06,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 1 states have call successors, (7), 1 states have call predecessors, (7), 3 states have return successors, (8), 2 states have call predecessors, (8), 1 states have call successors, (8) [2022-11-16 11:54:06,263 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 535 transitions. [2022-11-16 11:54:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-16 11:54:06,264 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:06,264 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:06,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (114)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:06,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:06,478 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:06,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1026957458, now seen corresponding path program 1 times [2022-11-16 11:54:06,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:06,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [409769425] [2022-11-16 11:54:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:06,479 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:06,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:06,479 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:06,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Waiting until timeout for monitored process [2022-11-16 11:54:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:06,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:54:06,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:54:07,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:54:08,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:08,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [409769425] [2022-11-16 11:54:08,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [409769425] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:08,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:08,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:54:08,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501743032] [2022-11-16 11:54:08,099 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:08,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:54:08,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:54:08,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:08,100 INFO L87 Difference]: Start difference. First operand 439 states and 535 transitions. Second operand has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:54:08,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:08,422 INFO L93 Difference]: Finished difference Result 534 states and 607 transitions. [2022-11-16 11:54:08,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:54:08,423 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 67 [2022-11-16 11:54:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:08,424 INFO L225 Difference]: With dead ends: 534 [2022-11-16 11:54:08,424 INFO L226 Difference]: Without dead ends: 534 [2022-11-16 11:54:08,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:08,424 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 276 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 1876 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:08,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 1876 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-11-16 11:54:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-11-16 11:54:08,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 441. [2022-11-16 11:54:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 303 states have (on average 1.5940594059405941) internal successors, (483), 401 states have internal predecessors, (483), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 537 transitions. [2022-11-16 11:54:08,431 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 537 transitions. Word has length 67 [2022-11-16 11:54:08,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:08,432 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 537 transitions. [2022-11-16 11:54:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 9.777777777777779) internal successors, (88), 8 states have internal predecessors, (88), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:54:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 537 transitions. [2022-11-16 11:54:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-16 11:54:08,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:08,432 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:08,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (115)] Ended with exit code 0 [2022-11-16 11:54:08,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:08,633 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1770909708, now seen corresponding path program 1 times [2022-11-16 11:54:08,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:08,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827626677] [2022-11-16 11:54:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:08,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:08,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:08,635 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:08,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Waiting until timeout for monitored process [2022-11-16 11:54:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:09,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-16 11:54:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:09,052 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:54:09,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:09,477 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:09,477 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:54:09,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:09,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:09,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2022-11-16 11:54:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:10,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-16 11:54:10,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:11,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:11,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:11,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2022-11-16 11:54:11,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-16 11:54:11,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:54:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:54:11,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:12,744 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827626677] [2022-11-16 11:54:12,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827626677] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:12,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1623144770] [2022-11-16 11:54:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:12,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:54:12,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:54:12,745 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:54:12,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (117)] Waiting until timeout for monitored process [2022-11-16 11:54:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:13,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-16 11:54:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:13,631 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:54:13,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:13,896 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:13,896 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:54:14,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:14,276 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:14,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2022-11-16 11:54:14,887 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-16 11:54:14,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 24 [2022-11-16 11:54:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:15,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2022-11-16 11:54:16,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-16 11:54:16,810 INFO L321 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-16 11:54:16,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 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 [2022-11-16 11:54:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 34 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-16 11:54:17,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:18,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1623144770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:18,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:18,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 29 [2022-11-16 11:54:18,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950574826] [2022-11-16 11:54:18,151 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:18,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 11:54:18,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:18,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 11:54:18,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2022-11-16 11:54:18,152 INFO L87 Difference]: Start difference. First operand 441 states and 537 transitions. Second operand has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 25 states have internal predecessors, (79), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 11:54:22,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:22,509 INFO L93 Difference]: Finished difference Result 446 states and 543 transitions. [2022-11-16 11:54:22,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-16 11:54:22,510 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 25 states have internal predecessors, (79), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 68 [2022-11-16 11:54:22,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:22,512 INFO L225 Difference]: With dead ends: 446 [2022-11-16 11:54:22,512 INFO L226 Difference]: Without dead ends: 446 [2022-11-16 11:54:22,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=440, Invalid=2010, Unknown=0, NotChecked=0, Total=2450 [2022-11-16 11:54:22,512 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 113 mSDsluCounter, 1571 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:22,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1828 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 857 Invalid, 0 Unknown, 697 Unchecked, 2.9s Time] [2022-11-16 11:54:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-16 11:54:22,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 442. [2022-11-16 11:54:22,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 304 states have (on average 1.5921052631578947) internal successors, (484), 402 states have internal predecessors, (484), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:22,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 538 transitions. [2022-11-16 11:54:22,519 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 538 transitions. Word has length 68 [2022-11-16 11:54:22,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:22,519 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 538 transitions. [2022-11-16 11:54:22,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 25 states have internal predecessors, (79), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-16 11:54:22,519 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 538 transitions. [2022-11-16 11:54:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:54:22,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:22,520 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:22,535 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (116)] Ended with exit code 0 [2022-11-16 11:54:22,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (117)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:22,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt [2022-11-16 11:54:22,935 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:22,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1956236157, now seen corresponding path program 2 times [2022-11-16 11:54:22,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:22,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1137719223] [2022-11-16 11:54:22,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 11:54:22,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:22,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:22,937 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:22,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Waiting until timeout for monitored process [2022-11-16 11:54:23,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-16 11:54:23,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 11:54:23,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:54:23,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:23,223 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:54:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 11:54:23,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:23,232 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:23,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1137719223] [2022-11-16 11:54:23,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1137719223] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:23,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:23,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:54:23,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580995082] [2022-11-16 11:54:23,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:23,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:23,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:23,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:23,234 INFO L87 Difference]: Start difference. First operand 442 states and 538 transitions. Second operand has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:54:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:23,652 INFO L93 Difference]: Finished difference Result 455 states and 556 transitions. [2022-11-16 11:54:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:23,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-11-16 11:54:23,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:23,654 INFO L225 Difference]: With dead ends: 455 [2022-11-16 11:54:23,654 INFO L226 Difference]: Without dead ends: 455 [2022-11-16 11:54:23,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:23,655 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 40 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:23,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 484 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-16 11:54:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-11-16 11:54:23,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 441. [2022-11-16 11:54:23,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 304 states have (on average 1.5888157894736843) internal successors, (483), 401 states have internal predecessors, (483), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:23,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 537 transitions. [2022-11-16 11:54:23,662 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 537 transitions. Word has length 69 [2022-11-16 11:54:23,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:23,662 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 537 transitions. [2022-11-16 11:54:23,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 18.5) internal successors, (37), 3 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:54:23,662 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 537 transitions. [2022-11-16 11:54:23,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:54:23,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:23,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:23,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (118)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:23,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:23,863 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1956236158, now seen corresponding path program 1 times [2022-11-16 11:54:23,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:23,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985039769] [2022-11-16 11:54:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:23,864 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:23,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:23,865 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:23,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Waiting until timeout for monitored process [2022-11-16 11:54:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:24,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:54:24,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-11-16 11:54:24,316 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:24,316 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:24,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985039769] [2022-11-16 11:54:24,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985039769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:24,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:24,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-16 11:54:24,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823722324] [2022-11-16 11:54:24,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 11:54:24,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 11:54:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 11:54:24,318 INFO L87 Difference]: Start difference. First operand 441 states and 537 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:54:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:24,506 INFO L93 Difference]: Finished difference Result 459 states and 560 transitions. [2022-11-16 11:54:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 11:54:24,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 69 [2022-11-16 11:54:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:24,515 INFO L225 Difference]: With dead ends: 459 [2022-11-16 11:54:24,516 INFO L226 Difference]: Without dead ends: 457 [2022-11-16 11:54:24,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 11:54:24,516 INFO L413 NwaCegarLoop]: 309 mSDtfsCounter, 2 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:24,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 920 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 11:54:24,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-11-16 11:54:24,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 445. [2022-11-16 11:54:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 308 states have (on average 1.5909090909090908) internal successors, (490), 405 states have internal predecessors, (490), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 544 transitions. [2022-11-16 11:54:24,524 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 544 transitions. Word has length 69 [2022-11-16 11:54:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:24,525 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 544 transitions. [2022-11-16 11:54:24,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:54:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 544 transitions. [2022-11-16 11:54:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 11:54:24,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:24,526 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:24,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (119)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:24,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:24,741 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:24,742 INFO L85 PathProgramCache]: Analyzing trace with hash 625771301, now seen corresponding path program 1 times [2022-11-16 11:54:24,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731967326] [2022-11-16 11:54:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:24,744 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:24,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Waiting until timeout for monitored process [2022-11-16 11:54:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:25,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 11:54:25,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:25,262 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:54:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-11-16 11:54:25,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:54:25,282 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:25,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731967326] [2022-11-16 11:54:25,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1731967326] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:54:25,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:54:25,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:54:25,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491437262] [2022-11-16 11:54:25,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:54:25,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:54:25,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:54:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:25,283 INFO L87 Difference]: Start difference. First operand 445 states and 544 transitions. Second operand has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:54:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:25,800 INFO L93 Difference]: Finished difference Result 444 states and 543 transitions. [2022-11-16 11:54:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:54:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 70 [2022-11-16 11:54:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:25,802 INFO L225 Difference]: With dead ends: 444 [2022-11-16 11:54:25,802 INFO L226 Difference]: Without dead ends: 444 [2022-11-16 11:54:25,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:54:25,802 INFO L413 NwaCegarLoop]: 308 mSDtfsCounter, 1 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:25,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 531 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-16 11:54:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-11-16 11:54:25,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2022-11-16 11:54:25,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 308 states have (on average 1.5876623376623376) internal successors, (489), 404 states have internal predecessors, (489), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:25,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 543 transitions. [2022-11-16 11:54:25,807 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 543 transitions. Word has length 70 [2022-11-16 11:54:25,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:25,807 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 543 transitions. [2022-11-16 11:54:25,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 19.0) internal successors, (38), 3 states have internal predecessors, (38), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-11-16 11:54:25,807 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 543 transitions. [2022-11-16 11:54:25,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-16 11:54:25,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:25,808 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:25,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (120)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:26,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:26,019 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:26,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:26,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1037166698, now seen corresponding path program 1 times [2022-11-16 11:54:26,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:26,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [480878829] [2022-11-16 11:54:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:26,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:26,021 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:26,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Waiting until timeout for monitored process [2022-11-16 11:54:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:26,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 11:54:26,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-16 11:54:27,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:27,686 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-11-16 11:54:27,686 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:27,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [480878829] [2022-11-16 11:54:27,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [480878829] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 11:54:27,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:27,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 9 [2022-11-16 11:54:27,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678118799] [2022-11-16 11:54:27,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:27,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-16 11:54:27,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:27,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-16 11:54:27,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:27,688 INFO L87 Difference]: Start difference. First operand 444 states and 543 transitions. Second operand has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:54:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:54:27,997 INFO L93 Difference]: Finished difference Result 539 states and 615 transitions. [2022-11-16 11:54:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 11:54:27,998 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 70 [2022-11-16 11:54:27,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:54:27,999 INFO L225 Difference]: With dead ends: 539 [2022-11-16 11:54:27,999 INFO L226 Difference]: Without dead ends: 539 [2022-11-16 11:54:27,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-16 11:54:28,000 INFO L413 NwaCegarLoop]: 402 mSDtfsCounter, 248 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 1629 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 11:54:28,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [252 Valid, 1629 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-11-16 11:54:28,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-16 11:54:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 446. [2022-11-16 11:54:28,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 310 states have (on average 1.5838709677419356) internal successors, (491), 406 states have internal predecessors, (491), 23 states have call successors, (23), 20 states have call predecessors, (23), 24 states have return successors, (31), 23 states have call predecessors, (31), 23 states have call successors, (31) [2022-11-16 11:54:28,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 545 transitions. [2022-11-16 11:54:28,008 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 545 transitions. Word has length 70 [2022-11-16 11:54:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:54:28,008 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 545 transitions. [2022-11-16 11:54:28,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 10.444444444444445) internal successors, (94), 8 states have internal predecessors, (94), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2022-11-16 11:54:28,009 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 545 transitions. [2022-11-16 11:54:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-16 11:54:28,009 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:54:28,009 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:54:28,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (121)] Forceful destruction successful, exit code 0 [2022-11-16 11:54:28,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:28,222 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2022-11-16 11:54:28,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:54:28,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2087396141, now seen corresponding path program 1 times [2022-11-16 11:54:28,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-16 11:54:28,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076298946] [2022-11-16 11:54:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:28,224 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-16 11:54:28,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat [2022-11-16 11:54:28,225 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-16 11:54:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (122)] Waiting until timeout for monitored process [2022-11-16 11:54:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:28,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-16 11:54:28,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:28,781 INFO L350 Elim1Store]: Elim1 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 7 [2022-11-16 11:54:28,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:29,182 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:29,182 INFO L350 Elim1Store]: Elim1 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 19 treesize of output 27 [2022-11-16 11:54:29,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:29,584 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:29,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2022-11-16 11:54:29,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:30,044 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-16 11:54:30,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 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 [2022-11-16 11:54:30,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:30,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 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 [2022-11-16 11:54:30,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 11:54:31,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:31,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 27 [2022-11-16 11:54:31,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-16 11:54:32,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-16 11:54:32,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 [2022-11-16 11:54:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 14 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-16 11:54:32,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:33,733 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-16 11:54:33,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076298946] [2022-11-16 11:54:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076298946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1142209718] [2022-11-16 11:54:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:54:33,734 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-11-16 11:54:33,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 [2022-11-16 11:54:33,735 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-11-16 11:54:33,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17926c1f-787a-41ef-86c7-e23f9d82884c/bin/uautomizer-tPACEb0tL8/cvc4 --incremental --print-success --lang smt (123)] Waiting until timeout for monitored process [2022-11-16 11:54:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:54:34,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-16 11:54:34,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:54:34,858 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-16 11:54:34,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 30 [2022-11-16 11:54:35,290 INFO L321 Elim1Store]: treesize reduction 64, result has 26.4 percent of original size [2022-11-16 11:54:35,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2022-11-16 11:54:35,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-16 11:54:35,897 INFO L321 Elim1Store]: treesize reduction 22, result has 37.1 percent of original size [2022-11-16 11:54:35,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 31 [2022-11-16 11:54:36,457 INFO L321 Elim1Store]: treesize reduction 96, result has 26.2 percent of original size [2022-11-16 11:54:36,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 38 treesize of output 69 [2022-11-16 11:54:37,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-16 11:54:37,307 INFO L321 Elim1Store]: treesize reduction 22, result has 37.1 percent of original size [2022-11-16 11:54:37,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 31 [2022-11-16 11:54:37,880 INFO L321 Elim1Store]: treesize reduction 96, result has 26.2 percent of original size [2022-11-16 11:54:37,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 38 treesize of output 69 [2022-11-16 11:54:38,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:38,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:54:39,077 INFO L321 Elim1Store]: treesize reduction 22, result has 37.1 percent of original size [2022-11-16 11:54:39,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 31 [2022-11-16 11:54:39,706 INFO L321 Elim1Store]: treesize reduction 96, result has 26.2 percent of original size [2022-11-16 11:54:39,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 38 treesize of output 69 [2022-11-16 11:54:41,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-16 11:54:41,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-16 11:54:41,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 7 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 [2022-11-16 11:54:41,514 INFO L321 Elim1Store]: treesize reduction 66, result has 34.0 percent of original size [2022-11-16 11:54:41,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 66 [2022-11-16 11:54:41,662 INFO L350 Elim1Store]: Elim1 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 [2022-11-16 11:54:42,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-11-16 11:54:43,133 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-16 11:54:43,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2022-11-16 11:54:44,847 INFO L321 Elim1Store]: treesize reduction 34, result has 40.4 percent of original size [2022-11-16 11:54:44,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 54 [2022-11-16 11:54:45,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 7 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 [2022-11-16 11:54:45,826 INFO L321 Elim1Store]: treesize reduction 32, result has 27.3 percent of original size [2022-11-16 11:54:45,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 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 [2022-11-16 11:54:46,222 INFO L321 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2022-11-16 11:54:46,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 34 [2022-11-16 11:54:46,369 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:54:46,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 11:54:48,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1142209718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:54:48,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-16 11:54:48,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28] total 50 [2022-11-16 11:54:48,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420210987] [2022-11-16 11:54:48,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-16 11:54:48,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-16 11:54:48,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-16 11:54:48,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-16 11:54:48,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=3930, Unknown=0, NotChecked=0, Total=4422 [2022-11-16 11:54:48,819 INFO L87 Difference]: Start difference. First operand 446 states and 545 transitions. Second operand has 51 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 40 states have internal predecessors, (103), 11 states have call successors, (12), 5 states have call predecessors, (12), 8 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12)