./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:08:44,959 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:08:45,067 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 05:08:45,075 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:08:45,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:08:45,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:08:45,124 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:08:45,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:08:45,126 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:08:45,131 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:08:45,131 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:08:45,133 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:08:45,133 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:08:45,135 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 05:08:45,135 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:08:45,136 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:08:45,136 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 05:08:45,137 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 05:08:45,137 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:08:45,138 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 05:08:45,138 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 05:08:45,139 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 05:08:45,140 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:08:45,140 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:08:45,141 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:08:45,142 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:08:45,142 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:08:45,143 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:08:45,143 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:08:45,144 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:08:45,145 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:08:45,146 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:08:45,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:08:45,146 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:08:45,146 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:08:45,147 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:08:45,147 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:08:45,147 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:08:45,148 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:08:45,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:08:45,149 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:08:45,149 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:08:45,149 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 05:08:45,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 05:08:45,150 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:08:45,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:08:45,151 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2023-11-19 05:08:45,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:08:45,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:08:45,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:08:45,496 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:08:45,497 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:08:45,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-19 05:08:48,580 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:08:48,831 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:08:48,832 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-19 05:08:48,841 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data/e95d059b3/bb614906104b4416bbe6505620ba1374/FLAG843a4e53e [2023-11-19 05:08:48,856 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data/e95d059b3/bb614906104b4416bbe6505620ba1374 [2023-11-19 05:08:48,859 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:08:48,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:08:48,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:08:48,863 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:08:48,868 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:08:48,869 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:08:48" (1/1) ... [2023-11-19 05:08:48,870 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@404ab011 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:48, skipping insertion in model container [2023-11-19 05:08:48,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:08:48" (1/1) ... [2023-11-19 05:08:48,897 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:08:49,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:08:49,094 ERROR L324 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) [2023-11-19 05:08:49,095 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@673def72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:49, skipping insertion in model container [2023-11-19 05:08:49,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:08:49,095 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 05:08:49,097 INFO L158 Benchmark]: Toolchain (without parser) took 235.77ms. Allocated memory is still 132.1MB. Free memory was 92.6MB in the beginning and 83.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 05:08:49,098 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 132.1MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 05:08:49,099 INFO L158 Benchmark]: CACSL2BoogieTranslator took 233.04ms. Allocated memory is still 132.1MB. Free memory was 92.6MB in the beginning and 83.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-19 05:08:49,100 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 132.1MB. Free memory is still 77.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 233.04ms. Allocated memory is still 132.1MB. Free memory was 92.6MB in the beginning and 83.0MB in the end (delta: 9.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 102]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ --witnessprinter.witness.filename witness --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 05:08:51,596 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 05:08:51,728 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-19 05:08:51,738 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 05:08:51,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 05:08:51,785 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 05:08:51,786 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 05:08:51,786 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 05:08:51,787 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 05:08:51,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 05:08:51,793 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 05:08:51,793 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 05:08:51,793 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 05:08:51,795 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 05:08:51,796 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 05:08:51,796 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 05:08:51,797 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 05:08:51,797 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 05:08:51,798 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 05:08:51,799 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 05:08:51,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 05:08:51,800 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 05:08:51,800 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 05:08:51,801 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 05:08:51,801 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 05:08:51,801 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 05:08:51,802 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 05:08:51,802 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 05:08:51,802 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 05:08:51,803 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 05:08:51,804 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 05:08:51,805 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 05:08:51,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 05:08:51,805 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 05:08:51,805 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 05:08:51,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 05:08:51,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:08:51,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 05:08:51,807 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 05:08:51,807 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 05:08:51,808 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 05:08:51,808 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 05:08:51,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 05:08:51,808 INFO L153 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_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2023-11-19 05:08:52,249 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 05:08:52,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 05:08:52,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 05:08:52,287 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 05:08:52,287 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 05:08:52,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-19 05:08:55,470 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 05:08:55,772 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 05:08:55,773 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2023-11-19 05:08:55,782 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data/8c50c3dd9/e160ceee7f644d719691dac291a8d3a6/FLAG45dc7d256 [2023-11-19 05:08:55,798 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/data/8c50c3dd9/e160ceee7f644d719691dac291a8d3a6 [2023-11-19 05:08:55,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 05:08:55,802 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 05:08:55,804 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 05:08:55,804 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 05:08:55,809 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 05:08:55,810 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:08:55" (1/1) ... [2023-11-19 05:08:55,812 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c171bcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:55, skipping insertion in model container [2023-11-19 05:08:55,812 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:08:55" (1/1) ... [2023-11-19 05:08:55,837 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:08:56,084 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:08:56,108 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 05:08:56,121 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 05:08:56,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:08:56,172 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 05:08:56,214 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 05:08:56,240 INFO L206 MainTranslator]: Completed translation [2023-11-19 05:08:56,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56 WrapperNode [2023-11-19 05:08:56,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 05:08:56,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 05:08:56,244 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 05:08:56,244 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 05:08:56,252 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,279 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,321 INFO L138 Inliner]: procedures = 26, calls = 36, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 179 [2023-11-19 05:08:56,322 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 05:08:56,323 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 05:08:56,323 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 05:08:56,324 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 05:08:56,333 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,354 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,356 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,366 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,384 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,386 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,395 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,399 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 05:08:56,403 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 05:08:56,403 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 05:08:56,404 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 05:08:56,405 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (1/1) ... [2023-11-19 05:08:56,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 05:08:56,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:08:56,442 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 05:08:56,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 05:08:56,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 05:08:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-19 05:08:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 05:08:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-19 05:08:56,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 05:08:56,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 05:08:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 05:08:56,543 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 05:08:56,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 05:08:56,560 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 05:08:56,561 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 05:08:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 05:08:56,561 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 05:08:56,563 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 05:08:56,702 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 05:08:56,704 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 05:08:57,272 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 05:08:57,284 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 05:08:57,284 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-19 05:08:57,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:08:57 BoogieIcfgContainer [2023-11-19 05:08:57,289 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 05:08:57,291 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 05:08:57,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 05:08:57,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 05:08:57,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:08:55" (1/3) ... [2023-11-19 05:08:57,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231982e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:08:57, skipping insertion in model container [2023-11-19 05:08:57,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:08:56" (2/3) ... [2023-11-19 05:08:57,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231982e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:08:57, skipping insertion in model container [2023-11-19 05:08:57,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:08:57" (3/3) ... [2023-11-19 05:08:57,298 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2023-11-19 05:08:57,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 05:08:57,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-19 05:08:57,316 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 05:08:57,511 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 05:08:57,551 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-19 05:08:57,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 235 places, 247 transitions, 508 flow [2023-11-19 05:08:57,569 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 235 places, 247 transitions, 508 flow [2023-11-19 05:08:57,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 235 places, 247 transitions, 508 flow [2023-11-19 05:08:57,666 INFO L124 PetriNetUnfolderBase]: 19/245 cut-off events. [2023-11-19 05:08:57,666 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 05:08:57,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 245 events. 19/245 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 379 event pairs, 0 based on Foata normal form. 0/196 useless extension candidates. Maximal degree in co-relation 166. Up to 3 conditions per place. [2023-11-19 05:08:57,689 INFO L119 LiptonReduction]: Number of co-enabled transitions 5896 [2023-11-19 05:09:31,371 INFO L134 LiptonReduction]: Checked pairs total: 9521 [2023-11-19 05:09:31,371 INFO L136 LiptonReduction]: Total number of compositions: 288 [2023-11-19 05:09:31,379 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 58 places, 57 transitions, 128 flow [2023-11-19 05:09:31,451 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 777 states, 491 states have (on average 4.346232179226069) internal successors, (2134), 776 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:31,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 05:09:31,482 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;@4d794bc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 05:09:31,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-11-19 05:09:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand has 777 states, 491 states have (on average 4.346232179226069) internal successors, (2134), 776 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-19 05:09:31,497 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:31,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-19 05:09:31,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-19 05:09:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 31338, now seen corresponding path program 1 times [2023-11-19 05:09:31,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:09:31,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283995201] [2023-11-19 05:09:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:31,515 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 [2023-11-19 05:09:31,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:09:31,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:09:31,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:31,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:31,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 05:09:31,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:31,767 INFO L378 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 [2023-11-19 05:09:31,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:31,787 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:31,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:31,806 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:31,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:31,832 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:31,848 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:31,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:31,857 INFO L378 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 1 [2023-11-19 05:09:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:31,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:31,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:09:31,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283995201] [2023-11-19 05:09:31,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1283995201] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:31,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:31,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 05:09:31,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919022125] [2023-11-19 05:09:31,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:31,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:31,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:09:31,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:31,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:09:31,921 INFO L87 Difference]: Start difference. First operand has 777 states, 491 states have (on average 4.346232179226069) internal successors, (2134), 776 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:32,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:32,350 INFO L93 Difference]: Finished difference Result 524 states and 1417 transitions. [2023-11-19 05:09:32,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:32,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-19 05:09:32,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:32,380 INFO L225 Difference]: With dead ends: 524 [2023-11-19 05:09:32,380 INFO L226 Difference]: Without dead ends: 524 [2023-11-19 05:09:32,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:09:32,385 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:32,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 05:09:32,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-19 05:09:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 522. [2023-11-19 05:09:32,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 353 states have (on average 4.014164305949008) internal successors, (1417), 521 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1417 transitions. [2023-11-19 05:09:32,472 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1417 transitions. Word has length 2 [2023-11-19 05:09:32,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:32,477 INFO L495 AbstractCegarLoop]: Abstraction has 522 states and 1417 transitions. [2023-11-19 05:09:32,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1417 transitions. [2023-11-19 05:09:32,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-19 05:09:32,477 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:32,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-19 05:09:32,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:32,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:09:32,679 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-19 05:09:32,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:32,679 INFO L85 PathProgramCache]: Analyzing trace with hash 31340, now seen corresponding path program 1 times [2023-11-19 05:09:32,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:09:32,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1490948971] [2023-11-19 05:09:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:32,681 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 [2023-11-19 05:09:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:09:32,684 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:09:32,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:32,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 05:09:32,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:32,798 INFO L378 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 [2023-11-19 05:09:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:32,810 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:32,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:32,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:32,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:32,844 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:32,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:32,854 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:32,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:32,860 INFO L378 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 1 [2023-11-19 05:09:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:32,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:32,865 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:09:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1490948971] [2023-11-19 05:09:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1490948971] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:32,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 05:09:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046427607] [2023-11-19 05:09:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:32,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:32,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:09:32,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:09:32,869 INFO L87 Difference]: Start difference. First operand 522 states and 1417 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:33,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:33,186 INFO L93 Difference]: Finished difference Result 520 states and 1413 transitions. [2023-11-19 05:09:33,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:33,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2023-11-19 05:09:33,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:33,193 INFO L225 Difference]: With dead ends: 520 [2023-11-19 05:09:33,193 INFO L226 Difference]: Without dead ends: 520 [2023-11-19 05:09:33,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:09:33,195 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:33,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:09:33,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2023-11-19 05:09:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2023-11-19 05:09:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 353 states have (on average 4.002832861189802) internal successors, (1413), 519 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:33,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 1413 transitions. [2023-11-19 05:09:33,260 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 1413 transitions. Word has length 2 [2023-11-19 05:09:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:33,261 INFO L495 AbstractCegarLoop]: Abstraction has 520 states and 1413 transitions. [2023-11-19 05:09:33,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 1413 transitions. [2023-11-19 05:09:33,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 05:09:33,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:33,262 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 05:09:33,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:33,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:09:33,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-19 05:09:33,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash 975846, now seen corresponding path program 1 times [2023-11-19 05:09:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:09:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [132349889] [2023-11-19 05:09:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:33,468 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 [2023-11-19 05:09:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:09:33,469 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:09:33,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:33,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:33,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:09:33,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:33,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-19 05:09:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,584 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:33,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,597 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,604 INFO L378 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 1 [2023-11-19 05:09:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,613 INFO L378 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 1 [2023-11-19 05:09:33,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,624 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:33,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:33,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:33,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:09:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [132349889] [2023-11-19 05:09:33,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [132349889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:33,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [374815440] [2023-11-19 05:09:33,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:33,778 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:09:33,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:09:33,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:09:33,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-19 05:09:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:33,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:09:33,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:33,938 INFO L378 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 11 treesize of output 5 [2023-11-19 05:09:33,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,948 INFO L378 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 1 [2023-11-19 05:09:33,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,961 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:33,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:33,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,989 INFO L378 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 1 [2023-11-19 05:09:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:33,999 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:34,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:34,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:34,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [374815440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:34,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613959295] [2023-11-19 05:09:34,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:34,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:34,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:34,053 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:34,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 05:09:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:34,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 05:09:34,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:34,158 INFO L378 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 [2023-11-19 05:09:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:34,170 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:34,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:34,186 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:34,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:34,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:34,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:34,222 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:34,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:34,229 INFO L378 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 1 [2023-11-19 05:09:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:34,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:34,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:34,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613959295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:34,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:09:34,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2, 2, 2, 2] total 4 [2023-11-19 05:09:34,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742788394] [2023-11-19 05:09:34,303 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:09:34,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:09:34,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:09:34,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:09:34,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:34,305 INFO L87 Difference]: Start difference. First operand 520 states and 1413 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:35,921 INFO L93 Difference]: Finished difference Result 526 states and 1431 transitions. [2023-11-19 05:09:35,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:09:35,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 05:09:35,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:35,927 INFO L225 Difference]: With dead ends: 526 [2023-11-19 05:09:35,928 INFO L226 Difference]: Without dead ends: 526 [2023-11-19 05:09:35,928 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:09:35,929 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:35,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 05:09:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-19 05:09:35,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-11-19 05:09:35,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 359 states have (on average 3.986072423398329) internal successors, (1431), 525 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:35,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1431 transitions. [2023-11-19 05:09:35,958 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1431 transitions. Word has length 3 [2023-11-19 05:09:35,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:35,958 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1431 transitions. [2023-11-19 05:09:35,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1431 transitions. [2023-11-19 05:09:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 05:09:35,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:35,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-19 05:09:35,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:36,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:36,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2023-11-19 05:09:36,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt [2023-11-19 05:09:36,581 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-19 05:09:36,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash 977030, now seen corresponding path program 1 times [2023-11-19 05:09:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:09:36,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1668781153] [2023-11-19 05:09:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:36,583 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 [2023-11-19 05:09:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:09:36,584 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:09:36,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:36,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:36,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 05:09:36,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:36,673 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 05:09:36,674 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:09:36,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1668781153] [2023-11-19 05:09:36,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1668781153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 05:09:36,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 05:09:36,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 05:09:36,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276206953] [2023-11-19 05:09:36,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 05:09:36,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 05:09:36,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:09:36,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 05:09:36,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:09:36,676 INFO L87 Difference]: Start difference. First operand 526 states and 1431 transitions. Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:37,023 INFO L93 Difference]: Finished difference Result 526 states and 1427 transitions. [2023-11-19 05:09:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 05:09:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-19 05:09:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:37,030 INFO L225 Difference]: With dead ends: 526 [2023-11-19 05:09:37,030 INFO L226 Difference]: Without dead ends: 526 [2023-11-19 05:09:37,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 05:09:37,031 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:37,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 05:09:37,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-19 05:09:37,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-11-19 05:09:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 359 states have (on average 3.9749303621169916) internal successors, (1427), 525 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1427 transitions. [2023-11-19 05:09:37,054 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1427 transitions. Word has length 3 [2023-11-19 05:09:37,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:37,055 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1427 transitions. [2023-11-19 05:09:37,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1427 transitions. [2023-11-19 05:09:37,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-19 05:09:37,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:37,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 05:09:37,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:37,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 05:09:37,264 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-19 05:09:37,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:37,265 INFO L85 PathProgramCache]: Analyzing trace with hash 937960617, now seen corresponding path program 1 times [2023-11-19 05:09:37,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:09:37,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1656474675] [2023-11-19 05:09:37,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:37,266 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 [2023-11-19 05:09:37,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:09:37,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:09:37,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:37,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:09:37,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:09:37,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:09:37,449 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:09:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1656474675] [2023-11-19 05:09:37,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1656474675] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1836263656] [2023-11-19 05:09:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:09:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:09:37,452 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:09:37,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-11-19 05:09:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:37,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:09:37,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:09:37,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:09:37,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1836263656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209546385] [2023-11-19 05:09:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 05:09:37,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:37,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:37,649 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:37,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 05:09:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 05:09:37,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 05:09:37,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:37,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:09:37,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 05:09:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209546385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:37,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:09:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 3, 3] total 5 [2023-11-19 05:09:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020383549] [2023-11-19 05:09:37,769 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:09:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 05:09:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:09:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 05:09:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 05:09:37,770 INFO L87 Difference]: Start difference. First operand 526 states and 1427 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 05:09:38,280 INFO L93 Difference]: Finished difference Result 526 states and 1415 transitions. [2023-11-19 05:09:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 05:09:38,281 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-19 05:09:38,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 05:09:38,286 INFO L225 Difference]: With dead ends: 526 [2023-11-19 05:09:38,286 INFO L226 Difference]: Without dead ends: 526 [2023-11-19 05:09:38,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-19 05:09:38,287 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 05:09:38,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 3 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 05:09:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-19 05:09:38,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526. [2023-11-19 05:09:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 359 states have (on average 3.9415041782729805) internal successors, (1415), 525 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:38,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1415 transitions. [2023-11-19 05:09:38,309 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1415 transitions. Word has length 5 [2023-11-19 05:09:38,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 05:09:38,309 INFO L495 AbstractCegarLoop]: Abstraction has 526 states and 1415 transitions. [2023-11-19 05:09:38,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 05:09:38,310 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1415 transitions. [2023-11-19 05:09:38,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 05:09:38,310 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 05:09:38,310 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1] [2023-11-19 05:09:38,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:38,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:38,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 05:09:38,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:38,914 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-11-19 05:09:38,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 05:09:38,914 INFO L85 PathProgramCache]: Analyzing trace with hash -989005462, now seen corresponding path program 2 times [2023-11-19 05:09:38,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 05:09:38,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307973280] [2023-11-19 05:09:38,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 05:09:38,915 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 [2023-11-19 05:09:38,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 05:09:38,916 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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) [2023-11-19 05:09:38,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/mathsat -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 [2023-11-19 05:09:39,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 05:09:39,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:09:39,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:09:39,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:39,037 INFO L378 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 11 treesize of output 5 [2023-11-19 05:09:39,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:39,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,070 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:39,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,076 INFO L378 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 1 [2023-11-19 05:09:39,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,084 INFO L378 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 1 [2023-11-19 05:09:39,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,095 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:39,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:39,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:39,635 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 05:09:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307973280] [2023-11-19 05:09:39,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307973280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:39,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1001145088] [2023-11-19 05:09:39,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 05:09:39,636 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 05:09:39,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 05:09:39,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 05:09:39,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-11-19 05:09:39,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 05:09:39,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:09:39,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 05:09:39,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:39,855 INFO L378 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 [2023-11-19 05:09:39,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,867 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:39,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,877 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:39,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,882 INFO L378 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 1 [2023-11-19 05:09:39,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,894 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:39,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:39,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:39,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:40,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1001145088] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:40,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488022727] [2023-11-19 05:09:40,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 05:09:40,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 05:09:40,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 05:09:40,037 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 05:09:40,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_83344c76-63ee-4ca5-bf92-82c5b3ffc261/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 05:09:40,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 05:09:40,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 05:09:40,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 05:09:40,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 05:09:40,175 INFO L378 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 11 treesize of output 5 [2023-11-19 05:09:40,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:40,184 INFO L378 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 1 [2023-11-19 05:09:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:40,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-19 05:09:40,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:40,216 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:40,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:40,224 INFO L378 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 1 [2023-11-19 05:09:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 05:09:40,234 INFO L378 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 11 treesize of output 1 [2023-11-19 05:09:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:40,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 05:09:41,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 05:09:41,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488022727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 05:09:41,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 05:09:41,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2023-11-19 05:09:41,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51182091] [2023-11-19 05:09:41,120 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 05:09:41,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 05:09:41,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 05:09:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 05:09:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2023-11-19 05:09:41,121 INFO L87 Difference]: Start difference. First operand 526 states and 1415 transitions. Second operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)