./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i --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_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 f002fb5adc832f6023a0c06b1c5ecdb23a860b09113c230254f6be0919311eb2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:55:14,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:55:14,747 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-19 04:55:14,753 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:55:14,753 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:55:14,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:55:14,783 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:55:14,784 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:55:14,784 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:55:14,785 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:55:14,786 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:55:14,787 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:55:14,787 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:55:14,788 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:55:14,788 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:55:14,789 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:55:14,789 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:55:14,790 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:55:14,791 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:55:14,791 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:55:14,792 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:55:14,798 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:55:14,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:55:14,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:55:14,804 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:55:14,804 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:55:14,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:55:14,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:55:14,806 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:55:14,806 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:55:14,807 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:55:14,808 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:55:14,808 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:55:14,809 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:55:14,809 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:55:14,809 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:55:14,809 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:55:14,810 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:55:14,810 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:55:14,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:55:14,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:55:14,811 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:55:14,811 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:55:14,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:55:14,812 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:55:14,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:55:14,813 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_efcc2753-15e8-44dc-a18f-2a7df24e8688/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f002fb5adc832f6023a0c06b1c5ecdb23a860b09113c230254f6be0919311eb2 [2023-11-19 04:55:15,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:55:15,091 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:55:15,093 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:55:15,095 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:55:15,095 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:55:15,096 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i [2023-11-19 04:55:18,310 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:55:18,641 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:55:18,642 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i [2023-11-19 04:55:18,668 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data/b0253f02a/d672c7862724454fa8ae37069e2d2924/FLAG14ddd698a [2023-11-19 04:55:18,692 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data/b0253f02a/d672c7862724454fa8ae37069e2d2924 [2023-11-19 04:55:18,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:55:18,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:55:18,702 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:55:18,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:55:18,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:55:18,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:55:18" (1/1) ... [2023-11-19 04:55:18,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30b8c791 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:18, skipping insertion in model container [2023-11-19 04:55:18,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:55:18" (1/1) ... [2023-11-19 04:55:18,776 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:55:19,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:55:19,197 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 04:55:19,198 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5c84a885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:19, skipping insertion in model container [2023-11-19 04:55:19,198 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:55:19,198 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-19 04:55:19,200 INFO L158 Benchmark]: Toolchain (without parser) took 498.26ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 85.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-19 04:55:19,201 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 146.8MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:55:19,201 INFO L158 Benchmark]: CACSL2BoogieTranslator took 495.71ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 85.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-19 04:55:19,203 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 146.8MB. Free memory is still 86.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 495.71ms. Allocated memory is still 146.8MB. Free memory was 99.5MB in the beginning and 85.7MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 f002fb5adc832f6023a0c06b1c5ecdb23a860b09113c230254f6be0919311eb2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:55:21,614 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:55:21,752 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-19 04:55:21,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:55:21,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:55:21,803 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:55:21,803 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:55:21,804 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:55:21,805 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:55:21,809 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:55:21,810 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:55:21,810 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:55:21,811 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:55:21,812 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:55:21,813 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:55:21,813 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:55:21,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:55:21,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:55:21,815 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:55:21,816 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:55:21,817 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:55:21,817 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:55:21,818 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:55:21,818 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:55:21,818 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:55:21,819 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:55:21,819 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:55:21,820 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 04:55:21,820 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-19 04:55:21,820 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-19 04:55:21,822 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:55:21,822 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:55:21,822 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:55:21,823 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:55:21,823 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 04:55:21,823 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:55:21,824 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:55:21,824 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:55:21,825 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:55:21,825 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-19 04:55:21,825 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:21,825 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:55:21,826 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:55:21,826 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_efcc2753-15e8-44dc-a18f-2a7df24e8688/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f002fb5adc832f6023a0c06b1c5ecdb23a860b09113c230254f6be0919311eb2 [2023-11-19 04:55:22,220 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:55:22,251 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:55:22,254 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:55:22,255 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:55:22,256 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:55:22,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i [2023-11-19 04:55:25,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:55:25,776 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:55:25,776 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/sv-benchmarks/c/ldv-memsafety/memleaks_test22_2-1.i [2023-11-19 04:55:25,797 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data/83fd070d9/08fc30c490e94cdebf4a855a422d1ee2/FLAGf6c2fe916 [2023-11-19 04:55:25,816 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/data/83fd070d9/08fc30c490e94cdebf4a855a422d1ee2 [2023-11-19 04:55:25,822 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:55:25,823 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:55:25,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:55:25,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:55:25,833 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:55:25,834 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:55:25" (1/1) ... [2023-11-19 04:55:25,835 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d212b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:25, skipping insertion in model container [2023-11-19 04:55:25,835 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:55:25" (1/1) ... [2023-11-19 04:55:25,905 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:55:26,440 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:55:26,466 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-19 04:55:26,500 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:55:26,587 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:55:26,610 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:55:26,684 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:55:26,734 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 04:55:26,743 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:55:26,743 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26 WrapperNode [2023-11-19 04:55:26,743 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:55:26,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:55:26,744 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:55:26,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:55:26,753 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,785 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,806 INFO L138 Inliner]: procedures = 165, calls = 68, calls flagged for inlining = 22, calls inlined = 8, statements flattened = 45 [2023-11-19 04:55:26,807 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:55:26,807 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:55:26,807 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:55:26,808 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:55:26,817 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,817 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,860 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,863 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,866 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,867 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,887 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:55:26,888 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:55:26,888 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:55:26,888 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:55:26,889 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (1/1) ... [2023-11-19 04:55:26,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:55:26,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:26,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:55:26,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:55:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-11-19 04:55:27,003 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-11-19 04:55:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-19 04:55:27,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-19 04:55:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:55:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:55:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:55:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-19 04:55:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 04:55:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:55:27,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:55:27,201 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:55:27,203 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:55:27,494 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:55:27,513 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:55:27,513 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-19 04:55:27,517 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:55:27 BoogieIcfgContainer [2023-11-19 04:55:27,517 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:55:27,520 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:55:27,520 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:55:27,523 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:55:27,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:55:25" (1/3) ... [2023-11-19 04:55:27,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef6e169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:55:27, skipping insertion in model container [2023-11-19 04:55:27,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:55:26" (2/3) ... [2023-11-19 04:55:27,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef6e169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:55:27, skipping insertion in model container [2023-11-19 04:55:27,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:55:27" (3/3) ... [2023-11-19 04:55:27,530 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_2-1.i [2023-11-19 04:55:27,552 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:55:27,553 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-11-19 04:55:27,613 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:55:27,620 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;@19e59f5f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:55:27,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-11-19 04:55:27,625 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:55:27,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:27,636 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:27,637 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:27,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:27,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1450204525, now seen corresponding path program 1 times [2023-11-19 04:55:27,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504908020] [2023-11-19 04:55:27,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:27,664 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 04:55:27,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:27,670 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:27,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:27,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:55:27,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:27,927 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 04:55:28,020 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 04:55:28,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:28,022 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:28,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504908020] [2023-11-19 04:55:28,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504908020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:28,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:28,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:28,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831979996] [2023-11-19 04:55:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:28,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:55:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:28,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:55:28,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-19 04:55:28,094 INFO L87 Difference]: Start difference. First operand has 39 states, 25 states have (on average 1.56) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:28,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:28,411 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2023-11-19 04:55:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:28,415 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-19 04:55:28,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:28,426 INFO L225 Difference]: With dead ends: 58 [2023-11-19 04:55:28,426 INFO L226 Difference]: Without dead ends: 56 [2023-11-19 04:55:28,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:55:28,433 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:28,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 106 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:55:28,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-19 04:55:28,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2023-11-19 04:55:28,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.5) internal successors, (42), 37 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2023-11-19 04:55:28,474 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 10 [2023-11-19 04:55:28,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:28,475 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2023-11-19 04:55:28,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2023-11-19 04:55:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:55:28,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:28,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:28,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:28,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:28,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:28,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:28,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1478833676, now seen corresponding path program 1 times [2023-11-19 04:55:28,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:28,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115316004] [2023-11-19 04:55:28,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:28,682 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 04:55:28,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:28,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:28,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:28,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:28,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:28,874 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 04:55:28,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:28,875 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:28,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115316004] [2023-11-19 04:55:28,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115316004] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:28,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:28,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:28,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380843135] [2023-11-19 04:55:28,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:28,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:55:28,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:28,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:55:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:28,879 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:28,926 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-11-19 04:55:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:55:28,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-19 04:55:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:28,929 INFO L225 Difference]: With dead ends: 41 [2023-11-19 04:55:28,930 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 04:55:28,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:28,937 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:28,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 154 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:55:28,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 04:55:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-19 04:55:28,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-11-19 04:55:28,946 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 10 [2023-11-19 04:55:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:28,946 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-11-19 04:55:28,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:28,947 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-11-19 04:55:28,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:55:28,948 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:28,948 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:28,956 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:29,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:29,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2006667364, now seen corresponding path program 1 times [2023-11-19 04:55:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [997037082] [2023-11-19 04:55:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:29,152 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 04:55:29,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:29,154 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:29,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 04:55:29,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:29,239 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 04:55:29,417 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 04:55:29,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:29,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:29,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [997037082] [2023-11-19 04:55:29,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [997037082] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:29,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:29,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 04:55:29,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246132553] [2023-11-19 04:55:29,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:29,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:55:29,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:29,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:55:29,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:55:29,428 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:29,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:29,742 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-11-19 04:55:29,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:29,743 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-19 04:55:29,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:29,744 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:55:29,744 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 04:55:29,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:55:29,746 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:29,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 110 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:55:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 04:55:29,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-11-19 04:55:29,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 34 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:29,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-19 04:55:29,752 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 11 [2023-11-19 04:55:29,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:29,753 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-19 04:55:29,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:29,753 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-19 04:55:29,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:55:29,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:29,754 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:29,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:29,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:29,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2077119379, now seen corresponding path program 1 times [2023-11-19 04:55:29,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:29,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257388632] [2023-11-19 04:55:29,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:29,961 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 04:55:29,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:29,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:29,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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)] Waiting until timeout for monitored process [2023-11-19 04:55:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:30,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:30,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:30,058 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 04:55:30,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:30,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:30,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257388632] [2023-11-19 04:55:30,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257388632] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:30,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:30,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:55:30,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051684208] [2023-11-19 04:55:30,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:30,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:55:30,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:30,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:55:30,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:30,063 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:30,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:30,098 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-11-19 04:55:30,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:55:30,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 04:55:30,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:30,101 INFO L225 Difference]: With dead ends: 40 [2023-11-19 04:55:30,101 INFO L226 Difference]: Without dead ends: 40 [2023-11-19 04:55:30,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:55:30,106 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:30,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 121 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:55:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-19 04:55:30,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2023-11-19 04:55:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-11-19 04:55:30,125 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 12 [2023-11-19 04:55:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:30,126 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-11-19 04:55:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-11-19 04:55:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 04:55:30,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:30,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:30,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:30,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:30,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:30,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:30,331 INFO L85 PathProgramCache]: Analyzing trace with hash -475037582, now seen corresponding path program 1 times [2023-11-19 04:55:30,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:30,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1866180821] [2023-11-19 04:55:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:30,332 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 04:55:30,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:30,333 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:30,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (6)] Waiting until timeout for monitored process [2023-11-19 04:55:30,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:30,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:30,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:30,427 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 04:55:30,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:30,427 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:30,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1866180821] [2023-11-19 04:55:30,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1866180821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:30,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:30,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 04:55:30,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814290007] [2023-11-19 04:55:30,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:30,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:55:30,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:30,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:55:30,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:55:30,430 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:30,535 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-11-19 04:55:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:55:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-19 04:55:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:30,537 INFO L225 Difference]: With dead ends: 42 [2023-11-19 04:55:30,537 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:55:30,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:55:30,538 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:30,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:55:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:55:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 04:55:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.375) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-11-19 04:55:30,543 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 12 [2023-11-19 04:55:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:30,543 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-11-19 04:55:30,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-11-19 04:55:30,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:55:30,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:30,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:30,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (6)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:30,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:30,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:30,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:30,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1119696155, now seen corresponding path program 1 times [2023-11-19 04:55:30,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:30,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [775950760] [2023-11-19 04:55:30,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:30,751 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 04:55:30,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:30,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:30,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:30,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:30,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:55:30,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:30,885 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 04:55:30,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:30,886 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:30,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [775950760] [2023-11-19 04:55:30,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [775950760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:30,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:30,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:55:30,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580007045] [2023-11-19 04:55:30,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:30,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:55:30,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:30,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:55:30,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:55:30,891 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:30,921 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2023-11-19 04:55:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:55:30,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-19 04:55:30,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:30,927 INFO L225 Difference]: With dead ends: 36 [2023-11-19 04:55:30,927 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 04:55:30,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:55:30,928 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 3 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:30,929 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 97 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:55:30,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 04:55:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 04:55:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.36) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-19 04:55:30,939 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 16 [2023-11-19 04:55:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:30,940 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-19 04:55:30,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-19 04:55:30,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:55:30,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:30,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:30,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:31,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:31,145 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:31,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:31,145 INFO L85 PathProgramCache]: Analyzing trace with hash 291583310, now seen corresponding path program 1 times [2023-11-19 04:55:31,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:31,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1010336204] [2023-11-19 04:55:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:31,146 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 04:55:31,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:31,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:31,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:31,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:31,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:31,269 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 04:55:31,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:31,329 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 04:55:31,329 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1010336204] [2023-11-19 04:55:31,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1010336204] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [485578173] [2023-11-19 04:55:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:31,331 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:31,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:31,334 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:31,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-11-19 04:55:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:31,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:31,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:31,494 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 04:55:31,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:31,516 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 04:55:31,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [485578173] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:31,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966021711] [2023-11-19 04:55:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:31,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:31,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:31,530 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:31,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 04:55:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:31,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 04:55:31,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:31,625 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 04:55:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:55:31,808 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:31,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966021711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:31,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-19 04:55:31,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5, 5] total 14 [2023-11-19 04:55:31,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353417452] [2023-11-19 04:55:31,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:31,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:55:31,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:55:31,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-19 04:55:31,824 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:32,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:32,098 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-11-19 04:55:32,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 04:55:32,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 04:55:32,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:32,099 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:55:32,100 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:55:32,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-19 04:55:32,101 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:32,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 90 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:55:32,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:55:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 04:55:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.32) internal successors, (33), 31 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-11-19 04:55:32,105 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 17 [2023-11-19 04:55:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:32,106 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-11-19 04:55:32,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-11-19 04:55:32,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:55:32,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:32,108 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:32,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:32,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:32,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:32,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:32,709 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:32,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:32,710 INFO L85 PathProgramCache]: Analyzing trace with hash 291583311, now seen corresponding path program 1 times [2023-11-19 04:55:32,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:32,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [842708454] [2023-11-19 04:55:32,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:32,710 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 04:55:32,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:32,713 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:32,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:32,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:32,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:32,844 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 04:55:32,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:32,897 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 04:55:32,897 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:32,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [842708454] [2023-11-19 04:55:32,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [842708454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:32,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1488025623] [2023-11-19 04:55:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:32,898 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:32,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:32,903 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:32,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-11-19 04:55:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:33,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:33,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:33,066 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 04:55:33,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:33,089 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 04:55:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1488025623] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105613480] [2023-11-19 04:55:33,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:33,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:33,091 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:33,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 04:55:33,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:33,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:55:33,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:33,192 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 04:55:33,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:33,214 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 04:55:33,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105613480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:33,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 04:55:33,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-11-19 04:55:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973418] [2023-11-19 04:55:33,216 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 04:55:33,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 04:55:33,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 04:55:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 04:55:33,218 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:33,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:33,297 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-11-19 04:55:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:33,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-19 04:55:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:33,298 INFO L225 Difference]: With dead ends: 38 [2023-11-19 04:55:33,298 INFO L226 Difference]: Without dead ends: 38 [2023-11-19 04:55:33,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-19 04:55:33,299 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:33,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 217 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:55:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-19 04:55:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-19 04:55:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:33,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-19 04:55:33,304 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 17 [2023-11-19 04:55:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:33,305 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-19 04:55:33,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:33,305 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-19 04:55:33,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-19 04:55:33,306 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:33,306 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:33,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:33,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:33,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:33,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:33,927 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:33,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -875222564, now seen corresponding path program 2 times [2023-11-19 04:55:33,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:33,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755355042] [2023-11-19 04:55:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 04:55:33,928 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 04:55:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:33,929 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:33,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (14)] Waiting until timeout for monitored process [2023-11-19 04:55:34,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-19 04:55:34,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:55:34,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-19 04:55:34,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:34,041 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 04:55:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:55:34,285 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:34,285 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:34,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755355042] [2023-11-19 04:55:34,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755355042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:34,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:55:34,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 04:55:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430384765] [2023-11-19 04:55:34,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:34,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:55:34,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:34,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:55:34,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-19 04:55:34,289 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:34,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:34,632 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-11-19 04:55:34,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:55:34,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-19 04:55:34,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:34,634 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:55:34,634 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 04:55:34,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-19 04:55:34,635 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:34,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 122 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:55:34,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 04:55:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-19 04:55:34,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.25) internal successors, (35), 33 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-11-19 04:55:34,638 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 20 [2023-11-19 04:55:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:34,639 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-11-19 04:55:34,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-11-19 04:55:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 04:55:34,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:34,640 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:34,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (14)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:34,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:34,840 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:34,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:34,841 INFO L85 PathProgramCache]: Analyzing trace with hash 723197947, now seen corresponding path program 1 times [2023-11-19 04:55:34,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:34,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206573693] [2023-11-19 04:55:34,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:34,841 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 04:55:34,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:34,842 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:34,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (15)] Waiting until timeout for monitored process [2023-11-19 04:55:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:34,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:34,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:35,028 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 04:55:35,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:35,231 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 04:55:35,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206573693] [2023-11-19 04:55:35,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206573693] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:35,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [714018397] [2023-11-19 04:55:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:35,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:35,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:35,233 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:35,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-11-19 04:55:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:35,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:55:35,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:55:35,468 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:35,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [714018397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:35,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:55:35,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 18 [2023-11-19 04:55:35,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218548952] [2023-11-19 04:55:35,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:35,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 04:55:35,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:35,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 04:55:35,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-19 04:55:35,470 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:35,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:35,516 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-11-19 04:55:35,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 04:55:35,517 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-19 04:55:35,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:35,517 INFO L225 Difference]: With dead ends: 37 [2023-11-19 04:55:35,517 INFO L226 Difference]: Without dead ends: 37 [2023-11-19 04:55:35,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:55:35,518 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:35,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:55:35,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-19 04:55:35,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-19 04:55:35,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 33 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:35,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-11-19 04:55:35,523 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 22 [2023-11-19 04:55:35,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:35,523 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-11-19 04:55:35,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:35,523 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-11-19 04:55:35,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:55:35,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:35,524 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:35,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:35,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (15)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:35,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:35,936 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:35,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:35,936 INFO L85 PathProgramCache]: Analyzing trace with hash 657245973, now seen corresponding path program 1 times [2023-11-19 04:55:35,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:35,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2086321787] [2023-11-19 04:55:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:35,937 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 04:55:35,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:35,938 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:35,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (17)] Waiting until timeout for monitored process [2023-11-19 04:55:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:36,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:36,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:36,142 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 04:55:36,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:36,323 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 04:55:36,323 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2086321787] [2023-11-19 04:55:36,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2086321787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:36,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [659221862] [2023-11-19 04:55:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:36,323 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:36,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:36,327 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:36,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-11-19 04:55:36,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:36,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:36,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:36,578 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 04:55:36,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:36,607 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 04:55:36,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [659221862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:36,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017055919] [2023-11-19 04:55:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:36,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:36,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:36,609 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:36,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 04:55:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:36,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-19 04:55:36,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:36,731 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 04:55:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:55:36,923 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:36,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017055919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:36,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-19 04:55:36,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8] total 21 [2023-11-19 04:55:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344873180] [2023-11-19 04:55:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:36,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 04:55:36,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:36,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 04:55:36,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:55:36,925 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:37,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:37,222 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2023-11-19 04:55:37,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 04:55:37,222 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-19 04:55:37,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:37,223 INFO L225 Difference]: With dead ends: 35 [2023-11-19 04:55:37,223 INFO L226 Difference]: Without dead ends: 35 [2023-11-19 04:55:37,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-11-19 04:55:37,224 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:37,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 73 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:55:37,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-19 04:55:37,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-19 04:55:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:37,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2023-11-19 04:55:37,228 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 24 [2023-11-19 04:55:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2023-11-19 04:55:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2023-11-19 04:55:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:55:37,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:37,229 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:37,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (17)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:37,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:37,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:37,830 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:37,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 657245974, now seen corresponding path program 1 times [2023-11-19 04:55:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:37,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [327627477] [2023-11-19 04:55:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:37,831 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 04:55:37,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:37,832 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:37,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (20)] Waiting until timeout for monitored process [2023-11-19 04:55:37,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:37,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:37,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:38,061 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 04:55:38,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:38,234 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 04:55:38,235 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [327627477] [2023-11-19 04:55:38,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [327627477] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:38,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [879925251] [2023-11-19 04:55:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:38,235 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:38,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:38,236 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:38,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-11-19 04:55:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:38,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:38,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:38,497 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 04:55:38,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:38,522 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 04:55:38,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [879925251] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:38,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085851834] [2023-11-19 04:55:38,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:38,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:38,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:38,524 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:38,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 04:55:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:38,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 04:55:38,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:38,674 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 04:55:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:55:39,025 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:39,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085851834] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:39,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-19 04:55:39,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 8, 8] total 22 [2023-11-19 04:55:39,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871644768] [2023-11-19 04:55:39,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:39,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 04:55:39,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:39,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 04:55:39,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-19 04:55:39,028 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:39,441 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-11-19 04:55:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 04:55:39,442 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-19 04:55:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:39,443 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:55:39,443 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 04:55:39,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-19 04:55:39,444 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:39,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 100 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 04:55:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 04:55:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-19 04:55:39,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:39,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-19 04:55:39,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2023-11-19 04:55:39,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:39,449 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-19 04:55:39,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:39,450 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-19 04:55:39,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:55:39,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:39,451 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:39,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:39,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (20)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:39,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:40,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:40,059 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:40,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:40,059 INFO L85 PathProgramCache]: Analyzing trace with hash 606614567, now seen corresponding path program 1 times [2023-11-19 04:55:40,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:40,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1657748083] [2023-11-19 04:55:40,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:40,060 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-19 04:55:40,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:40,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:40,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (23)] Waiting until timeout for monitored process [2023-11-19 04:55:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:40,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:40,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:40,263 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 04:55:40,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:40,449 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 04:55:40,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:40,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1657748083] [2023-11-19 04:55:40,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1657748083] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:40,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [637737099] [2023-11-19 04:55:40,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:40,450 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:40,451 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:40,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-11-19 04:55:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:40,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:55:40,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:40,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 04:55:40,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 04:55:40,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [637737099] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:55:40,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-19 04:55:40,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-11-19 04:55:40,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114835289] [2023-11-19 04:55:40,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:55:40,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 04:55:40,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:40,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 04:55:40,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:55:40,721 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:40,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:40,795 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-11-19 04:55:40,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 04:55:40,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-19 04:55:40,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:40,796 INFO L225 Difference]: With dead ends: 33 [2023-11-19 04:55:40,796 INFO L226 Difference]: Without dead ends: 33 [2023-11-19 04:55:40,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-19 04:55:40,797 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:40,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 115 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:55:40,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-19 04:55:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-19 04:55:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2023-11-19 04:55:40,800 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 24 [2023-11-19 04:55:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:40,800 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2023-11-19 04:55:40,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:55:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2023-11-19 04:55:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:55:40,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:40,802 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:40,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:41,008 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (23)] Ended with exit code 0 [2023-11-19 04:55:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:41,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:41,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:41,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1939813476, now seen corresponding path program 1 times [2023-11-19 04:55:41,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:41,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [721690528] [2023-11-19 04:55:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:41,208 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 04:55:41,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:41,209 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:41,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (25)] Waiting until timeout for monitored process [2023-11-19 04:55:41,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:41,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:41,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:41,431 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 04:55:41,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:41,650 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 04:55:41,650 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:41,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [721690528] [2023-11-19 04:55:41,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [721690528] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:41,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517911468] [2023-11-19 04:55:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:41,651 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:41,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:41,652 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:41,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-11-19 04:55:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:41,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:55:41,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:41,927 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 04:55:41,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:41,961 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 04:55:41,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [517911468] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:41,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000277454] [2023-11-19 04:55:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:55:41,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:41,963 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:41,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-19 04:55:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:55:42,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 04:55:42,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:42,166 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 04:55:42,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:42,520 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 04:55:42,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000277454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:42,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 04:55:42,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2023-11-19 04:55:42,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703203917] [2023-11-19 04:55:42,521 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 04:55:42,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 04:55:42,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 04:55:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2023-11-19 04:55:42,523 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:42,897 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2023-11-19 04:55:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 04:55:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-11-19 04:55:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:42,902 INFO L225 Difference]: With dead ends: 39 [2023-11-19 04:55:42,902 INFO L226 Difference]: Without dead ends: 39 [2023-11-19 04:55:42,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2023-11-19 04:55:42,903 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 24 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:42,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 217 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:55:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-19 04:55:42,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-19 04:55:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2023-11-19 04:55:42,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 32 [2023-11-19 04:55:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:42,907 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2023-11-19 04:55:42,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 19 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:42,907 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2023-11-19 04:55:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 04:55:42,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:42,908 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:42,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (25)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:43,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:43,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:43,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:43,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash 961724292, now seen corresponding path program 2 times [2023-11-19 04:55:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:43,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1226416910] [2023-11-19 04:55:43,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 04:55:43,511 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 04:55:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:43,512 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:43,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (28)] Waiting until timeout for monitored process [2023-11-19 04:55:43,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 04:55:43,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:55:43,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:55:43,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:55:43,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:44,999 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:55:45,000 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-19 04:55:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1226416910] [2023-11-19 04:55:45,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1226416910] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:45,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1512633485] [2023-11-19 04:55:45,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 04:55:45,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-19 04:55:45,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 [2023-11-19 04:55:45,004 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-19 04:55:45,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-11-19 04:55:45,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 04:55:45,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:55:45,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-19 04:55:45,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:55:45,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:55:45,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1512633485] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:45,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512870828] [2023-11-19 04:55:45,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 04:55:45,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:45,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:55:45,914 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:55:45,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-19 04:55:46,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 04:55:46,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 04:55:46,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 04:55:46,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:55:46,476 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:55:46,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:55:47,273 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:55:47,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512870828] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:55:47,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-19 04:55:47,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 35 [2023-11-19 04:55:47,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22249742] [2023-11-19 04:55:47,274 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-19 04:55:47,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-19 04:55:47,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-19 04:55:47,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-19 04:55:47,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=881, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 04:55:47,276 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:48,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:55:48,747 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-11-19 04:55:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 04:55:48,751 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-11-19 04:55:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:55:48,752 INFO L225 Difference]: With dead ends: 51 [2023-11-19 04:55:48,752 INFO L226 Difference]: Without dead ends: 51 [2023-11-19 04:55:48,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=615, Invalid=1547, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 04:55:48,754 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 37 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 04:55:48,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 434 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 04:55:48,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-19 04:55:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-11-19 04:55:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 04:55:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2023-11-19 04:55:48,763 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 38 [2023-11-19 04:55:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:55:48,764 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2023-11-19 04:55:48,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 04:55:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2023-11-19 04:55:48,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-19 04:55:48,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:55:48,772 INFO L195 NwaCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:48,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (28)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:48,980 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2023-11-19 04:55:49,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-19 04:55:49,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:55:49,378 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-11-19 04:55:49,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:55:49,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1270444708, now seen corresponding path program 3 times [2023-11-19 04:55:49,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-19 04:55:49,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1214382361] [2023-11-19 04:55:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 04:55:49,380 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 04:55:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/mathsat [2023-11-19 04:55:49,381 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:49,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (31)] Waiting until timeout for monitored process [2023-11-19 04:55:49,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-19 04:55:49,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-11-19 04:55:49,829 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 04:55:50,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 04:55:50,060 INFO L130 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2023-11-19 04:55:50,061 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 04:55:50,062 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (8 of 9 remaining) [2023-11-19 04:55:50,063 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-11-19 04:55:50,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-11-19 04:55:50,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-11-19 04:55:50,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-11-19 04:55:50,064 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 9 remaining) [2023-11-19 04:55:50,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 9 remaining) [2023-11-19 04:55:50,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 9 remaining) [2023-11-19 04:55:50,065 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location LDV_INIT_LIST_HEADErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 9 remaining) [2023-11-19 04:55:50,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 (31)] Forceful destruction successful, exit code 0 [2023-11-19 04:55:50,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/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 04:55:50,269 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:55:50,271 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-19 04:55:50,308 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~ret38 [2023-11-19 04:55:50,310 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_memset_#res#1 [2023-11-19 04:55:50,311 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_memset_#res#1 [2023-11-19 04:55:50,311 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #Ultimate.C_memset_#res#1 [2023-11-19 04:55:50,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:55:50 BoogieIcfgContainer [2023-11-19 04:55:50,319 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-19 04:55:50,320 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-19 04:55:50,320 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-19 04:55:50,321 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-19 04:55:50,321 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:55:27" (3/4) ... [2023-11-19 04:55:50,323 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-19 04:55:50,325 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-19 04:55:50,325 INFO L158 Benchmark]: Toolchain (without parser) took 24502.40ms. Allocated memory was 77.6MB in the beginning and 159.4MB in the end (delta: 81.8MB). Free memory was 52.2MB in the beginning and 99.2MB in the end (delta: -47.0MB). Peak memory consumption was 35.1MB. Max. memory is 16.1GB. [2023-11-19 04:55:50,326 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 77.6MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:55:50,326 INFO L158 Benchmark]: CACSL2BoogieTranslator took 917.05ms. Allocated memory is still 77.6MB. Free memory was 52.0MB in the beginning and 44.0MB in the end (delta: 8.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-19 04:55:50,327 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.39ms. Allocated memory is still 77.6MB. Free memory was 44.0MB in the beginning and 41.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:55:50,327 INFO L158 Benchmark]: Boogie Preprocessor took 79.87ms. Allocated memory is still 77.6MB. Free memory was 41.6MB in the beginning and 39.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-19 04:55:50,328 INFO L158 Benchmark]: RCFGBuilder took 629.34ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 39.7MB in the beginning and 74.1MB in the end (delta: -34.4MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. [2023-11-19 04:55:50,328 INFO L158 Benchmark]: TraceAbstraction took 22799.78ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 99.2MB in the end (delta: -26.1MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2023-11-19 04:55:50,329 INFO L158 Benchmark]: Witness Printer took 4.86ms. Allocated memory is still 159.4MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-19 04:55:50,331 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 77.6MB. Free memory is still 53.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 917.05ms. Allocated memory is still 77.6MB. Free memory was 52.0MB in the beginning and 44.0MB in the end (delta: 8.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.39ms. Allocated memory is still 77.6MB. Free memory was 44.0MB in the beginning and 41.6MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 79.87ms. Allocated memory is still 77.6MB. Free memory was 41.6MB in the beginning and 39.7MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 629.34ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 39.7MB in the beginning and 74.1MB in the end (delta: -34.4MB). Peak memory consumption was 8.5MB. Max. memory is 16.1GB. * TraceAbstraction took 22799.78ms. Allocated memory was 109.1MB in the beginning and 159.4MB in the end (delta: 50.3MB). Free memory was 73.1MB in the beginning and 99.2MB in the end (delta: -26.1MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. * Witness Printer took 4.86ms. Allocated memory is still 159.4MB. Free memory is still 99.2MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~ret38 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_memset_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_memset_#res#1 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #Ultimate.C_memset_#res#1 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 761]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 761. Possible FailurePath: [L569] struct ldv_list_head ldv_global_msg_list = { &(ldv_global_msg_list), &(ldv_global_msg_list) }; VAL [ldv_global_msg_list={1:0}] [L762] CALL entry_point() [L758] struct ldv_kobject *kobj; [L759] CALL, EXPR ldv_kobject_create() [L740] struct ldv_kobject *kobj; VAL [ldv_global_msg_list={1:0}] [L741] CALL, EXPR ldv_malloc(sizeof(*kobj)) VAL [\old(size)=16, ldv_global_msg_list={1:0}] [L526] COND TRUE __VERIFIER_nondet_int() [L527] return malloc(size); [L741] RET, EXPR ldv_malloc(sizeof(*kobj)) VAL [ldv_global_msg_list={1:0}] [L741] kobj = ldv_malloc(sizeof(*kobj)) [L742] COND FALSE !(!kobj) [L744] FCALL memset(kobj, 0, sizeof(*kobj)) [L745] CALL ldv_kobject_init(kobj) [L730] COND FALSE !(!kobj) [L733] CALL ldv_kobject_init_internal(kobj) [L723] COND FALSE !(!kobj) [L725] CALL ldv_kref_init(&kobj->kref) [L682] ((&kref->refcount)->counter) = (1) VAL [kref={2:12}, kref={2:12}, ldv_global_msg_list={1:0}] [L725] RET ldv_kref_init(&kobj->kref) [L726] CALL LDV_INIT_LIST_HEAD(&kobj->entry) VAL [ldv_global_msg_list={1:0}, list={2:4}] [L540] list->next = list VAL [ldv_global_msg_list={1:0}, list={2:4}, list={2:4}] [L541] list->prev = list VAL [ldv_global_msg_list={1:0}, list={2:4}, list={2:4}] [L726] RET LDV_INIT_LIST_HEAD(&kobj->entry) VAL [kobj={2:0}, kobj={2:0}, ldv_global_msg_list={1:0}] [L733] RET ldv_kobject_init_internal(kobj) [L745] RET ldv_kobject_init(kobj) [L746] return kobj; VAL [\result={2:0}, kobj={2:0}, ldv_global_msg_list={1:0}] [L759] RET, EXPR ldv_kobject_create() [L759] kobj = ldv_kobject_create() [L762] RET entry_point() - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 39 locations, 9 error locations. Started 1 CEGAR loops. OverallTime: 22.7s, OverallIterations: 16, TraceHistogramMax: 16, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 274 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 271 mSDsluCounter, 2149 SdHoareTripleChecker+Invalid, 1.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1732 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1077 IncrementalHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 417 mSDtfsCounter, 1077 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1070 GetRequests, 864 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1142 ImplicationChecksByTransitivity, 5.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=15, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 15 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 2.0s SatisfiabilityAnalysisTime, 7.0s InterpolantComputationTime, 683 NumberOfCodeBlocks, 679 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1030 ConstructedInterpolants, 0 QuantifiedInterpolants, 3069 SizeOfPredicates, 46 NumberOfNonLiveVariables, 3273 ConjunctsInSsa, 252 ConjunctsInUnsatCore, 46 InterpolantComputations, 12 PerfectInterpolantSequences, 51/571 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-19 04:55:50,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_efcc2753-15e8-44dc-a18f-2a7df24e8688/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample