./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh --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 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:50:43,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:50:43,913 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 19:50:43,918 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:50:43,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:50:43,946 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:50:43,946 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:50:43,947 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:50:43,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:50:43,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:50:43,949 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:50:43,949 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:50:43,950 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:50:43,950 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:50:43,951 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:50:43,951 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:50:43,952 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:50:43,952 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:50:43,953 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:50:43,953 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:50:43,954 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:50:43,955 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:50:43,956 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 19:50:43,956 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 19:50:43,957 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:50:43,957 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:50:43,958 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:50:43,958 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:50:43,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:50:43,959 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 19:50:43,960 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 19:50:43,960 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 19:50:43,960 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:50:43,961 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:50:43,961 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:50:43,961 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:50:43,961 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:50:43,962 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:50:43,962 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:50:43,962 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:50:43,962 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:50:43,963 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:50:43,963 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:50:43,963 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:50:43,963 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:50:43,963 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:50:43,963 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:50:43,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:50:43,964 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_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2023-12-02 19:50:44,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:50:44,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:50:44,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:50:44,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:50:44,225 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:50:44,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2023-12-02 19:50:47,097 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:50:47,337 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:50:47,337 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2023-12-02 19:50:47,353 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data/44f20e576/8bb6425a791e48c78e9234bab19894f2/FLAGd6a0d4394 [2023-12-02 19:50:47,370 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data/44f20e576/8bb6425a791e48c78e9234bab19894f2 [2023-12-02 19:50:47,373 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:50:47,375 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:50:47,376 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:50:47,377 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:50:47,383 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:50:47,384 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:50:47" (1/1) ... [2023-12-02 19:50:47,385 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c440464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:47, skipping insertion in model container [2023-12-02 19:50:47,385 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:50:47" (1/1) ... [2023-12-02 19:50:47,444 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:50:47,749 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:50:47,763 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) [2023-12-02 19:50:47,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a62ca96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:47, skipping insertion in model container [2023-12-02 19:50:47,764 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:50:47,765 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 19:50:47,767 INFO L158 Benchmark]: Toolchain (without parser) took 391.08ms. Allocated memory is still 132.1MB. Free memory was 90.8MB in the beginning and 79.2MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 19:50:47,768 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 132.1MB. Free memory is still 101.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 19:50:47,769 INFO L158 Benchmark]: CACSL2BoogieTranslator took 388.17ms. Allocated memory is still 132.1MB. Free memory was 90.8MB in the beginning and 79.2MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 19:50:47,771 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 132.1MB. Free memory is still 101.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 388.17ms. Allocated memory is still 132.1MB. Free memory was 90.8MB in the beginning and 79.2MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 534]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh --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 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:50:49,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:50:49,651 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 19:50:49,658 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:50:49,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:50:49,693 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:50:49,694 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:50:49,695 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:50:49,695 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:50:49,696 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:50:49,697 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:50:49,698 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:50:49,698 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:50:49,699 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:50:49,700 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:50:49,700 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:50:49,701 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 19:50:49,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 19:50:49,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:50:49,703 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:50:49,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:50:49,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:50:49,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:50:49,705 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 19:50:49,706 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 19:50:49,706 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 19:50:49,707 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:50:49,707 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 19:50:49,708 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 19:50:49,708 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 19:50:49,709 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:50:49,709 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:50:49,709 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:50:49,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:50:49,710 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 19:50:49,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:50:49,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:50:49,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:50:49,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:50:49,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:50:49,712 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 19:50:49,712 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 19:50:49,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:50:49,712 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:50:49,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:50:49,713 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_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1c36df5364345a00481880384557a6da7ee9f3df41e2ea49d72bfaffe4fac7a5 [2023-12-02 19:50:50,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:50:50,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:50:50,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:50:50,051 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:50:50,051 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:50:50,052 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2023-12-02 19:50:52,880 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:50:53,131 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:50:53,131 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/sv-benchmarks/c/array-memsafety/selectionsort-alloca-1.i [2023-12-02 19:50:53,151 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data/cd786dca7/2e114dd56095484a861beb02c514aa15/FLAGc864d5a62 [2023-12-02 19:50:53,168 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/data/cd786dca7/2e114dd56095484a861beb02c514aa15 [2023-12-02 19:50:53,172 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:50:53,174 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:50:53,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:50:53,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:50:53,180 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:50:53,181 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,182 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7995b866 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53, skipping insertion in model container [2023-12-02 19:50:53,183 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,234 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:50:53,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:50:53,532 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 19:50:53,549 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:50:53,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:50:53,590 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:50:53,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:50:53,659 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:50:53,660 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53 WrapperNode [2023-12-02 19:50:53,660 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:50:53,661 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:50:53,661 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:50:53,661 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:50:53,668 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,687 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,711 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-12-02 19:50:53,712 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:50:53,713 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:50:53,713 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:50:53,713 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:50:53,722 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,739 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,739 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,749 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,753 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,755 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,757 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,761 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:50:53,762 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:50:53,762 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:50:53,763 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:50:53,764 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (1/1) ... [2023-12-02 19:50:53,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:50:53,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:50:53,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:50:53,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:50:53,854 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 19:50:53,855 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 19:50:53,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 19:50:53,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 19:50:53,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:50:53,855 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:50:53,989 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:50:53,991 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:50:54,293 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:50:54,332 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:50:54,332 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-02 19:50:54,332 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:50:54 BoogieIcfgContainer [2023-12-02 19:50:54,333 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:50:54,335 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:50:54,335 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:50:54,338 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:50:54,338 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:50:53" (1/3) ... [2023-12-02 19:50:54,339 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174aeab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:50:54, skipping insertion in model container [2023-12-02 19:50:54,339 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:50:53" (2/3) ... [2023-12-02 19:50:54,340 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@174aeab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:50:54, skipping insertion in model container [2023-12-02 19:50:54,340 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:50:54" (3/3) ... [2023-12-02 19:50:54,341 INFO L112 eAbstractionObserver]: Analyzing ICFG selectionsort-alloca-1.i [2023-12-02 19:50:54,360 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:50:54,361 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-12-02 19:50:54,402 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:50:54,408 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;@23a68a4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:50:54,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-12-02 19:50:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:54,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:50:54,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:50:54,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:50:54,419 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:50:54,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:50:54,424 INFO L85 PathProgramCache]: Analyzing trace with hash 108210107, now seen corresponding path program 1 times [2023-12-02 19:50:54,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:50:54,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [176148236] [2023-12-02 19:50:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:54,437 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 [2023-12-02 19:50:54,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:50:54,438 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:50:54,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:54,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:54,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:50:54,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:54,599 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 [2023-12-02 19:50:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:54,618 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:50:54,619 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:50:54,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [176148236] [2023-12-02 19:50:54,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [176148236] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:50:54,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:50:54,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:50:54,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511742225] [2023-12-02 19:50:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:50:54,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:50:54,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:50:54,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:50:54,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:50:54,660 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:54,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:50:54,762 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-12-02 19:50:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:50:54,765 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 19:50:54,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:50:54,772 INFO L225 Difference]: With dead ends: 33 [2023-12-02 19:50:54,772 INFO L226 Difference]: Without dead ends: 32 [2023-12-02 19:50:54,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:50:54,777 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:50:54,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:50:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-02 19:50:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-12-02 19:50:54,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 2.0) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:54,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-12-02 19:50:54,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 5 [2023-12-02 19:50:54,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:50:54,807 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-12-02 19:50:54,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:54,808 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-12-02 19:50:54,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:50:54,808 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:50:54,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:50:54,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:55,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:50:55,009 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:50:55,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:50:55,010 INFO L85 PathProgramCache]: Analyzing trace with hash 108210108, now seen corresponding path program 1 times [2023-12-02 19:50:55,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:50:55,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714106458] [2023-12-02 19:50:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:55,011 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 [2023-12-02 19:50:55,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:50:55,013 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:50:55,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:55,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:50:55,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:55,140 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 [2023-12-02 19:50:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:55,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:50:55,181 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:50:55,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714106458] [2023-12-02 19:50:55,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714106458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:50:55,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:50:55,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:50:55,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223729369] [2023-12-02 19:50:55,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:50:55,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:50:55,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:50:55,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:50:55,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:50:55,185 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:55,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:50:55,500 INFO L93 Difference]: Finished difference Result 64 states and 71 transitions. [2023-12-02 19:50:55,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:50:55,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 19:50:55,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:50:55,503 INFO L225 Difference]: With dead ends: 64 [2023-12-02 19:50:55,503 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 19:50:55,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:50:55,505 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 35 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:50:55,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 106 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:50:55,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 19:50:55,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 35. [2023-12-02 19:50:55,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:55,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-12-02 19:50:55,514 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 5 [2023-12-02 19:50:55,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:50:55,514 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-12-02 19:50:55,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:55,514 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-12-02 19:50:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:50:55,515 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:50:55,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:50:55,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:55,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:50:55,716 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:50:55,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:50:55,717 INFO L85 PathProgramCache]: Analyzing trace with hash 108269690, now seen corresponding path program 1 times [2023-12-02 19:50:55,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:50:55,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958174354] [2023-12-02 19:50:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:55,718 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 [2023-12-02 19:50:55,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:50:55,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:50:55,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:55,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:50:55,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:55,794 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 8 treesize of output 7 [2023-12-02 19:50:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:55,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:50:55,889 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:50:55,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958174354] [2023-12-02 19:50:55,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958174354] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:50:55,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:50:55,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:50:55,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126565858] [2023-12-02 19:50:55,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:50:55,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:50:55,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:50:55,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:50:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:50:55,893 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:50:56,114 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2023-12-02 19:50:56,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:50:56,116 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 19:50:56,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:50:56,117 INFO L225 Difference]: With dead ends: 37 [2023-12-02 19:50:56,117 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 19:50:56,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:50:56,118 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:50:56,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:50:56,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 19:50:56,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2023-12-02 19:50:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.9) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-12-02 19:50:56,124 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 5 [2023-12-02 19:50:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:50:56,125 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-12-02 19:50:56,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:56,125 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-12-02 19:50:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:50:56,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:50:56,126 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 19:50:56,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 19:50:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:50:56,328 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:50:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:50:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash 910768423, now seen corresponding path program 1 times [2023-12-02 19:50:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:50:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163179402] [2023-12-02 19:50:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:56,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:50:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:50:56,330 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:50:56,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:56,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:56,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:50:56,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:56,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:56,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:56,486 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:50:56,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163179402] [2023-12-02 19:50:56,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1163179402] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:56,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2037478930] [2023-12-02 19:50:56,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:56,487 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:50:56,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:50:56,495 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:50:56,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-12-02 19:50:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:56,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:50:56,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:56,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:56,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:56,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2037478930] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:56,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709408391] [2023-12-02 19:50:56,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:56,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:50:56,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:50:56,636 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:50:56,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:50:56,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:56,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:50:56,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:56,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:56,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:56,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709408391] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:56,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:50:56,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-12-02 19:50:56,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665033956] [2023-12-02 19:50:56,745 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:50:56,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:50:56,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:50:56,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:50:56,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:50:56,747 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:50:56,885 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-12-02 19:50:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:50:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:50:56,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:50:56,887 INFO L225 Difference]: With dead ends: 64 [2023-12-02 19:50:56,887 INFO L226 Difference]: Without dead ends: 64 [2023-12-02 19:50:56,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-12-02 19:50:56,889 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:50:56,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 143 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:50:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-02 19:50:56,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 38. [2023-12-02 19:50:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.75) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-12-02 19:50:56,894 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 7 [2023-12-02 19:50:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:50:56,895 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-12-02 19:50:56,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-12-02 19:50:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:50:56,895 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:50:56,895 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-12-02 19:50:56,898 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2023-12-02 19:50:57,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:50:57,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:50:57,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:50:57,498 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:50:57,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:50:57,499 INFO L85 PathProgramCache]: Analyzing trace with hash 968026725, now seen corresponding path program 1 times [2023-12-02 19:50:57,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:50:57,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560518474] [2023-12-02 19:50:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:57,499 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 [2023-12-02 19:50:57,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:50:57,500 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:50:57,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:50:57,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:57,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:50:57,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:57,561 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 8 treesize of output 7 [2023-12-02 19:50:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:57,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:58,124 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:50:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560518474] [2023-12-02 19:50:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560518474] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1545694462] [2023-12-02 19:50:58,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:58,125 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:50:58,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:50:58,126 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:50:58,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-12-02 19:50:58,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:58,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 19:50:58,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:58,268 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 8 treesize of output 7 [2023-12-02 19:50:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:58,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:58,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:58,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1545694462] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:58,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50663428] [2023-12-02 19:50:58,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:50:58,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:50:58,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:50:58,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:50:58,559 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:50:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:50:58,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 19:50:58,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:50:58,661 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 8 treesize of output 7 [2023-12-02 19:50:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:58,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:50:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:50:58,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50663428] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:50:58,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:50:58,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 12 [2023-12-02 19:50:58,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384154778] [2023-12-02 19:50:58,867 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:50:58,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 19:50:58,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:50:58,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 19:50:58,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:50:58,869 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:50:59,857 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2023-12-02 19:50:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 19:50:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:50:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:50:59,860 INFO L225 Difference]: With dead ends: 46 [2023-12-02 19:50:59,860 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 19:50:59,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2023-12-02 19:50:59,861 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:50:59,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 68 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:50:59,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 19:50:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2023-12-02 19:50:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.7) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:59,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-12-02 19:50:59,866 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2023-12-02 19:50:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:50:59,866 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-12-02 19:50:59,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:50:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-12-02 19:50:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:50:59,867 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:50:59,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:50:59,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:51:00,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:51:00,269 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-12-02 19:51:00,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:00,468 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:00,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1392076842, now seen corresponding path program 1 times [2023-12-02 19:51:00,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:00,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897360021] [2023-12-02 19:51:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:00,469 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 [2023-12-02 19:51:00,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:00,470 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:00,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:00,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:51:00,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:00,577 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc9#1.base_20| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_20| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_20|)))) is different from true [2023-12-02 19:51:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:00,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:51:00,578 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:00,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897360021] [2023-12-02 19:51:00,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897360021] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:51:00,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:51:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:51:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982057065] [2023-12-02 19:51:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:51:00,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:51:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:51:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-12-02 19:51:00,581 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:00,686 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-12-02 19:51:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:51:00,688 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:51:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:00,689 INFO L225 Difference]: With dead ends: 43 [2023-12-02 19:51:00,689 INFO L226 Difference]: Without dead ends: 41 [2023-12-02 19:51:00,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-12-02 19:51:00,690 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 26 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:00,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 38 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2023-12-02 19:51:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-12-02 19:51:00,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-12-02 19:51:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2023-12-02 19:51:00,697 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 10 [2023-12-02 19:51:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:00,697 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2023-12-02 19:51:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2023-12-02 19:51:00,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:51:00,698 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:00,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:00,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:51:00,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:00,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:00,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1392077223, now seen corresponding path program 1 times [2023-12-02 19:51:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:00,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1674195587] [2023-12-02 19:51:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:00,901 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 [2023-12-02 19:51:00,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:00,902 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-12-02 19:51:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:00,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:51:00,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:00,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:51:00,999 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:00,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1674195587] [2023-12-02 19:51:01,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1674195587] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:51:01,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:51:01,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:51:01,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467603716] [2023-12-02 19:51:01,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:51:01,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:51:01,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:51:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:51:01,002 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:01,102 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-12-02 19:51:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:51:01,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:51:01,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:01,103 INFO L225 Difference]: With dead ends: 43 [2023-12-02 19:51:01,103 INFO L226 Difference]: Without dead ends: 37 [2023-12-02 19:51:01,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:51:01,104 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:01,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 65 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:51:01,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-02 19:51:01,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-12-02 19:51:01,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 36 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:01,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2023-12-02 19:51:01,109 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 10 [2023-12-02 19:51:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:01,109 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2023-12-02 19:51:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2023-12-02 19:51:01,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:51:01,110 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:01,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:01,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-12-02 19:51:01,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:01,311 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:01,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:01,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2072135593, now seen corresponding path program 1 times [2023-12-02 19:51:01,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:01,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474964033] [2023-12-02 19:51:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:01,312 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 [2023-12-02 19:51:01,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:01,313 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:01,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-12-02 19:51:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:01,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:51:01,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:01,358 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 [2023-12-02 19:51:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:01,379 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:51:01,379 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:01,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474964033] [2023-12-02 19:51:01,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474964033] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:51:01,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:51:01,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:51:01,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303199898] [2023-12-02 19:51:01,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:51:01,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:51:01,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:51:01,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:51:01,381 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:01,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:01,483 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-12-02 19:51:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:51:01,484 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:51:01,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:01,485 INFO L225 Difference]: With dead ends: 31 [2023-12-02 19:51:01,485 INFO L226 Difference]: Without dead ends: 31 [2023-12-02 19:51:01,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:51:01,486 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 36 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:01,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 14 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:51:01,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-02 19:51:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-02 19:51:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-12-02 19:51:01,490 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 10 [2023-12-02 19:51:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:01,490 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-12-02 19:51:01,490 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:01,490 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-12-02 19:51:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:51:01,491 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:01,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:01,493 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-12-02 19:51:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:01,692 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:01,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2072135594, now seen corresponding path program 1 times [2023-12-02 19:51:01,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:01,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1198192724] [2023-12-02 19:51:01,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:01,692 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 [2023-12-02 19:51:01,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:01,693 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:01,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:01,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:01,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 19:51:01,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:01,751 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 8 treesize of output 7 [2023-12-02 19:51:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:01,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:02,264 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1198192724] [2023-12-02 19:51:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1198192724] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 19:51:02,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 19:51:02,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-12-02 19:51:02,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842203088] [2023-12-02 19:51:02,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:51:02,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:51:02,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:02,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:51:02,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:51:02,265 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:02,576 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-12-02 19:51:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 19:51:02,578 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:51:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:02,578 INFO L225 Difference]: With dead ends: 39 [2023-12-02 19:51:02,579 INFO L226 Difference]: Without dead ends: 39 [2023-12-02 19:51:02,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 19:51:02,580 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:02,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 19 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:51:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-02 19:51:02,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-12-02 19:51:02,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-12-02 19:51:02,584 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 10 [2023-12-02 19:51:02,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:02,585 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-12-02 19:51:02,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-12-02 19:51:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:51:02,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:02,586 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:02,589 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:02,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:02,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:02,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:02,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2072135640, now seen corresponding path program 1 times [2023-12-02 19:51:02,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:02,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1292383646] [2023-12-02 19:51:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:02,790 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 [2023-12-02 19:51:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:02,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:02,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:02,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:51:02,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:02,851 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 8 treesize of output 7 [2023-12-02 19:51:03,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:03,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:51:03,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:03,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1292383646] [2023-12-02 19:51:03,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1292383646] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:51:03,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:51:03,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:51:03,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090100542] [2023-12-02 19:51:03,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:51:03,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:51:03,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:03,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:51:03,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:51:03,054 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:03,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:03,413 INFO L93 Difference]: Finished difference Result 50 states and 59 transitions. [2023-12-02 19:51:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:51:03,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:51:03,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:03,414 INFO L225 Difference]: With dead ends: 50 [2023-12-02 19:51:03,414 INFO L226 Difference]: Without dead ends: 50 [2023-12-02 19:51:03,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-12-02 19:51:03,415 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 75 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:03,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 8 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:51:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-02 19:51:03,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2023-12-02 19:51:03,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.4848484848484849) internal successors, (49), 38 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:03,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-12-02 19:51:03,418 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 10 [2023-12-02 19:51:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:03,418 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-12-02 19:51:03,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-12-02 19:51:03,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 19:51:03,418 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:03,418 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:03,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:51:03,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:03,619 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:03,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:03,619 INFO L85 PathProgramCache]: Analyzing trace with hash -188304613, now seen corresponding path program 1 times [2023-12-02 19:51:03,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:03,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706786057] [2023-12-02 19:51:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:03,620 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 [2023-12-02 19:51:03,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:03,621 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:03,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-12-02 19:51:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:03,662 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:51:03,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:03,680 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 8 treesize of output 7 [2023-12-02 19:51:03,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:03,883 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 19:51:03,883 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:03,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [706786057] [2023-12-02 19:51:03,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [706786057] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:51:03,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:51:03,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 19:51:03,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543068120] [2023-12-02 19:51:03,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:51:03,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 19:51:03,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 19:51:03,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:51:03,885 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:04,479 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2023-12-02 19:51:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 19:51:04,480 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 19:51:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:04,480 INFO L225 Difference]: With dead ends: 60 [2023-12-02 19:51:04,480 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 19:51:04,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:51:04,481 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 121 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:04,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 21 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:51:04,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 19:51:04,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 48. [2023-12-02 19:51:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:04,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2023-12-02 19:51:04,486 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 11 [2023-12-02 19:51:04,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:04,486 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2023-12-02 19:51:04,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:04,486 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2023-12-02 19:51:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:51:04,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:04,487 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2023-12-02 19:51:04,490 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-12-02 19:51:04,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:04,688 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:04,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:04,688 INFO L85 PathProgramCache]: Analyzing trace with hash 876454, now seen corresponding path program 2 times [2023-12-02 19:51:04,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:04,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060303179] [2023-12-02 19:51:04,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:51:04,688 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 [2023-12-02 19:51:04,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:04,689 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:04,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:04,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:51:04,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:51:04,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 19:51:04,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:04,753 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 8 treesize of output 7 [2023-12-02 19:51:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:05,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:05,881 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:05,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060303179] [2023-12-02 19:51:05,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060303179] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:05,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1902512964] [2023-12-02 19:51:05,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:51:05,882 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:05,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:51:05,883 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:51:05,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2023-12-02 19:51:06,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:51:06,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:51:06,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 19:51:06,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:06,030 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 8 treesize of output 7 [2023-12-02 19:51:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:06,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:07,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1902512964] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:07,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96582153] [2023-12-02 19:51:07,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:51:07,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:51:07,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:51:07,310 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:51:07,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 19:51:07,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:51:07,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:51:07,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:51:07,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:07,392 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 8 treesize of output 7 [2023-12-02 19:51:07,602 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:07,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:09,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96582153] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:09,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:51:09,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 27 [2023-12-02 19:51:09,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651703260] [2023-12-02 19:51:09,008 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:51:09,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 19:51:09,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 19:51:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2023-12-02 19:51:09,010 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:13,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:13,349 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-12-02 19:51:13,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 19:51:13,349 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 19:51:13,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:13,350 INFO L225 Difference]: With dead ends: 68 [2023-12-02 19:51:13,350 INFO L226 Difference]: Without dead ends: 68 [2023-12-02 19:51:13,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=580, Invalid=1312, Unknown=0, NotChecked=0, Total=1892 [2023-12-02 19:51:13,352 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:13,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 83 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 19:51:13,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-12-02 19:51:13,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2023-12-02 19:51:13,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.462962962962963) internal successors, (79), 59 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:13,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 79 transitions. [2023-12-02 19:51:13,355 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 79 transitions. Word has length 13 [2023-12-02 19:51:13,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:13,355 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 79 transitions. [2023-12-02 19:51:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:13,356 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 79 transitions. [2023-12-02 19:51:13,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-02 19:51:13,356 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:13,357 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:13,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-02 19:51:13,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2023-12-02 19:51:13,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:51:13,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:13,958 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:13,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:13,958 INFO L85 PathProgramCache]: Analyzing trace with hash -38930048, now seen corresponding path program 1 times [2023-12-02 19:51:13,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:13,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [282953695] [2023-12-02 19:51:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:13,958 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 [2023-12-02 19:51:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:13,959 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:13,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:14,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:14,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:51:14,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:14,024 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 8 treesize of output 7 [2023-12-02 19:51:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:14,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:15,233 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:15,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [282953695] [2023-12-02 19:51:15,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [282953695] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1078209433] [2023-12-02 19:51:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:15,234 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:15,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:51:15,235 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:51:15,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 19:51:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:15,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:51:15,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:51:15,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:16,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 19:51:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1078209433] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:16,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908316717] [2023-12-02 19:51:16,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:16,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:51:16,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:51:16,152 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:51:16,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 19:51:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:16,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:51:16,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:16,234 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 8 treesize of output 7 [2023-12-02 19:51:16,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:16,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908316717] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:16,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:51:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7, 7, 8, 9] total 26 [2023-12-02 19:51:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531144990] [2023-12-02 19:51:16,592 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:51:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-02 19:51:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-02 19:51:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-12-02 19:51:16,593 INFO L87 Difference]: Start difference. First operand 60 states and 79 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:18,236 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2023-12-02 19:51:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 19:51:18,238 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-12-02 19:51:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:18,238 INFO L225 Difference]: With dead ends: 62 [2023-12-02 19:51:18,238 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 19:51:18,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2023-12-02 19:51:18,239 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:18,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 100 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-02 19:51:18,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 19:51:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-12-02 19:51:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.4444444444444444) internal successors, (78), 59 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:18,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 78 transitions. [2023-12-02 19:51:18,243 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 78 transitions. Word has length 15 [2023-12-02 19:51:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:18,243 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 78 transitions. [2023-12-02 19:51:18,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 78 transitions. [2023-12-02 19:51:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 19:51:18,244 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:18,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:18,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:51:18,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-02 19:51:18,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Ended with exit code 0 [2023-12-02 19:51:18,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:18,845 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:18,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:18,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1155639723, now seen corresponding path program 2 times [2023-12-02 19:51:18,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [278392928] [2023-12-02 19:51:18,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:51:18,846 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 [2023-12-02 19:51:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:18,847 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:18,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:18,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:51:18,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:51:18,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 19:51:18,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:18,927 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 8 treesize of output 7 [2023-12-02 19:51:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:19,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:20,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:20,433 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [278392928] [2023-12-02 19:51:20,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [278392928] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:20,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1686862130] [2023-12-02 19:51:20,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:51:20,433 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:20,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:51:20,434 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:51:20,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2023-12-02 19:51:20,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:51:20,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:51:20,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:51:20,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:21,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:21,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:21,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1686862130] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:21,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156033392] [2023-12-02 19:51:21,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:51:21,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:51:21,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:51:21,623 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:51:21,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-02 19:51:21,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:51:21,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:51:21,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:51:21,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:21,712 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 8 treesize of output 7 [2023-12-02 19:51:21,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:21,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:22,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156033392] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:22,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:51:22,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 11, 10, 8, 8] total 33 [2023-12-02 19:51:22,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254163102] [2023-12-02 19:51:22,624 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:51:22,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-02 19:51:22,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:22,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-02 19:51:22,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2023-12-02 19:51:22,626 INFO L87 Difference]: Start difference. First operand 60 states and 78 transitions. Second operand has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:31,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:31,002 INFO L93 Difference]: Finished difference Result 179 states and 214 transitions. [2023-12-02 19:51:31,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-02 19:51:31,004 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 19:51:31,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:31,004 INFO L225 Difference]: With dead ends: 179 [2023-12-02 19:51:31,005 INFO L226 Difference]: Without dead ends: 179 [2023-12-02 19:51:31,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=785, Invalid=3907, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 19:51:31,006 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 611 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:31,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 46 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 19:51:31,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-12-02 19:51:31,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 122. [2023-12-02 19:51:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.4224137931034482) internal successors, (165), 121 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2023-12-02 19:51:31,011 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 17 [2023-12-02 19:51:31,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:31,011 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2023-12-02 19:51:31,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 33 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2023-12-02 19:51:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 19:51:31,012 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:31,012 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:31,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (24)] Ended with exit code 0 [2023-12-02 19:51:31,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 [2023-12-02 19:51:31,418 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-02 19:51:31,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:51:31,613 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:31,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:31,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1465092522, now seen corresponding path program 1 times [2023-12-02 19:51:31,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:31,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37090197] [2023-12-02 19:51:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:31,614 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 [2023-12-02 19:51:31,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:31,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:31,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 19:51:31,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:31,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:51:31,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:31,695 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 8 treesize of output 7 [2023-12-02 19:51:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:32,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:32,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:32,644 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37090197] [2023-12-02 19:51:32,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37090197] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:32,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [163005775] [2023-12-02 19:51:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:32,644 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:32,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:51:32,645 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:51:32,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 19:51:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:32,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 19:51:32,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:32,791 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 8 treesize of output 7 [2023-12-02 19:51:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:33,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:51:34,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [163005775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:34,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215116116] [2023-12-02 19:51:34,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:34,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:51:34,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:51:34,449 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:51:34,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 19:51:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:34,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:51:34,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:34,528 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 8 treesize of output 7 [2023-12-02 19:51:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:34,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215116116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:34,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:51:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10, 9, 7, 6] total 26 [2023-12-02 19:51:34,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203092904] [2023-12-02 19:51:34,927 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:51:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 19:51:34,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 19:51:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2023-12-02 19:51:34,928 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:42,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:51:42,899 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2023-12-02 19:51:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-02 19:51:42,901 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-02 19:51:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:51:42,902 INFO L225 Difference]: With dead ends: 219 [2023-12-02 19:51:42,902 INFO L226 Difference]: Without dead ends: 219 [2023-12-02 19:51:42,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=882, Invalid=2900, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 19:51:42,904 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 742 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 742 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:51:42,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [742 Valid, 43 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-12-02 19:51:42,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-02 19:51:42,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 97. [2023-12-02 19:51:42,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.3804347826086956) internal successors, (127), 96 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 127 transitions. [2023-12-02 19:51:42,907 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 127 transitions. Word has length 18 [2023-12-02 19:51:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:51:42,908 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 127 transitions. [2023-12-02 19:51:42,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 27 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:51:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 127 transitions. [2023-12-02 19:51:42,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:51:42,909 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:51:42,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:51:42,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 19:51:43,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 19:51:43,312 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 19:51:43,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:51:43,510 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:51:43,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:51:43,510 INFO L85 PathProgramCache]: Analyzing trace with hash -631781897, now seen corresponding path program 1 times [2023-12-02 19:51:43,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:51:43,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401082034] [2023-12-02 19:51:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:43,511 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 [2023-12-02 19:51:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:51:43,512 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:51:43,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-12-02 19:51:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:43,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 19:51:43,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:43,608 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 8 treesize of output 7 [2023-12-02 19:51:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:43,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:44,781 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:51:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401082034] [2023-12-02 19:51:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401082034] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1218821837] [2023-12-02 19:51:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:44,782 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:51:44,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:51:44,782 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:51:44,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 19:51:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:44,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:51:44,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:45,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:46,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:51:46,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1218821837] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:46,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712482512] [2023-12-02 19:51:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:51:46,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:51:46,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:51:46,087 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:51:46,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 19:51:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:51:46,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 19:51:46,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:51:46,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:46,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:51:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 19:51:47,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712482512] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:51:47,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:51:47,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 10, 9, 10, 8] total 40 [2023-12-02 19:51:47,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252306045] [2023-12-02 19:51:47,501 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:51:47,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 19:51:47,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:51:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 19:51:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 19:51:47,503 INFO L87 Difference]: Start difference. First operand 97 states and 127 transitions. Second operand has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:52:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:52:15,771 INFO L93 Difference]: Finished difference Result 305 states and 360 transitions. [2023-12-02 19:52:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-12-02 19:52:15,772 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 19:52:15,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:52:15,773 INFO L225 Difference]: With dead ends: 305 [2023-12-02 19:52:15,773 INFO L226 Difference]: Without dead ends: 275 [2023-12-02 19:52:15,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6123 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=2923, Invalid=16537, Unknown=0, NotChecked=0, Total=19460 [2023-12-02 19:52:15,778 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1213 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1213 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2023-12-02 19:52:15,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1213 Valid, 74 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1392 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2023-12-02 19:52:15,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-12-02 19:52:15,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 135. [2023-12-02 19:52:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.3846153846153846) internal successors, (180), 134 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:52:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 180 transitions. [2023-12-02 19:52:15,784 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 180 transitions. Word has length 24 [2023-12-02 19:52:15,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:52:15,785 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 180 transitions. [2023-12-02 19:52:15,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.9) internal successors, (116), 40 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:52:15,785 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 180 transitions. [2023-12-02 19:52:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 19:52:15,786 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:52:15,786 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1] [2023-12-02 19:52:15,792 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 19:52:15,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2023-12-02 19:52:16,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-12-02 19:52:16,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:52:16,387 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:52:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:52:16,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1124645864, now seen corresponding path program 3 times [2023-12-02 19:52:16,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:52:16,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2102697156] [2023-12-02 19:52:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:52:16,388 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 [2023-12-02 19:52:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:52:16,388 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:52:16,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-12-02 19:52:16,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 19:52:16,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:52:16,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 19:52:16,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:52:16,615 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 8 treesize of output 7 [2023-12-02 19:52:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:52:17,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:52:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:52:19,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:52:19,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2102697156] [2023-12-02 19:52:19,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2102697156] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:52:19,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1783004491] [2023-12-02 19:52:19,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:52:19,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:52:19,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:52:19,812 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:52:19,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-12-02 19:52:20,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 19:52:20,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:52:20,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 19:52:20,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:52:20,732 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 8 treesize of output 7 [2023-12-02 19:52:21,009 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:52:21,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:52:27,335 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:52:27,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1783004491] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:52:27,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89259478] [2023-12-02 19:52:27,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:52:27,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:52:27,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:52:27,336 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:52:27,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 19:52:31,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 19:52:31,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:52:31,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 19:52:31,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:52:31,931 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 8 treesize of output 7 [2023-12-02 19:52:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:52:32,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:52:38,214 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:52:38,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89259478] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:52:38,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:52:38,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14, 14, 14] total 51 [2023-12-02 19:52:38,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132493164] [2023-12-02 19:52:38,214 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:52:38,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-12-02 19:52:38,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:52:38,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-12-02 19:52:38,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=686, Invalid=1966, Unknown=0, NotChecked=0, Total=2652 [2023-12-02 19:52:38,216 INFO L87 Difference]: Start difference. First operand 135 states and 180 transitions. Second operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:53:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:53:09,969 INFO L93 Difference]: Finished difference Result 177 states and 234 transitions. [2023-12-02 19:53:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 19:53:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.0) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 19:53:09,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:53:09,972 INFO L225 Difference]: With dead ends: 177 [2023-12-02 19:53:09,972 INFO L226 Difference]: Without dead ends: 177 [2023-12-02 19:53:09,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 38.4s TimeCoverageRelationStatistics Valid=2123, Invalid=5187, Unknown=0, NotChecked=0, Total=7310 [2023-12-02 19:53:09,975 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 329 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:53:09,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 129 Invalid, 958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-12-02 19:53:09,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-12-02 19:53:09,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 159. [2023-12-02 19:53:09,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.4025974025974026) internal successors, (216), 158 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:53:09,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 216 transitions. [2023-12-02 19:53:09,980 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 216 transitions. Word has length 25 [2023-12-02 19:53:09,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:53:09,981 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 216 transitions. [2023-12-02 19:53:09,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.0) internal successors, (102), 52 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:53:09,981 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 216 transitions. [2023-12-02 19:53:09,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:53:09,982 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:53:09,982 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:53:09,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-12-02 19:53:10,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-12-02 19:53:10,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-12-02 19:53:10,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:53:10,583 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:53:10,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:53:10,583 INFO L85 PathProgramCache]: Analyzing trace with hash 2061123475, now seen corresponding path program 1 times [2023-12-02 19:53:10,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:53:10,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1255997106] [2023-12-02 19:53:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:53:10,584 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 [2023-12-02 19:53:10,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:53:10,585 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:53:10,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-12-02 19:53:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:53:10,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:53:10,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:53:10,725 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 8 treesize of output 7 [2023-12-02 19:53:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:53:11,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:53:12,732 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:53:12,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:53:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1255997106] [2023-12-02 19:53:12,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1255997106] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:53:12,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1942548006] [2023-12-02 19:53:12,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:53:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:53:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:53:12,733 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:53:12,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 19:53:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:53:12,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 19:53:12,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:53:12,946 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 8 treesize of output 7 [2023-12-02 19:53:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:53:14,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:53:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:53:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1942548006] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:53:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325541361] [2023-12-02 19:53:16,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:53:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:53:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:53:16,104 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:53:16,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 19:53:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:53:16,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:53:16,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:53:16,225 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 8 treesize of output 7 [2023-12-02 19:53:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:53:16,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:53:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:53:17,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325541361] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:53:17,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:53:17,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 12, 11, 10, 9] total 35 [2023-12-02 19:53:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624914723] [2023-12-02 19:53:17,081 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:53:17,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-12-02 19:53:17,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:53:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-12-02 19:53:17,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 19:53:17,083 INFO L87 Difference]: Start difference. First operand 159 states and 216 transitions. Second operand has 36 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:53:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:53:26,649 INFO L93 Difference]: Finished difference Result 266 states and 325 transitions. [2023-12-02 19:53:26,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 19:53:26,650 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 19:53:26,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:53:26,652 INFO L225 Difference]: With dead ends: 266 [2023-12-02 19:53:26,652 INFO L226 Difference]: Without dead ends: 265 [2023-12-02 19:53:26,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1066, Invalid=3904, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 19:53:26,654 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1438 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1438 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:53:26,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1438 Valid, 99 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2023-12-02 19:53:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-12-02 19:53:26,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 194. [2023-12-02 19:53:26,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.3650793650793651) internal successors, (258), 193 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:53:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 258 transitions. [2023-12-02 19:53:26,658 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 258 transitions. Word has length 30 [2023-12-02 19:53:26,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:53:26,658 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 258 transitions. [2023-12-02 19:53:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 36 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:53:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 258 transitions. [2023-12-02 19:53:26,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 19:53:26,659 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:53:26,659 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:53:26,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-12-02 19:53:26,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-12-02 19:53:27,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2023-12-02 19:53:27,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 19:53:27,260 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:53:27,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:53:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1222739582, now seen corresponding path program 3 times [2023-12-02 19:53:27,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:53:27,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1557177059] [2023-12-02 19:53:27,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:53:27,261 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 [2023-12-02 19:53:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:53:27,262 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:53:27,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2023-12-02 19:53:27,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 19:53:27,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:53:27,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 19:53:27,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:53:27,524 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 8 treesize of output 7 [2023-12-02 19:53:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:53:28,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:53:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:53:32,401 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:53:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1557177059] [2023-12-02 19:53:32,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1557177059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:53:32,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1415473030] [2023-12-02 19:53:32,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:53:32,401 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:53:32,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:53:32,402 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:53:32,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 19:53:33,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 19:53:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:53:33,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 19:53:33,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:53:33,503 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 8 treesize of output 7 [2023-12-02 19:53:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:53:35,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:53:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:53:46,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1415473030] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:53:46,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047446319] [2023-12-02 19:53:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:53:46,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:53:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:53:46,448 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:53:46,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 19:53:46,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 19:53:46,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:53:46,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:53:46,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:53:46,769 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 8 treesize of output 7 [2023-12-02 19:53:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 17 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:53:47,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:53:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:53:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047446319] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:53:54,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:53:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 17, 18, 14, 14] total 65 [2023-12-02 19:53:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64976732] [2023-12-02 19:53:54,063 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:53:54,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-02 19:53:54,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:53:54,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-02 19:53:54,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 19:53:54,066 INFO L87 Difference]: Start difference. First operand 194 states and 258 transitions. Second operand has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:55:00,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:55:00,486 INFO L93 Difference]: Finished difference Result 357 states and 451 transitions. [2023-12-02 19:55:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-12-02 19:55:00,487 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 19:55:00,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:55:00,488 INFO L225 Difference]: With dead ends: 357 [2023-12-02 19:55:00,488 INFO L226 Difference]: Without dead ends: 357 [2023-12-02 19:55:00,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5282 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=3188, Invalid=15444, Unknown=0, NotChecked=0, Total=18632 [2023-12-02 19:55:00,491 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1164 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:55:00,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 139 Invalid, 1816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2023-12-02 19:55:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2023-12-02 19:55:00,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 188. [2023-12-02 19:55:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.355191256830601) internal successors, (248), 187 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:55:00,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 248 transitions. [2023-12-02 19:55:00,496 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 248 transitions. Word has length 34 [2023-12-02 19:55:00,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:55:00,496 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 248 transitions. [2023-12-02 19:55:00,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4153846153846152) internal successors, (157), 65 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:55:00,497 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 248 transitions. [2023-12-02 19:55:00,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 19:55:00,497 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:55:00,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:55:00,503 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2023-12-02 19:55:00,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-12-02 19:55:00,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (38)] Ended with exit code 0 [2023-12-02 19:55:01,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:55:01,099 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:55:01,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:55:01,099 INFO L85 PathProgramCache]: Analyzing trace with hash -42995402, now seen corresponding path program 1 times [2023-12-02 19:55:01,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:55:01,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2036557073] [2023-12-02 19:55:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:55:01,100 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 [2023-12-02 19:55:01,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:55:01,100 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:55:01,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2023-12-02 19:55:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:55:01,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:55:01,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:55:01,250 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 8 treesize of output 7 [2023-12-02 19:55:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:55:01,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:55:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:55:03,290 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:55:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2036557073] [2023-12-02 19:55:03,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2036557073] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:55:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1915549412] [2023-12-02 19:55:03,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:55:03,290 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:55:03,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:55:03,291 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:55:03,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2023-12-02 19:55:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:55:03,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 19:55:03,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:55:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:55:04,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:55:05,551 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 19:55:05,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1915549412] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:55:05,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234543084] [2023-12-02 19:55:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:55:05,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:55:05,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:55:05,552 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:55:05,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 19:55:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:55:05,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 19:55:05,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:55:06,380 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:55:06,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:55:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 19:55:07,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234543084] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:55:07,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:55:07,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13, 12, 12, 10] total 50 [2023-12-02 19:55:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260168704] [2023-12-02 19:55:07,444 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:55:07,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-02 19:55:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:55:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-02 19:55:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2200, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 19:55:07,446 INFO L87 Difference]: Start difference. First operand 188 states and 248 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 50 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:55:40,262 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:55:46,746 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:55:48,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:55:49,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:55:55,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:55:57,253 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:56:03,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:56:08,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:56:09,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:56:11,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:56:16,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 19:56:27,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:56:27,680 INFO L93 Difference]: Finished difference Result 547 states and 662 transitions. [2023-12-02 19:56:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2023-12-02 19:56:27,680 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 50 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-12-02 19:56:27,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:56:27,683 INFO L225 Difference]: With dead ends: 547 [2023-12-02 19:56:27,683 INFO L226 Difference]: Without dead ends: 547 [2023-12-02 19:56:27,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20290 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=8343, Invalid=44787, Unknown=0, NotChecked=0, Total=53130 [2023-12-02 19:56:27,687 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4185 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2363 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4185 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 2363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:56:27,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4185 Valid, 159 Invalid, 2534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 2363 Invalid, 0 Unknown, 0 Unchecked, 26.1s Time] [2023-12-02 19:56:27,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-12-02 19:56:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 310. [2023-12-02 19:56:27,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.337704918032787) internal successors, (408), 309 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:56:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 408 transitions. [2023-12-02 19:56:27,696 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 408 transitions. Word has length 36 [2023-12-02 19:56:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:56:27,696 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 408 transitions. [2023-12-02 19:56:27,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 50 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:56:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 408 transitions. [2023-12-02 19:56:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 19:56:27,697 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:56:27,697 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:56:27,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2023-12-02 19:56:27,904 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-12-02 19:56:28,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (41)] Ended with exit code 0 [2023-12-02 19:56:28,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 19:56:28,298 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:56:28,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:56:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1784734017, now seen corresponding path program 4 times [2023-12-02 19:56:28,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:56:28,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1444569573] [2023-12-02 19:56:28,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:56:28,299 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 [2023-12-02 19:56:28,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:56:28,300 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:56:28,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Waiting until timeout for monitored process [2023-12-02 19:56:28,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:56:28,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:56:28,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 19:56:28,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:56:28,470 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 8 treesize of output 7 [2023-12-02 19:56:29,411 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:56:29,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:56:34,065 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:56:34,066 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:56:34,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1444569573] [2023-12-02 19:56:34,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1444569573] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:56:34,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033674587] [2023-12-02 19:56:34,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:56:34,066 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:56:34,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:56:34,067 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:56:34,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 19:56:34,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:56:34,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:56:34,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 19:56:34,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:56:35,946 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:56:35,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:56:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 34 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-12-02 19:56:38,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2033674587] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:56:38,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904184999] [2023-12-02 19:56:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:56:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:56:38,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:56:38,356 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:56:38,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 19:56:38,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:56:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:56:38,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 19:56:38,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:56:38,508 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 8 treesize of output 7 [2023-12-02 19:56:38,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 19:56:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:56:39,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:56:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:56:43,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904184999] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:56:43,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:56:43,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 15, 14, 16, 15] total 67 [2023-12-02 19:56:43,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81211237] [2023-12-02 19:56:43,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:56:43,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-12-02 19:56:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:56:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-12-02 19:56:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=4026, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 19:56:43,110 INFO L87 Difference]: Start difference. First operand 310 states and 408 transitions. Second operand has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:56:57,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 19:57:53,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:57:53,832 INFO L93 Difference]: Finished difference Result 795 states and 1019 transitions. [2023-12-02 19:57:53,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-12-02 19:57:53,834 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-12-02 19:57:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:57:53,839 INFO L225 Difference]: With dead ends: 795 [2023-12-02 19:57:53,840 INFO L226 Difference]: Without dead ends: 791 [2023-12-02 19:57:53,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5920 ImplicationChecksByTransitivity, 62.8s TimeCoverageRelationStatistics Valid=4157, Invalid=21603, Unknown=0, NotChecked=0, Total=25760 [2023-12-02 19:57:53,843 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1840 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1840 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:57:53,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1840 Valid, 295 Invalid, 3116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3059 Invalid, 0 Unknown, 0 Unchecked, 19.2s Time] [2023-12-02 19:57:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2023-12-02 19:57:53,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 437. [2023-12-02 19:57:53,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 432 states have (on average 1.3125) internal successors, (567), 436 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:57:53,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 567 transitions. [2023-12-02 19:57:53,861 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 567 transitions. Word has length 41 [2023-12-02 19:57:53,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:57:53,861 INFO L495 AbstractCegarLoop]: Abstraction has 437 states and 567 transitions. [2023-12-02 19:57:53,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.4477611940298507) internal successors, (164), 67 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:57:53,862 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 567 transitions. [2023-12-02 19:57:53,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 19:57:53,863 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:57:53,863 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:57:53,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 19:57:54,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Ended with exit code 0 [2023-12-02 19:57:54,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 19:57:54,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 19:57:54,464 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:57:54,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:57:54,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1964855811, now seen corresponding path program 2 times [2023-12-02 19:57:54,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:57:54,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924899528] [2023-12-02 19:57:54,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:57:54,465 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 [2023-12-02 19:57:54,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:57:54,466 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:57:54,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 19:57:54,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:57:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:57:54,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-02 19:57:54,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:57:54,755 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 8 treesize of output 7 [2023-12-02 19:57:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:57:55,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:57:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 19:57:58,766 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:57:58,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924899528] [2023-12-02 19:57:58,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924899528] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:57:58,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774320621] [2023-12-02 19:57:58,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:57:58,767 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:57:58,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:57:58,767 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:57:58,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Waiting until timeout for monitored process [2023-12-02 19:57:59,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:57:59,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:57:59,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 19:57:59,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:58:00,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:02,514 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-02 19:58:02,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774320621] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:02,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307267560] [2023-12-02 19:58:02,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 19:58:02,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:02,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:02,515 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:02,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-12-02 19:58:02,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 19:58:02,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:58:02,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 19:58:02,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:02,687 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 8 treesize of output 7 [2023-12-02 19:58:02,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-12-02 19:58:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 19:58:03,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:05,996 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 19:58:05,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307267560] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:05,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 19:58:05,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 15, 14, 13, 10] total 62 [2023-12-02 19:58:05,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908107774] [2023-12-02 19:58:05,997 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:05,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 19:58:05,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 19:58:05,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 19:58:05,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3483, Unknown=0, NotChecked=0, Total=3782 [2023-12-02 19:58:05,999 INFO L87 Difference]: Start difference. First operand 437 states and 567 transitions. Second operand has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:05,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:05,679 INFO L93 Difference]: Finished difference Result 732 states and 912 transitions. [2023-12-02 19:59:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-12-02 19:59:05,681 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-02 19:59:05,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:05,685 INFO L225 Difference]: With dead ends: 732 [2023-12-02 19:59:05,685 INFO L226 Difference]: Without dead ends: 702 [2023-12-02 19:59:05,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9830 ImplicationChecksByTransitivity, 54.8s TimeCoverageRelationStatistics Valid=3707, Invalid=29599, Unknown=0, NotChecked=0, Total=33306 [2023-12-02 19:59:05,688 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2244 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 3242 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2244 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 3383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:05,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2244 Valid, 252 Invalid, 3383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3242 Invalid, 0 Unknown, 0 Unchecked, 12.9s Time] [2023-12-02 19:59:05,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2023-12-02 19:59:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 390. [2023-12-02 19:59:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 385 states have (on average 1.3402597402597403) internal successors, (516), 389 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:05,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 516 transitions. [2023-12-02 19:59:05,701 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 516 transitions. Word has length 44 [2023-12-02 19:59:05,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:05,702 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 516 transitions. [2023-12-02 19:59:05,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.774193548387097) internal successors, (172), 62 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:05,702 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 516 transitions. [2023-12-02 19:59:05,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:59:05,703 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:05,703 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:59:05,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2023-12-02 19:59:05,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-12-02 19:59:06,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (48)] Forceful destruction successful, exit code 0 [2023-12-02 19:59:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 19:59:06,304 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-12-02 19:59:06,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -835882153, now seen corresponding path program 5 times [2023-12-02 19:59:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 19:59:06,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355109521] [2023-12-02 19:59:06,305 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 19:59:06,305 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 [2023-12-02 19:59:06,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 19:59:06,306 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -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) [2023-12-02 19:59:06,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-12-02 19:59:06,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-02 19:59:06,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:59:06,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 19:59:06,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:06,808 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 8 treesize of output 7 [2023-12-02 19:59:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:08,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:16,985 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 6 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:16,985 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 19:59:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355109521] [2023-12-02 19:59:16,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355109521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:16,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1952954505] [2023-12-02 19:59:16,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 19:59:16,985 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 19:59:16,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 19:59:16,986 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 19:59:16,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 20:03:33,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-02 20:03:33,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:03:33,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 20:03:33,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:37,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:42,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1952954505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:42,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753376203] [2023-12-02 20:03:42,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 20:03:42,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:42,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:42,143 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:42,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fd3f6e02-f2d1-42d9-a8d3-1c0cec628ee3/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 20:04:02,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-02 20:04:02,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:04:02,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2023-12-02 20:04:02,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:02,354 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 8 treesize of output 7 [2023-12-02 20:04:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:05,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:20,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753376203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:20,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:04:20,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20, 18, 19, 20] total 94 [2023-12-02 20:04:20,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371889703] [2023-12-02 20:04:20,394 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:20,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-12-02 20:04:20,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:04:20,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-12-02 20:04:20,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=7785, Unknown=0, NotChecked=0, Total=8742 [2023-12-02 20:04:20,397 INFO L87 Difference]: Start difference. First operand 390 states and 516 transitions. Second operand has 94 states, 94 states have (on average 2.4893617021276597) internal successors, (234), 94 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:48,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:04:50,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:04:52,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:02,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:04,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:15,495 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:23,127 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:34,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:41,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:44,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 20:05:46,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []