./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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_e7acbbe0-70b5-4a04-b907-382461483bd8/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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:01:14,187 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:01:14,255 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 18:01:14,260 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:01:14,260 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:01:14,285 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:01:14,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:01:14,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:01:14,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:01:14,287 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:01:14,288 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:01:14,288 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:01:14,289 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:01:14,289 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 18:01:14,290 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:01:14,290 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:01:14,291 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 18:01:14,291 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 18:01:14,292 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:01:14,292 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 18:01:14,300 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 18:01:14,301 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 18:01:14,302 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:01:14,303 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:01:14,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:01:14,304 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:01:14,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:01:14,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:01:14,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:01:14,305 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:01:14,306 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:01:14,306 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:01:14,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:01:14,307 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:01:14,307 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:01:14,307 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:01:14,307 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:01:14,307 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:01:14,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:01:14,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:01:14,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:01:14,309 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:01:14,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:01:14,309 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 18:01:14,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 18:01:14,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:01:14,309 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:01:14,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:01:14,310 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_e7acbbe0-70b5-4a04-b907-382461483bd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2023-12-02 18:01:14,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:01:14,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:01:14,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:01:14,552 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:01:14,552 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:01:14,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2023-12-02 18:01:17,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:01:17,695 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:01:17,695 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2023-12-02 18:01:17,712 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data/063ead3d5/172d7cfc04904482bcdc55f881831664/FLAG48b7d1750 [2023-12-02 18:01:17,727 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data/063ead3d5/172d7cfc04904482bcdc55f881831664 [2023-12-02 18:01:17,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:01:17,731 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:01:17,732 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:01:17,732 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:01:17,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:01:17,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:01:17" (1/1) ... [2023-12-02 18:01:17,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0f726f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:17, skipping insertion in model container [2023-12-02 18:01:17,740 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:01:17" (1/1) ... [2023-12-02 18:01:17,789 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:01:18,149 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:01:18,168 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 18:01:18,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@28b8a27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:18, skipping insertion in model container [2023-12-02 18:01:18,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:01:18,169 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 18:01:18,171 INFO L158 Benchmark]: Toolchain (without parser) took 439.38ms. Allocated memory is still 140.5MB. Free memory was 93.5MB in the beginning and 77.7MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-12-02 18:01:18,172 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 140.5MB. Free memory is still 108.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 18:01:18,172 INFO L158 Benchmark]: CACSL2BoogieTranslator took 436.90ms. Allocated memory is still 140.5MB. Free memory was 92.9MB in the beginning and 77.7MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-12-02 18:01:18,174 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 140.5MB. Free memory is still 108.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 436.90ms. Allocated memory is still 140.5MB. Free memory was 92.9MB in the beginning and 77.7MB in the end (delta: 15.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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_e7acbbe0-70b5-4a04-b907-382461483bd8/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 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 18:01:19,946 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 18:01:20,029 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 18:01:20,035 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 18:01:20,036 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 18:01:20,067 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 18:01:20,068 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 18:01:20,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 18:01:20,069 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 18:01:20,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 18:01:20,070 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 18:01:20,071 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 18:01:20,071 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 18:01:20,072 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 18:01:20,073 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 18:01:20,073 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 18:01:20,074 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 18:01:20,075 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 18:01:20,075 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 18:01:20,076 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 18:01:20,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 18:01:20,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 18:01:20,078 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 18:01:20,078 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 18:01:20,079 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 18:01:20,079 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 18:01:20,079 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 18:01:20,080 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 18:01:20,080 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 18:01:20,081 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 18:01:20,081 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 18:01:20,082 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 18:01:20,082 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 18:01:20,082 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 18:01:20,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 18:01:20,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 18:01:20,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 18:01:20,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:01:20,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 18:01:20,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 18:01:20,084 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 18:01:20,084 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 18:01:20,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 18:01:20,085 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 18:01:20,085 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 18:01:20,085 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_e7acbbe0-70b5-4a04-b907-382461483bd8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28b4a2248017400eafcc33919e1388faa83abd48459a3d9191abc0a1d3b17a56 [2023-12-02 18:01:20,367 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 18:01:20,387 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 18:01:20,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 18:01:20,391 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 18:01:20,391 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 18:01:20,392 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2023-12-02 18:01:23,244 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 18:01:23,485 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 18:01:23,485 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/sv-benchmarks/c/ldv-memsafety/memleaks_test12-1.i [2023-12-02 18:01:23,504 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data/d79cd5e6b/e102780d85404fec93aee3bc8d489945/FLAGd8049609c [2023-12-02 18:01:23,518 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/data/d79cd5e6b/e102780d85404fec93aee3bc8d489945 [2023-12-02 18:01:23,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 18:01:23,523 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 18:01:23,537 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 18:01:23,537 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 18:01:23,543 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 18:01:23,544 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:01:23" (1/1) ... [2023-12-02 18:01:23,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5798b944 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:23, skipping insertion in model container [2023-12-02 18:01:23,545 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:01:23" (1/1) ... [2023-12-02 18:01:23,598 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:01:24,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:01:24,060 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 18:01:24,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 18:01:24,138 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:01:24,147 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 18:01:24,235 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 18:01:24,278 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 18:01:24,286 INFO L206 MainTranslator]: Completed translation [2023-12-02 18:01:24,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24 WrapperNode [2023-12-02 18:01:24,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 18:01:24,288 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 18:01:24,288 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 18:01:24,288 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 18:01:24,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,361 INFO L138 Inliner]: procedures = 179, calls = 145, calls flagged for inlining = 33, calls inlined = 20, statements flattened = 340 [2023-12-02 18:01:24,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 18:01:24,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 18:01:24,363 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 18:01:24,363 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 18:01:24,373 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,374 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,381 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,382 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,405 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,410 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,414 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,418 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,425 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 18:01:24,426 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 18:01:24,426 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 18:01:24,426 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 18:01:24,427 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (1/1) ... [2023-12-02 18:01:24,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 18:01:24,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:01:24,459 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 18:01:24,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 18:01:24,491 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2023-12-02 18:01:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 18:01:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-12-02 18:01:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-12-02 18:01:24,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2023-12-02 18:01:24,492 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2023-12-02 18:01:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-12-02 18:01:24,493 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-12-02 18:01:24,493 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2023-12-02 18:01:24,493 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2023-12-02 18:01:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-12-02 18:01:24,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-12-02 18:01:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2023-12-02 18:01:24,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2023-12-02 18:01:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 18:01:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 18:01:24,495 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_msg_free [2023-12-02 18:01:24,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_msg_free [2023-12-02 18:01:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 18:01:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-12-02 18:01:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2023-12-02 18:01:24,496 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-12-02 18:01:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2023-12-02 18:01:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 18:01:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-12-02 18:01:24,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2023-12-02 18:01:24,498 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2023-12-02 18:01:24,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 18:01:24,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 18:01:24,691 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 18:01:24,693 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 18:01:24,698 WARN L821 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2023-12-02 18:01:25,899 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 18:01:26,001 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 18:01:26,001 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 18:01:26,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:01:26 BoogieIcfgContainer [2023-12-02 18:01:26,002 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 18:01:26,005 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 18:01:26,005 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 18:01:26,009 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 18:01:26,009 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:01:23" (1/3) ... [2023-12-02 18:01:26,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d28be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:01:26, skipping insertion in model container [2023-12-02 18:01:26,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:01:24" (2/3) ... [2023-12-02 18:01:26,010 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d28be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:01:26, skipping insertion in model container [2023-12-02 18:01:26,010 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:01:26" (3/3) ... [2023-12-02 18:01:26,012 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test12-1.i [2023-12-02 18:01:26,031 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 18:01:26,031 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 124 error locations. [2023-12-02 18:01:26,084 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 18:01:26,091 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;@3aa20528, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 18:01:26,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 124 error locations. [2023-12-02 18:01:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand has 274 states, 132 states have (on average 2.121212121212121) internal successors, (280), 255 states have internal predecessors, (280), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-02 18:01:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:01:26,103 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:26,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:26,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:26,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash -2120471694, now seen corresponding path program 1 times [2023-12-02 18:01:26,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:26,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393983785] [2023-12-02 18:01:26,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:26,118 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 18:01:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:26,138 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:26,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:26,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:01:26,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:26,416 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 18:01:26,416 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:26,417 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:26,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393983785] [2023-12-02 18:01:26,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393983785] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:26,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:26,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:01:26,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051509666] [2023-12-02 18:01:26,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:01:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:01:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:01:26,467 INFO L87 Difference]: Start difference. First operand has 274 states, 132 states have (on average 2.121212121212121) internal successors, (280), 255 states have internal predecessors, (280), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:27,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:27,569 INFO L93 Difference]: Finished difference Result 361 states and 408 transitions. [2023-12-02 18:01:27,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:01:27,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 18:01:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:27,582 INFO L225 Difference]: With dead ends: 361 [2023-12-02 18:01:27,582 INFO L226 Difference]: Without dead ends: 359 [2023-12-02 18:01:27,584 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 18:01:27,587 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 268 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:27,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 399 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 18:01:27,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-12-02 18:01:27,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 296. [2023-12-02 18:01:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 152 states have (on average 2.0921052631578947) internal successors, (318), 273 states have internal predecessors, (318), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2023-12-02 18:01:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 354 transitions. [2023-12-02 18:01:27,642 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 354 transitions. Word has length 10 [2023-12-02 18:01:27,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:27,643 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 354 transitions. [2023-12-02 18:01:27,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:27,643 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 354 transitions. [2023-12-02 18:01:27,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:01:27,644 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:27,644 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:27,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:27,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:27,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:27,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:27,846 INFO L85 PathProgramCache]: Analyzing trace with hash -2120471693, now seen corresponding path program 1 times [2023-12-02 18:01:27,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:27,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [537439713] [2023-12-02 18:01:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:27,846 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 18:01:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:27,848 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:27,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:27,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:01:27,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:28,096 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 18:01:28,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:28,097 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:28,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [537439713] [2023-12-02 18:01:28,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [537439713] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:28,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:28,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:01:28,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386972884] [2023-12-02 18:01:28,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:28,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:01:28,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:28,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:01:28,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:01:28,101 INFO L87 Difference]: Start difference. First operand 296 states and 354 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:29,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:29,079 INFO L93 Difference]: Finished difference Result 414 states and 502 transitions. [2023-12-02 18:01:29,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:01:29,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 18:01:29,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:29,083 INFO L225 Difference]: With dead ends: 414 [2023-12-02 18:01:29,084 INFO L226 Difference]: Without dead ends: 414 [2023-12-02 18:01:29,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 18:01:29,085 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 123 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:29,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 688 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 18:01:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-12-02 18:01:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 353. [2023-12-02 18:01:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 202 states have (on average 2.0544554455445545) internal successors, (415), 322 states have internal predecessors, (415), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (29), 23 states have call predecessors, (29), 22 states have call successors, (29) [2023-12-02 18:01:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 466 transitions. [2023-12-02 18:01:29,118 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 466 transitions. Word has length 10 [2023-12-02 18:01:29,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:29,119 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 466 transitions. [2023-12-02 18:01:29,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:29,119 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 466 transitions. [2023-12-02 18:01:29,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 18:01:29,120 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:29,120 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:29,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Ended with exit code 0 [2023-12-02 18:01:29,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:29,321 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:29,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:29,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1286991922, now seen corresponding path program 1 times [2023-12-02 18:01:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444560774] [2023-12-02 18:01:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:29,322 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 18:01:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:29,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:29,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:29,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:01:29,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:29,421 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 18:01:29,422 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:29,422 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444560774] [2023-12-02 18:01:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444560774] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:29,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:29,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:01:29,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315287609] [2023-12-02 18:01:29,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:29,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:29,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:29,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:29,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:29,424 INFO L87 Difference]: Start difference. First operand 353 states and 466 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:29,925 INFO L93 Difference]: Finished difference Result 564 states and 713 transitions. [2023-12-02 18:01:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:01:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-12-02 18:01:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:29,930 INFO L225 Difference]: With dead ends: 564 [2023-12-02 18:01:29,930 INFO L226 Difference]: Without dead ends: 564 [2023-12-02 18:01:29,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:29,932 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 224 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:29,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1121 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:01:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-12-02 18:01:29,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 344. [2023-12-02 18:01:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 193 states have (on average 2.0259067357512954) internal successors, (391), 314 states have internal predecessors, (391), 21 states have call successors, (21), 9 states have call predecessors, (21), 10 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2023-12-02 18:01:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 446 transitions. [2023-12-02 18:01:29,955 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 446 transitions. Word has length 10 [2023-12-02 18:01:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:29,955 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 446 transitions. [2023-12-02 18:01:29,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 446 transitions. [2023-12-02 18:01:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 18:01:29,956 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:29,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:29,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Forceful destruction successful, exit code 0 [2023-12-02 18:01:30,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:30,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:30,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:30,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1310109316, now seen corresponding path program 1 times [2023-12-02 18:01:30,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:30,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [334555424] [2023-12-02 18:01:30,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:30,158 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 18:01:30,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:30,159 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:30,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:30,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:30,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:01:30,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:30,381 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 18:01:30,382 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:30,382 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [334555424] [2023-12-02 18:01:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [334555424] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:30,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:30,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:01:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715201599] [2023-12-02 18:01:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:30,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:30,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:30,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:30,385 INFO L87 Difference]: Start difference. First operand 344 states and 446 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:31,236 INFO L93 Difference]: Finished difference Result 382 states and 487 transitions. [2023-12-02 18:01:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:01:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 18:01:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:31,240 INFO L225 Difference]: With dead ends: 382 [2023-12-02 18:01:31,240 INFO L226 Difference]: Without dead ends: 382 [2023-12-02 18:01:31,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:01:31,241 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 50 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:31,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 762 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:01:31,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-12-02 18:01:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 355. [2023-12-02 18:01:31,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 201 states have (on average 2.0) internal successors, (402), 323 states have internal predecessors, (402), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2023-12-02 18:01:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 457 transitions. [2023-12-02 18:01:31,257 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 457 transitions. Word has length 11 [2023-12-02 18:01:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:31,257 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 457 transitions. [2023-12-02 18:01:31,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 457 transitions. [2023-12-02 18:01:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 18:01:31,258 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:31,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:31,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:31,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:31,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:31,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:31,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1310109315, now seen corresponding path program 1 times [2023-12-02 18:01:31,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:31,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [854943245] [2023-12-02 18:01:31,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:31,460 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 18:01:31,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:31,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:31,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (6)] Waiting until timeout for monitored process [2023-12-02 18:01:31,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:31,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:01:31,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:31,797 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 18:01:31,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:31,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:31,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [854943245] [2023-12-02 18:01:31,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [854943245] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:31,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:31,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:01:31,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69124478] [2023-12-02 18:01:31,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:31,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:31,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:31,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:31,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:31,800 INFO L87 Difference]: Start difference. First operand 355 states and 457 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:33,112 INFO L93 Difference]: Finished difference Result 372 states and 470 transitions. [2023-12-02 18:01:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:01:33,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-12-02 18:01:33,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:33,115 INFO L225 Difference]: With dead ends: 372 [2023-12-02 18:01:33,115 INFO L226 Difference]: Without dead ends: 372 [2023-12-02 18:01:33,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:01:33,116 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 27 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:33,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 860 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 18:01:33,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-12-02 18:01:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 362. [2023-12-02 18:01:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 208 states have (on average 1.9855769230769231) internal successors, (413), 330 states have internal predecessors, (413), 21 states have call successors, (21), 11 states have call predecessors, (21), 13 states have return successors, (34), 22 states have call predecessors, (34), 21 states have call successors, (34) [2023-12-02 18:01:33,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 468 transitions. [2023-12-02 18:01:33,126 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 468 transitions. Word has length 11 [2023-12-02 18:01:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:33,126 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 468 transitions. [2023-12-02 18:01:33,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:33,127 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 468 transitions. [2023-12-02 18:01:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 18:01:33,127 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:33,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:33,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (6)] Ended with exit code 0 [2023-12-02 18:01:33,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:33,328 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:33,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:33,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1095268716, now seen corresponding path program 1 times [2023-12-02 18:01:33,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:33,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1099904047] [2023-12-02 18:01:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:33,329 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 18:01:33,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:33,330 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:33,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (7)] Waiting until timeout for monitored process [2023-12-02 18:01:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:33,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:01:33,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:33,418 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 18:01:33,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:33,418 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:33,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1099904047] [2023-12-02 18:01:33,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1099904047] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:33,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:33,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:01:33,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912003737] [2023-12-02 18:01:33,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:33,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:01:33,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:33,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:01:33,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:01:33,420 INFO L87 Difference]: Start difference. First operand 362 states and 468 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:34,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:34,202 INFO L93 Difference]: Finished difference Result 399 states and 492 transitions. [2023-12-02 18:01:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:01:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-12-02 18:01:34,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:34,206 INFO L225 Difference]: With dead ends: 399 [2023-12-02 18:01:34,206 INFO L226 Difference]: Without dead ends: 393 [2023-12-02 18:01:34,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:01:34,207 INFO L413 NwaCegarLoop]: 285 mSDtfsCounter, 84 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:34,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 620 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:01:34,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-12-02 18:01:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 361. [2023-12-02 18:01:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 206 states have (on average 1.9902912621359223) internal successors, (410), 329 states have internal predecessors, (410), 21 states have call successors, (21), 11 states have call predecessors, (21), 14 states have return successors, (35), 22 states have call predecessors, (35), 21 states have call successors, (35) [2023-12-02 18:01:34,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 466 transitions. [2023-12-02 18:01:34,222 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 466 transitions. Word has length 14 [2023-12-02 18:01:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:34,223 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 466 transitions. [2023-12-02 18:01:34,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 18:01:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 466 transitions. [2023-12-02 18:01:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:01:34,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:34,224 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:34,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (7)] Ended with exit code 0 [2023-12-02 18:01:34,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:34,425 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:34,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1280516602, now seen corresponding path program 1 times [2023-12-02 18:01:34,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:34,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752408042] [2023-12-02 18:01:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:01:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:34,426 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:34,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:34,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:01:34,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:34,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:34,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:34,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752408042] [2023-12-02 18:01:34,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752408042] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:34,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:34,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:01:34,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443800] [2023-12-02 18:01:34,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:34,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:34,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:34,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:34,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:34,524 INFO L87 Difference]: Start difference. First operand 361 states and 466 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:01:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:34,873 INFO L93 Difference]: Finished difference Result 301 states and 347 transitions. [2023-12-02 18:01:34,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:01:34,874 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-12-02 18:01:34,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:34,876 INFO L225 Difference]: With dead ends: 301 [2023-12-02 18:01:34,876 INFO L226 Difference]: Without dead ends: 297 [2023-12-02 18:01:34,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:34,877 INFO L413 NwaCegarLoop]: 272 mSDtfsCounter, 0 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:34,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1069 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:01:34,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-02 18:01:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 295. [2023-12-02 18:01:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 149 states have (on average 2.0201342281879193) internal successors, (301), 271 states have internal predecessors, (301), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2023-12-02 18:01:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 336 transitions. [2023-12-02 18:01:34,888 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 336 transitions. Word has length 16 [2023-12-02 18:01:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:34,888 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 336 transitions. [2023-12-02 18:01:34,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:01:34,889 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 336 transitions. [2023-12-02 18:01:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:01:34,889 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:34,889 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:34,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:35,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:35,094 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr86ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:35,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -987113595, now seen corresponding path program 1 times [2023-12-02 18:01:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1691533158] [2023-12-02 18:01:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:35,095 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 18:01:35,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:35,096 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:35,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (9)] Waiting until timeout for monitored process [2023-12-02 18:01:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:35,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:01:35,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:35,180 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:35,212 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1691533158] [2023-12-02 18:01:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1691533158] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:01:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [534252298] [2023-12-02 18:01:35,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:35,212 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:01:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:01:35,213 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:01:35,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-12-02 18:01:35,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:35,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:01:35,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:35,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:35,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:35,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [534252298] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:01:35,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849565093] [2023-12-02 18:01:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:35,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:01:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:01:35,371 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:01:35,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 18:01:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:35,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:01:35,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:35,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:35,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:35,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849565093] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:01:35,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:01:35,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2023-12-02 18:01:35,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105875914] [2023-12-02 18:01:35,486 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:01:35,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:35,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:35,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:35,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:35,487 INFO L87 Difference]: Start difference. First operand 295 states and 336 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:01:35,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:35,770 INFO L93 Difference]: Finished difference Result 294 states and 335 transitions. [2023-12-02 18:01:35,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:01:35,771 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-12-02 18:01:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:35,773 INFO L225 Difference]: With dead ends: 294 [2023-12-02 18:01:35,773 INFO L226 Difference]: Without dead ends: 294 [2023-12-02 18:01:35,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:35,774 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 220 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 843 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:35,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 843 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:01:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-12-02 18:01:35,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2023-12-02 18:01:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 149 states have (on average 2.0134228187919465) internal successors, (300), 270 states have internal predecessors, (300), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 16 states have call predecessors, (19), 16 states have call successors, (19) [2023-12-02 18:01:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 335 transitions. [2023-12-02 18:01:35,783 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 335 transitions. Word has length 16 [2023-12-02 18:01:35,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:35,784 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 335 transitions. [2023-12-02 18:01:35,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:01:35,784 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 335 transitions. [2023-12-02 18:01:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:01:35,785 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:35,785 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:35,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (9)] Ended with exit code 0 [2023-12-02 18:01:35,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (10)] Ended with exit code 0 [2023-12-02 18:01:36,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 18:01:36,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:01:36,386 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:36,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:36,387 INFO L85 PathProgramCache]: Analyzing trace with hash -987113846, now seen corresponding path program 1 times [2023-12-02 18:01:36,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:36,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [338111853] [2023-12-02 18:01:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:36,387 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 18:01:36,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:36,388 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:36,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:36,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:01:36,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:01:36,479 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:01:36,479 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:36,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [338111853] [2023-12-02 18:01:36,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [338111853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:01:36,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:01:36,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:01:36,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196793585] [2023-12-02 18:01:36,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:01:36,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:01:36,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:36,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:01:36,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:36,481 INFO L87 Difference]: Start difference. First operand 294 states and 335 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:01:36,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:36,850 INFO L93 Difference]: Finished difference Result 329 states and 378 transitions. [2023-12-02 18:01:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:01:36,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-12-02 18:01:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:36,852 INFO L225 Difference]: With dead ends: 329 [2023-12-02 18:01:36,852 INFO L226 Difference]: Without dead ends: 329 [2023-12-02 18:01:36,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:01:36,853 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 31 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:36,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 1070 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:01:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-02 18:01:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 296. [2023-12-02 18:01:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 151 states have (on average 2.0) internal successors, (302), 271 states have internal predecessors, (302), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2023-12-02 18:01:36,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 337 transitions. [2023-12-02 18:01:36,863 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 337 transitions. Word has length 16 [2023-12-02 18:01:36,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:36,863 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 337 transitions. [2023-12-02 18:01:36,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:01:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 337 transitions. [2023-12-02 18:01:36,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:01:36,864 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:36,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:36,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:37,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:37,068 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:37,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:37,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1015742997, now seen corresponding path program 1 times [2023-12-02 18:01:37,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:37,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1380758619] [2023-12-02 18:01:37,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:37,068 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 18:01:37,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:37,069 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:37,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:37,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:01:37,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:37,141 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 18:01:37,264 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:01:37,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:01:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:37,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:39,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:39,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1380758619] [2023-12-02 18:01:39,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1380758619] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:01:39,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316166396] [2023-12-02 18:01:39,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:39,757 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:01:39,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:01:39,758 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:01:39,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2023-12-02 18:01:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:39,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:01:39,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:39,914 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 18:01:39,983 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:01:39,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:01:39,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:39,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:44,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:44,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [316166396] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:01:44,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824023314] [2023-12-02 18:01:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:44,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:01:44,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:01:44,041 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:01:44,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 18:01:44,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:44,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:01:44,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:44,142 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 18:01:44,205 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:01:44,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:01:44,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:44,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:01:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824023314] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:01:48,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:01:48,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 7 [2023-12-02 18:01:48,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149463532] [2023-12-02 18:01:48,401 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:01:48,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 18:01:48,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:01:48,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 18:01:48,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:01:48,402 INFO L87 Difference]: Start difference. First operand 296 states and 337 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:01:51,326 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 [0] [2023-12-02 18:01:53,552 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 [0] [2023-12-02 18:01:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:01:54,669 INFO L93 Difference]: Finished difference Result 329 states and 371 transitions. [2023-12-02 18:01:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:01:54,670 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2023-12-02 18:01:54,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:01:54,673 INFO L225 Difference]: With dead ends: 329 [2023-12-02 18:01:54,673 INFO L226 Difference]: Without dead ends: 329 [2023-12-02 18:01:54,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:01:54,673 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 172 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 42 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:01:54,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 942 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 977 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2023-12-02 18:01:54,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-12-02 18:01:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 296. [2023-12-02 18:01:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 154 states have (on average 1.9675324675324675) internal successors, (303), 271 states have internal predecessors, (303), 16 states have call successors, (16), 9 states have call predecessors, (16), 10 states have return successors, (19), 17 states have call predecessors, (19), 16 states have call successors, (19) [2023-12-02 18:01:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 338 transitions. [2023-12-02 18:01:54,683 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 338 transitions. Word has length 16 [2023-12-02 18:01:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:01:54,683 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 338 transitions. [2023-12-02 18:01:54,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:01:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 338 transitions. [2023-12-02 18:01:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 18:01:54,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:01:54,684 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:01:54,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2023-12-02 18:01:54,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 18:01:55,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:55,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:55,291 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:01:55,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:01:55,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1015742996, now seen corresponding path program 1 times [2023-12-02 18:01:55,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:01:55,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826076244] [2023-12-02 18:01:55,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:55,292 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 18:01:55,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:01:55,293 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:55,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:01:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:55,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:01:55,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:55,365 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 18:01:55,374 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 18:01:55,516 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 18:01:55,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:01:55,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:01:55,560 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:01:55,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:01:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 18:01:55,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:01:57,809 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:01:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826076244] [2023-12-02 18:01:57,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826076244] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:01:57,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2066280588] [2023-12-02 18:01:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:01:57,809 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:01:57,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:01:57,810 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:01:57,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-12-02 18:01:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:01:57,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:01:57,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:01:57,926 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 18:01:57,934 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 18:01:58,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:01:58,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:01:58,030 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:01:58,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:01:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 18:01:58,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:00,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2066280588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:00,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673392750] [2023-12-02 18:02:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:00,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:00,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:00,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:00,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 18:02:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:00,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:02:00,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:00,462 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 18:02:00,467 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 18:02:00,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:02:00,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:02:00,565 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:02:00,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:02:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-12-02 18:02:00,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673392750] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:00,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:02:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-02 18:02:00,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669372646] [2023-12-02 18:02:00,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:02:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:02:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=69, Unknown=2, NotChecked=16, Total=110 [2023-12-02 18:02:00,742 INFO L87 Difference]: Start difference. First operand 296 states and 338 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:02:04,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:04,793 INFO L93 Difference]: Finished difference Result 602 states and 715 transitions. [2023-12-02 18:02:04,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:02:04,794 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-12-02 18:02:04,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:04,796 INFO L225 Difference]: With dead ends: 602 [2023-12-02 18:02:04,796 INFO L226 Difference]: Without dead ends: 602 [2023-12-02 18:02:04,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=31, Invalid=103, Unknown=2, NotChecked=20, Total=156 [2023-12-02 18:02:04,797 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 354 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 2467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 673 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:04,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1195 Invalid, 2467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1749 Invalid, 0 Unknown, 673 Unchecked, 3.9s Time] [2023-12-02 18:02:04,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2023-12-02 18:02:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 308. [2023-12-02 18:02:04,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 164 states have (on average 1.9329268292682926) internal successors, (317), 280 states have internal predecessors, (317), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 364 transitions. [2023-12-02 18:02:04,811 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 364 transitions. Word has length 16 [2023-12-02 18:02:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:04,812 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 364 transitions. [2023-12-02 18:02:04,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:02:04,812 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 364 transitions. [2023-12-02 18:02:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 18:02:04,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:04,813 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:04,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:05,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:05,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 18:02:05,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:05,414 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr87ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:05,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash -535749943, now seen corresponding path program 1 times [2023-12-02 18:02:05,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:05,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052934116] [2023-12-02 18:02:05,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:05,414 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 18:02:05,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:05,415 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:05,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (19)] Waiting until timeout for monitored process [2023-12-02 18:02:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:05,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:02:05,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:02:05,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:05,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:05,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:05,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052934116] [2023-12-02 18:02:05,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052934116] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:05,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [202895922] [2023-12-02 18:02:05,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:05,725 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:05,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:05,726 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:05,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2023-12-02 18:02:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:05,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:02:05,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:02:05,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:05,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [202895922] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:05,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087992708] [2023-12-02 18:02:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:05,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:05,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:05,914 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:05,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 18:02:05,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:05,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:02:05,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:02:06,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:06,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087992708] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:06,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:02:06,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 18:02:06,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783594091] [2023-12-02 18:02:06,061 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:02:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:06,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:02:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:02:06,062 INFO L87 Difference]: Start difference. First operand 308 states and 364 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 18:02:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:07,130 INFO L93 Difference]: Finished difference Result 307 states and 362 transitions. [2023-12-02 18:02:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:02:07,131 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2023-12-02 18:02:07,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:07,133 INFO L225 Difference]: With dead ends: 307 [2023-12-02 18:02:07,133 INFO L226 Difference]: Without dead ends: 307 [2023-12-02 18:02:07,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:02:07,133 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 741 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:07,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [754 Valid, 934 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 18:02:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-02 18:02:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2023-12-02 18:02:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 164 states have (on average 1.920731707317073) internal successors, (315), 279 states have internal predecessors, (315), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 362 transitions. [2023-12-02 18:02:07,140 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 362 transitions. Word has length 17 [2023-12-02 18:02:07,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:07,141 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 362 transitions. [2023-12-02 18:02:07,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 18:02:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 362 transitions. [2023-12-02 18:02:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 18:02:07,142 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:07,142 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:07,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 18:02:07,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (19)] Ended with exit code 0 [2023-12-02 18:02:07,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2023-12-02 18:02:07,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:07,744 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:07,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:07,744 INFO L85 PathProgramCache]: Analyzing trace with hash -427650934, now seen corresponding path program 1 times [2023-12-02 18:02:07,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:07,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [894904071] [2023-12-02 18:02:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:07,745 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 18:02:07,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:07,746 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:07,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Waiting until timeout for monitored process [2023-12-02 18:02:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:07,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:02:07,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:07,891 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:02:07,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:02:08,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:02:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:08,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:08,094 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [894904071] [2023-12-02 18:02:08,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [894904071] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:08,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1189953227] [2023-12-02 18:02:08,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:08,094 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:08,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:08,095 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:08,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-02 18:02:08,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:08,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:02:08,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:08,290 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:02:08,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:02:08,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:02:08,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:08,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:08,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1189953227] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:08,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101054929] [2023-12-02 18:02:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:08,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:08,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:08,465 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:08,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 18:02:08,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:08,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:02:08,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:08,630 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:02:08,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:02:08,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:02:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:08,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:08,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101054929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:08,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:02:08,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-02 18:02:08,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473838195] [2023-12-02 18:02:08,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:08,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:02:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:02:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-02 18:02:08,844 INFO L87 Difference]: Start difference. First operand 307 states and 362 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:02:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:10,672 INFO L93 Difference]: Finished difference Result 377 states and 430 transitions. [2023-12-02 18:02:10,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:02:10,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 18:02:10,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:10,675 INFO L225 Difference]: With dead ends: 377 [2023-12-02 18:02:10,675 INFO L226 Difference]: Without dead ends: 377 [2023-12-02 18:02:10,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:02:10,675 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 386 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:10,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 664 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:02:10,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2023-12-02 18:02:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 309. [2023-12-02 18:02:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 166 states have (on average 1.9156626506024097) internal successors, (318), 281 states have internal predecessors, (318), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 365 transitions. [2023-12-02 18:02:10,686 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 365 transitions. Word has length 20 [2023-12-02 18:02:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:10,687 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 365 transitions. [2023-12-02 18:02:10,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:02:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 365 transitions. [2023-12-02 18:02:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 18:02:10,688 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:10,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:10,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2023-12-02 18:02:10,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-12-02 18:02:11,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Ended with exit code 0 [2023-12-02 18:02:11,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:11,289 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr90REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash -427650933, now seen corresponding path program 1 times [2023-12-02 18:02:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:11,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990038059] [2023-12-02 18:02:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:11,290 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 18:02:11,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:11,290 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:11,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Waiting until timeout for monitored process [2023-12-02 18:02:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:11,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:02:11,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:11,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:02:11,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:02:11,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:02:11,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:12,006 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990038059] [2023-12-02 18:02:12,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990038059] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [433822649] [2023-12-02 18:02:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:12,006 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:12,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:12,007 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:12,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2023-12-02 18:02:12,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:12,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:02:12,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:12,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:02:12,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:02:12,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:02:12,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:12,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [433822649] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:12,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943483442] [2023-12-02 18:02:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:12,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:12,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:12,600 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:12,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-02 18:02:12,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:12,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:02:12,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:12,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:02:12,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:02:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 18:02:12,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:15,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943483442] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:15,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:02:15,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-12-02 18:02:15,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683241611] [2023-12-02 18:02:15,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:15,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:02:15,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:15,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:02:15,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:02:15,348 INFO L87 Difference]: Start difference. First operand 309 states and 365 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:02:17,771 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 [0] [2023-12-02 18:02:19,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:02:21,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:02:24,561 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:02:26,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:02:29,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:02:31,904 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:02:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:31,910 INFO L93 Difference]: Finished difference Result 372 states and 425 transitions. [2023-12-02 18:02:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:02:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-12-02 18:02:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:31,913 INFO L225 Difference]: With dead ends: 372 [2023-12-02 18:02:31,913 INFO L226 Difference]: Without dead ends: 372 [2023-12-02 18:02:31,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:02:31,914 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 469 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 65 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:31,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 362 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 631 Invalid, 7 Unknown, 0 Unchecked, 16.4s Time] [2023-12-02 18:02:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2023-12-02 18:02:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 308. [2023-12-02 18:02:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 166 states have (on average 1.9036144578313252) internal successors, (316), 280 states have internal predecessors, (316), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 363 transitions. [2023-12-02 18:02:31,924 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 363 transitions. Word has length 20 [2023-12-02 18:02:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:31,925 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 363 transitions. [2023-12-02 18:02:31,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-02 18:02:31,925 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 363 transitions. [2023-12-02 18:02:31,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:02:31,926 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:31,926 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:31,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:32,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Ended with exit code 0 [2023-12-02 18:02:32,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:32,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:32,527 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:32,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:32,527 INFO L85 PathProgramCache]: Analyzing trace with hash -372273308, now seen corresponding path program 1 times [2023-12-02 18:02:32,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:32,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1720550412] [2023-12-02 18:02:32,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:32,527 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 18:02:32,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:32,528 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:32,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (28)] Waiting until timeout for monitored process [2023-12-02 18:02:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:32,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:02:32,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:32,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 18:02:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:02:32,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:02:32,641 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:32,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1720550412] [2023-12-02 18:02:32,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1720550412] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:32,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:32,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:02:32,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139946108] [2023-12-02 18:02:32,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:32,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:02:32,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:32,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:02:32,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:02:32,642 INFO L87 Difference]: Start difference. First operand 308 states and 363 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:02:33,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:33,238 INFO L93 Difference]: Finished difference Result 338 states and 396 transitions. [2023-12-02 18:02:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:02:33,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-12-02 18:02:33,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:33,242 INFO L225 Difference]: With dead ends: 338 [2023-12-02 18:02:33,242 INFO L226 Difference]: Without dead ends: 338 [2023-12-02 18:02:33,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 18:02:33,243 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 43 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:33,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 669 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:02:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-12-02 18:02:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 309. [2023-12-02 18:02:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 167 states have (on average 1.904191616766467) internal successors, (318), 281 states have internal predecessors, (318), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 365 transitions. [2023-12-02 18:02:33,253 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 365 transitions. Word has length 21 [2023-12-02 18:02:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:33,253 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 365 transitions. [2023-12-02 18:02:33,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:02:33,254 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 365 transitions. [2023-12-02 18:02:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-02 18:02:33,254 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:33,254 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:33,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (28)] Ended with exit code 0 [2023-12-02 18:02:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:33,455 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:33,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -372273307, now seen corresponding path program 1 times [2023-12-02 18:02:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:33,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562208136] [2023-12-02 18:02:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:33,456 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 18:02:33,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:33,457 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:33,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:33,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:02:33,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:33,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-02 18:02:33,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:02:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:02:33,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:02:33,732 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:33,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562208136] [2023-12-02 18:02:33,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562208136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:33,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:33,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 18:02:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590661200] [2023-12-02 18:02:33,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:02:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:02:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:02:33,734 INFO L87 Difference]: Start difference. First operand 309 states and 365 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:02:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:34,541 INFO L93 Difference]: Finished difference Result 327 states and 384 transitions. [2023-12-02 18:02:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:02:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-12-02 18:02:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:34,543 INFO L225 Difference]: With dead ends: 327 [2023-12-02 18:02:34,543 INFO L226 Difference]: Without dead ends: 327 [2023-12-02 18:02:34,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 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 18:02:34,544 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 30 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:34,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 686 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:02:34,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2023-12-02 18:02:34,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 309. [2023-12-02 18:02:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 167 states have (on average 1.8982035928143712) internal successors, (317), 281 states have internal predecessors, (317), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 364 transitions. [2023-12-02 18:02:34,554 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 364 transitions. Word has length 21 [2023-12-02 18:02:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:34,554 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 364 transitions. [2023-12-02 18:02:34,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:02:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 364 transitions. [2023-12-02 18:02:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-12-02 18:02:34,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:34,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:34,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Ended with exit code 0 [2023-12-02 18:02:34,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:34,755 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:34,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:34,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1272249073, now seen corresponding path program 1 times [2023-12-02 18:02:34,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:34,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654908935] [2023-12-02 18:02:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:34,756 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 18:02:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:34,757 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:34,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (30)] Waiting until timeout for monitored process [2023-12-02 18:02:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:34,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:02:34,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:02:35,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:02:35,059 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:35,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654908935] [2023-12-02 18:02:35,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654908935] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:35,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:35,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:02:35,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874238052] [2023-12-02 18:02:35,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:35,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:02:35,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:02:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:02:35,060 INFO L87 Difference]: Start difference. First operand 309 states and 364 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:02:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:35,606 INFO L93 Difference]: Finished difference Result 313 states and 367 transitions. [2023-12-02 18:02:35,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:02:35,607 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2023-12-02 18:02:35,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:35,608 INFO L225 Difference]: With dead ends: 313 [2023-12-02 18:02:35,608 INFO L226 Difference]: Without dead ends: 313 [2023-12-02 18:02:35,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 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 18:02:35,609 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 7 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:35,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 751 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 18:02:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-12-02 18:02:35,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 310. [2023-12-02 18:02:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 168 states have (on average 1.8928571428571428) internal successors, (318), 282 states have internal predecessors, (318), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:35,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 365 transitions. [2023-12-02 18:02:35,618 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 365 transitions. Word has length 23 [2023-12-02 18:02:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:35,619 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 365 transitions. [2023-12-02 18:02:35,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:02:35,619 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 365 transitions. [2023-12-02 18:02:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:02:35,620 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:35,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:35,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (30)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:35,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:35,822 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr83ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:35,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:35,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1342396467, now seen corresponding path program 1 times [2023-12-02 18:02:35,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:35,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [257567453] [2023-12-02 18:02:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:35,823 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 18:02:35,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:35,824 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:35,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (31)] Waiting until timeout for monitored process [2023-12-02 18:02:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:35,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:02:35,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:35,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:35,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:35,936 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:35,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [257567453] [2023-12-02 18:02:35,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [257567453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:35,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [63350003] [2023-12-02 18:02:35,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:35,936 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:35,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:35,937 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:35,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2023-12-02 18:02:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:36,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:02:36,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:36,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:36,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:36,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [63350003] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:36,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262771726] [2023-12-02 18:02:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:36,089 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:36,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-12-02 18:02:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:36,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:02:36,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:36,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:36,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:36,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262771726] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:36,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:02:36,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2023-12-02 18:02:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394612960] [2023-12-02 18:02:36,228 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:36,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:02:36,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:02:36,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:02:36,229 INFO L87 Difference]: Start difference. First operand 310 states and 365 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:02:36,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:36,518 INFO L93 Difference]: Finished difference Result 309 states and 364 transitions. [2023-12-02 18:02:36,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:02:36,519 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-12-02 18:02:36,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:36,521 INFO L225 Difference]: With dead ends: 309 [2023-12-02 18:02:36,521 INFO L226 Difference]: Without dead ends: 309 [2023-12-02 18:02:36,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:02:36,522 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 210 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 834 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:36,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 834 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:02:36,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-12-02 18:02:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 309. [2023-12-02 18:02:36,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 168 states have (on average 1.8869047619047619) internal successors, (317), 281 states have internal predecessors, (317), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (29), 20 states have call predecessors, (29), 18 states have call successors, (29) [2023-12-02 18:02:36,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 364 transitions. [2023-12-02 18:02:36,528 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 364 transitions. Word has length 24 [2023-12-02 18:02:36,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:36,528 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 364 transitions. [2023-12-02 18:02:36,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:02:36,528 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 364 transitions. [2023-12-02 18:02:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:02:36,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:36,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:36,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2023-12-02 18:02:36,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:36,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (31)] Ended with exit code 0 [2023-12-02 18:02:37,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:37,130 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:37,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:37,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1342396233, now seen corresponding path program 1 times [2023-12-02 18:02:37,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:37,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1469366307] [2023-12-02 18:02:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:37,131 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 18:02:37,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:37,131 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:37,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (34)] Waiting until timeout for monitored process [2023-12-02 18:02:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:37,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:02:37,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:02:37,239 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:02:37,239 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:37,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1469366307] [2023-12-02 18:02:37,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1469366307] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:02:37,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:02:37,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:02:37,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298416884] [2023-12-02 18:02:37,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:02:37,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:02:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:37,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:02:37,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:02:37,241 INFO L87 Difference]: Start difference. First operand 309 states and 364 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:02:37,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:37,618 INFO L93 Difference]: Finished difference Result 341 states and 394 transitions. [2023-12-02 18:02:37,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:02:37,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2023-12-02 18:02:37,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:37,621 INFO L225 Difference]: With dead ends: 341 [2023-12-02 18:02:37,622 INFO L226 Difference]: Without dead ends: 341 [2023-12-02 18:02:37,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:02:37,622 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 34 mSDsluCounter, 791 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1060 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:37,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1060 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:02:37,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2023-12-02 18:02:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 307. [2023-12-02 18:02:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 167 states have (on average 1.874251497005988) internal successors, (313), 279 states have internal predecessors, (313), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2023-12-02 18:02:37,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 357 transitions. [2023-12-02 18:02:37,631 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 357 transitions. Word has length 24 [2023-12-02 18:02:37,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:37,631 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 357 transitions. [2023-12-02 18:02:37,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:02:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 357 transitions. [2023-12-02 18:02:37,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:02:37,632 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:37,632 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:37,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (34)] Ended with exit code 0 [2023-12-02 18:02:37,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:37,834 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:37,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1313767082, now seen corresponding path program 1 times [2023-12-02 18:02:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [416178210] [2023-12-02 18:02:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:37,835 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 18:02:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:37,836 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:37,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:37,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:37,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:02:37,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:37,925 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 18:02:37,968 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-12-02 18:02:37,986 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 18:02:37,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 18:02:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 18:02:38,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:38,145 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:38,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [416178210] [2023-12-02 18:02:38,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [416178210] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:38,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1670928986] [2023-12-02 18:02:38,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:38,146 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:38,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:38,147 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:38,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2023-12-02 18:02:38,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:38,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:02:38,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:38,303 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 18:02:38,343 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 18:02:38,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-12-02 18:02:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-12-02 18:02:38,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1670928986] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:38,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416923090] [2023-12-02 18:02:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:38,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:38,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:38,500 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:38,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-12-02 18:02:38,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:38,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 18:02:38,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:38,601 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 18:02:38,673 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:02:38,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:02:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:38,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:38,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416923090] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:02:38,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:02:38,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2023-12-02 18:02:38,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203602187] [2023-12-02 18:02:38,796 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:38,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-02 18:02:38,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:38,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-02 18:02:38,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-12-02 18:02:38,797 INFO L87 Difference]: Start difference. First operand 307 states and 357 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:02:41,782 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 [0] [2023-12-02 18:02:43,910 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 [0] [2023-12-02 18:02:44,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:44,909 INFO L93 Difference]: Finished difference Result 337 states and 383 transitions. [2023-12-02 18:02:44,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:02:44,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-12-02 18:02:44,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:44,911 INFO L225 Difference]: With dead ends: 337 [2023-12-02 18:02:44,911 INFO L226 Difference]: Without dead ends: 337 [2023-12-02 18:02:44,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2023-12-02 18:02:44,912 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 164 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 38 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 954 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:44,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 954 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 969 Invalid, 2 Unknown, 345 Unchecked, 6.1s Time] [2023-12-02 18:02:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-12-02 18:02:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 309. [2023-12-02 18:02:44,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 170 states have (on average 1.8588235294117648) internal successors, (316), 281 states have internal predecessors, (316), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2023-12-02 18:02:44,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 360 transitions. [2023-12-02 18:02:44,918 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 360 transitions. Word has length 24 [2023-12-02 18:02:44,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:44,918 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 360 transitions. [2023-12-02 18:02:44,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:02:44,918 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 360 transitions. [2023-12-02 18:02:44,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:02:44,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:44,919 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:44,921 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:45,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:45,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2023-12-02 18:02:45,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:45,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:45,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1313767083, now seen corresponding path program 1 times [2023-12-02 18:02:45,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:45,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89903214] [2023-12-02 18:02:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:45,520 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 18:02:45,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:45,521 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:45,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:45,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:02:45,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:45,610 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 18:02:45,708 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2023-12-02 18:02:45,730 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-02 18:02:45,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-02 18:02:45,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 18:02:45,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:45,973 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:45,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89903214] [2023-12-02 18:02:45,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89903214] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:45,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [237565981] [2023-12-02 18:02:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:45,973 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:45,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:45,974 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:45,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 18:02:46,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:46,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:02:46,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:46,141 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 18:02:46,146 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 18:02:46,306 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 18:02:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:02:46,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:02:46,335 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:02:46,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:02:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 18:02:46,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:50,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [237565981] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:50,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403341901] [2023-12-02 18:02:50,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:50,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:02:50,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:02:50,535 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:02:50,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-12-02 18:02:50,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:50,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 18:02:50,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:50,639 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 18:02:50,647 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 18:02:50,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:02:50,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:02:50,737 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:02:50,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:02:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-12-02 18:02:50,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:50,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403341901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:50,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:02:50,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-12-02 18:02:50,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76064392] [2023-12-02 18:02:50,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:02:50,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:02:50,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:02:50,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:02:50,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=171, Unknown=4, NotChecked=54, Total=272 [2023-12-02 18:02:50,973 INFO L87 Difference]: Start difference. First operand 309 states and 360 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 18:02:55,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:02:55,418 INFO L93 Difference]: Finished difference Result 595 states and 704 transitions. [2023-12-02 18:02:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:02:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2023-12-02 18:02:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:02:55,422 INFO L225 Difference]: With dead ends: 595 [2023-12-02 18:02:55,422 INFO L226 Difference]: Without dead ends: 595 [2023-12-02 18:02:55,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=54, Invalid=222, Unknown=4, NotChecked=62, Total=342 [2023-12-02 18:02:55,423 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 352 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1575 SdHoareTripleChecker+Invalid, 3499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1294 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:02:55,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1575 Invalid, 3499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 2166 Invalid, 0 Unknown, 1294 Unchecked, 4.3s Time] [2023-12-02 18:02:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2023-12-02 18:02:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 308. [2023-12-02 18:02:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 170 states have (on average 1.8529411764705883) internal successors, (315), 280 states have internal predecessors, (315), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (27), 20 states have call predecessors, (27), 17 states have call successors, (27) [2023-12-02 18:02:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 359 transitions. [2023-12-02 18:02:55,435 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 359 transitions. Word has length 24 [2023-12-02 18:02:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:02:55,435 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 359 transitions. [2023-12-02 18:02:55,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 18:02:55,436 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 359 transitions. [2023-12-02 18:02:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:02:55,436 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:02:55,436 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:02:55,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:55,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-12-02 18:02:55,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2023-12-02 18:02:56,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:56,038 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:02:56,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:02:56,038 INFO L85 PathProgramCache]: Analyzing trace with hash -785014868, now seen corresponding path program 1 times [2023-12-02 18:02:56,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:02:56,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442806676] [2023-12-02 18:02:56,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:56,038 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 18:02:56,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:02:56,039 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:56,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:02:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:56,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:02:56,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:56,210 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)))) is different from true [2023-12-02 18:02:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:56,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:56,321 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 18:02:56,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-12-02 18:02:58,450 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:02:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442806676] [2023-12-02 18:02:58,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442806676] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:02:58,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501817811] [2023-12-02 18:02:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:02:58,451 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:02:58,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:02:58,451 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:02:58,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2023-12-02 18:02:58,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:02:58,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 18:02:58,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:02:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:02:58,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:02:58,891 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 18:02:58,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-12-02 18:03:03,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501817811] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:03:03,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375911876] [2023-12-02 18:03:03,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:03,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:03:03,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:03:03,098 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:03:03,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-12-02 18:03:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:03,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:03:03,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:03,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:03,325 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-12-02 18:03:03,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-12-02 18:03:05,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375911876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:03:05,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:03:05,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 9 [2023-12-02 18:03:05,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163391214] [2023-12-02 18:03:05,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:03:05,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:03:05,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:03:05,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:03:05,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=86, Unknown=2, NotChecked=18, Total=132 [2023-12-02 18:03:05,429 INFO L87 Difference]: Start difference. First operand 308 states and 359 transitions. Second operand has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:03:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:07,166 INFO L93 Difference]: Finished difference Result 317 states and 367 transitions. [2023-12-02 18:03:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:03:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2023-12-02 18:03:07,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:07,169 INFO L225 Difference]: With dead ends: 317 [2023-12-02 18:03:07,169 INFO L226 Difference]: Without dead ends: 304 [2023-12-02 18:03:07,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 107 SyntacticMatches, 10 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=33, Invalid=101, Unknown=2, NotChecked=20, Total=156 [2023-12-02 18:03:07,169 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 45 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:07,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 956 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 807 Invalid, 0 Unknown, 311 Unchecked, 1.7s Time] [2023-12-02 18:03:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-12-02 18:03:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 302. [2023-12-02 18:03:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 165 states have (on average 1.8727272727272728) internal successors, (309), 276 states have internal predecessors, (309), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 18:03:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 352 transitions. [2023-12-02 18:03:07,175 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 352 transitions. Word has length 24 [2023-12-02 18:03:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:07,176 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 352 transitions. [2023-12-02 18:03:07,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-02 18:03:07,176 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 352 transitions. [2023-12-02 18:03:07,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 18:03:07,176 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:07,176 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:07,178 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:07,379 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2023-12-02 18:03:07,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-12-02 18:03:07,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:03:07,777 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:03:07,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:07,778 INFO L85 PathProgramCache]: Analyzing trace with hash -279456243, now seen corresponding path program 1 times [2023-12-02 18:03:07,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:03:07,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564567245] [2023-12-02 18:03:07,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:07,778 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:03:07,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:03:07,779 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:07,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:07,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:03:07,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:07,866 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:03:07,866 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:03:07,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564567245] [2023-12-02 18:03:07,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564567245] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:03:07,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:03:07,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:03:07,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297734219] [2023-12-02 18:03:07,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:03:07,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:03:07,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:03:07,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:03:07,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:03:07,868 INFO L87 Difference]: Start difference. First operand 302 states and 352 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:03:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:08,160 INFO L93 Difference]: Finished difference Result 295 states and 344 transitions. [2023-12-02 18:03:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:03:08,161 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-12-02 18:03:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:08,162 INFO L225 Difference]: With dead ends: 295 [2023-12-02 18:03:08,162 INFO L226 Difference]: Without dead ends: 295 [2023-12-02 18:03:08,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:03:08,163 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 211 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:08,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 841 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:03:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-12-02 18:03:08,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-12-02 18:03:08,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 158 states have (on average 1.9050632911392404) internal successors, (301), 269 states have internal predecessors, (301), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 18:03:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 344 transitions. [2023-12-02 18:03:08,169 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 344 transitions. Word has length 24 [2023-12-02 18:03:08,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:08,169 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 344 transitions. [2023-12-02 18:03:08,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 18:03:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 344 transitions. [2023-12-02 18:03:08,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 18:03:08,170 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:08,170 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:08,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:08,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:08,370 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr84ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:03:08,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:08,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1335382060, now seen corresponding path program 1 times [2023-12-02 18:03:08,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:03:08,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1936341281] [2023-12-02 18:03:08,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:08,371 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 18:03:08,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:03:08,372 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:08,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Waiting until timeout for monitored process [2023-12-02 18:03:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:08,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:03:08,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:08,831 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:03:08,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:08,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:03:08,937 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:03:08,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1936341281] [2023-12-02 18:03:08,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1936341281] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:03:08,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [141019720] [2023-12-02 18:03:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:08,938 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:03:08,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:03:08,939 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:03:08,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2023-12-02 18:03:09,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:09,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:03:09,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:09,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:09,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:09,166 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:03:09,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [141019720] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:03:09,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071559930] [2023-12-02 18:03:09,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:09,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:03:09,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:03:09,168 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:03:09,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-12-02 18:03:09,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:09,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:03:09,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:09,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:09,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:09,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:03:09,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071559930] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:03:09,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:03:09,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 18:03:09,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299989932] [2023-12-02 18:03:09,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:03:09,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:03:09,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:03:09,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:03:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:03:09,339 INFO L87 Difference]: Start difference. First operand 295 states and 344 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:03:10,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:10,519 INFO L93 Difference]: Finished difference Result 296 states and 344 transitions. [2023-12-02 18:03:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:03:10,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 25 [2023-12-02 18:03:10,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:10,522 INFO L225 Difference]: With dead ends: 296 [2023-12-02 18:03:10,522 INFO L226 Difference]: Without dead ends: 296 [2023-12-02 18:03:10,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:03:10,523 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 707 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 895 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:10,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 895 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 18:03:10,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-12-02 18:03:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 294. [2023-12-02 18:03:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 158 states have (on average 1.8924050632911393) internal successors, (299), 268 states have internal predecessors, (299), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 18:03:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 342 transitions. [2023-12-02 18:03:10,528 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 342 transitions. Word has length 25 [2023-12-02 18:03:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:10,528 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 342 transitions. [2023-12-02 18:03:10,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-02 18:03:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 342 transitions. [2023-12-02 18:03:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 18:03:10,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:10,529 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:10,531 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2023-12-02 18:03:10,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-12-02 18:03:10,933 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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)] Ended with exit code 0 [2023-12-02 18:03:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:11,130 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:03:11,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash -747940871, now seen corresponding path program 1 times [2023-12-02 18:03:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:03:11,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1900668162] [2023-12-02 18:03:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:11,131 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 18:03:11,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:03:11,132 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:11,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (48)] Waiting until timeout for monitored process [2023-12-02 18:03:11,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:11,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:03:11,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:11,209 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 18:03:11,284 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:11,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:11,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:11,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:11,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:11,637 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:03:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1900668162] [2023-12-02 18:03:11,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1900668162] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:03:11,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1205119231] [2023-12-02 18:03:11,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:11,637 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:03:11,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:03:11,638 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:03:11,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2023-12-02 18:03:11,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:11,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:03:11,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:11,812 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 18:03:11,856 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:03:11,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:03:11,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:11,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:11,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:12,060 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 8 treesize of output 6 [2023-12-02 18:03:12,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:12,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1205119231] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:03:12,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421294105] [2023-12-02 18:03:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:12,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:03:12,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:03:12,157 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:03:12,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-12-02 18:03:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:12,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:03:12,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:12,254 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 18:03:12,288 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:03:12,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:03:12,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:12,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:12,473 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 8 treesize of output 6 [2023-12-02 18:03:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:03:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421294105] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:03:12,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:03:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9, 9, 9, 9] total 15 [2023-12-02 18:03:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578045436] [2023-12-02 18:03:12,579 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:03:12,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 18:03:12,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:03:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 18:03:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:03:12,580 INFO L87 Difference]: Start difference. First operand 294 states and 342 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:03:15,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:03:15,144 INFO L93 Difference]: Finished difference Result 340 states and 387 transitions. [2023-12-02 18:03:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:03:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2023-12-02 18:03:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:03:15,147 INFO L225 Difference]: With dead ends: 340 [2023-12-02 18:03:15,147 INFO L226 Difference]: Without dead ends: 340 [2023-12-02 18:03:15,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-12-02 18:03:15,148 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 555 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1063 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:03:15,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1063 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 18:03:15,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-12-02 18:03:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 297. [2023-12-02 18:03:15,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 161 states have (on average 1.875776397515528) internal successors, (302), 271 states have internal predecessors, (302), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 18:03:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 345 transitions. [2023-12-02 18:03:15,154 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 345 transitions. Word has length 29 [2023-12-02 18:03:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:03:15,154 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 345 transitions. [2023-12-02 18:03:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 3 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-02 18:03:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 345 transitions. [2023-12-02 18:03:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-02 18:03:15,155 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:03:15,155 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:03:15,158 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2023-12-02 18:03:15,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-12-02 18:03:15,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (48)] Ended with exit code 0 [2023-12-02 18:03:15,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:15,756 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:03:15,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:03:15,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1511624708, now seen corresponding path program 1 times [2023-12-02 18:03:15,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:03:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2133140675] [2023-12-02 18:03:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:15,757 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 18:03:15,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:03:15,758 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:03:15,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (51)] Waiting until timeout for monitored process [2023-12-02 18:03:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:15,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 18:03:15,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:15,894 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:15,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:15,989 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:15,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:16,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:16,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:03:16,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:16,232 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:03:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2133140675] [2023-12-02 18:03:16,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2133140675] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:03:16,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [889465556] [2023-12-02 18:03:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:16,232 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:03:16,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:03:16,233 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:03:16,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Waiting until timeout for monitored process [2023-12-02 18:03:16,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:16,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 18:03:16,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:16,468 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:16,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:16,568 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:16,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:16,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-12-02 18:03:16,920 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-12-02 18:03:16,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2023-12-02 18:03:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:03:16,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:17,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [889465556] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:03:17,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765958233] [2023-12-02 18:03:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:03:17,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:03:17,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:03:17,187 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:03:17,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-12-02 18:03:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:03:17,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 18:03:17,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:03:17,356 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:17,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:17,434 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:03:17,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:03:17,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:17,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:03:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:03:17,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:03:17,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765958233] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:03:17,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:03:17,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 7] total 13 [2023-12-02 18:03:17,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436484369] [2023-12-02 18:03:17,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:03:17,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-02 18:03:17,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:03:17,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-02 18:03:17,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-12-02 18:03:17,743 INFO L87 Difference]: Start difference. First operand 297 states and 345 transitions. Second operand has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:03:21,827 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 [0] [2023-12-02 18:03:23,834 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:25,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:27,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:29,933 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:31,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:33,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:35,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:38,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:40,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:42,862 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:44,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:47,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:49,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:51,329 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:53,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:55,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:57,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:03:59,391 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:01,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:03,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:05,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:07,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:10,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:12,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:14,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:16,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:18,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:20,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:22,826 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:24,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:26,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:29,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:31,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:33,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:35,669 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:37,704 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:39,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:41,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:41,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:04:41,829 INFO L93 Difference]: Finished difference Result 369 states and 417 transitions. [2023-12-02 18:04:41,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 18:04:41,830 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 31 [2023-12-02 18:04:41,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:04:41,831 INFO L225 Difference]: With dead ends: 369 [2023-12-02 18:04:41,831 INFO L226 Difference]: Without dead ends: 369 [2023-12-02 18:04:41,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=162, Invalid=487, Unknown=1, NotChecked=0, Total=650 [2023-12-02 18:04:41,832 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 309 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 112 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:04:41,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 1059 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1294 Invalid, 39 Unknown, 0 Unchecked, 81.9s Time] [2023-12-02 18:04:41,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2023-12-02 18:04:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 299. [2023-12-02 18:04:41,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 163 states have (on average 1.8650306748466257) internal successors, (304), 273 states have internal predecessors, (304), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 18:04:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 347 transitions. [2023-12-02 18:04:41,839 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 347 transitions. Word has length 31 [2023-12-02 18:04:41,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:04:41,839 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 347 transitions. [2023-12-02 18:04:41,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 11 states have internal predecessors, (35), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 18:04:41,839 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 347 transitions. [2023-12-02 18:04:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:04:41,839 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:04:41,839 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:04:41,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-12-02 18:04:42,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (52)] Forceful destruction successful, exit code 0 [2023-12-02 18:04:42,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (51)] Forceful destruction successful, exit code 0 [2023-12-02 18:04:42,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:04:42,440 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr80ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:04:42,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:04:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1741745369, now seen corresponding path program 1 times [2023-12-02 18:04:42,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:04:42,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660589899] [2023-12-02 18:04:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:42,441 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 18:04:42,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:04:42,442 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:04:42,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (54)] Waiting until timeout for monitored process [2023-12-02 18:04:42,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:42,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:04:42,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:04:42,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:04:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:04:42,595 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:04:42,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660589899] [2023-12-02 18:04:42,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660589899] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:04:42,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1528750924] [2023-12-02 18:04:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:42,595 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:04:42,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:04:42,596 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:04:42,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2023-12-02 18:04:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:42,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:04:42,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:04:42,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:04:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:04:42,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1528750924] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:04:42,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606529179] [2023-12-02 18:04:42,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:42,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:04:42,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:04:42,814 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:04:42,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-02 18:04:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:42,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:04:42,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:42,949 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:04:42,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:04:42,982 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:04:42,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606529179] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:04:42,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:04:42,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2023-12-02 18:04:42,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865221055] [2023-12-02 18:04:42,982 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:04:42,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:04:42,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:04:42,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:04:42,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:04:42,983 INFO L87 Difference]: Start difference. First operand 299 states and 347 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:04:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:04:43,324 INFO L93 Difference]: Finished difference Result 298 states and 346 transitions. [2023-12-02 18:04:43,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:04:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 32 [2023-12-02 18:04:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:04:43,327 INFO L225 Difference]: With dead ends: 298 [2023-12-02 18:04:43,327 INFO L226 Difference]: Without dead ends: 298 [2023-12-02 18:04:43,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:04:43,328 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 202 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:04:43,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 829 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 18:04:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2023-12-02 18:04:43,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2023-12-02 18:04:43,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 163 states have (on average 1.8588957055214723) internal successors, (303), 272 states have internal predecessors, (303), 17 states have call successors, (17), 8 states have call predecessors, (17), 10 states have return successors, (26), 19 states have call predecessors, (26), 17 states have call successors, (26) [2023-12-02 18:04:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 346 transitions. [2023-12-02 18:04:43,335 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 346 transitions. Word has length 32 [2023-12-02 18:04:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:04:43,335 INFO L495 AbstractCegarLoop]: Abstraction has 298 states and 346 transitions. [2023-12-02 18:04:43,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-02 18:04:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 346 transitions. [2023-12-02 18:04:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:04:43,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:04:43,335 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:04:43,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Ended with exit code 0 [2023-12-02 18:04:43,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-12-02 18:04:43,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (54)] Forceful destruction successful, exit code 0 [2023-12-02 18:04:43,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:04:43,936 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:04:43,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:04:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1770374736, now seen corresponding path program 1 times [2023-12-02 18:04:43,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:04:43,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1201175615] [2023-12-02 18:04:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:43,937 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:04:43,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:04:43,939 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:04:43,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (57)] Waiting until timeout for monitored process [2023-12-02 18:04:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:44,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 18:04:44,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:44,099 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 18:04:44,106 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 18:04:44,240 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (select |c_#valid| |ldv_malloc_#res.base|)) |c_#valid|) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 18:04:44,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:44,267 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:44,300 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:04:44,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:04:44,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:44,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:44,481 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:04:44,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:04:44,651 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-12-02 18:04:44,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:44,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:44,717 INFO L349 Elim1Store]: treesize reduction 12, result has 42.9 percent of original size [2023-12-02 18:04:44,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-12-02 18:04:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2023-12-02 18:04:44,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:04:45,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:04:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1201175615] [2023-12-02 18:04:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1201175615] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:04:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1117620927] [2023-12-02 18:04:45,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:45,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:04:45,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:04:45,070 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:04:45,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (58)] Waiting until timeout for monitored process [2023-12-02 18:04:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:45,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 18:04:45,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:45,284 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 18:04:45,293 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 18:04:45,412 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:04:45,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:04:45,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:45,573 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:04:45,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:04:45,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:45,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:45,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:45,664 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:04:45,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:04:45,679 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 10 not checked. [2023-12-02 18:04:45,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:04:45,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1117620927] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:04:45,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859832101] [2023-12-02 18:04:45,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:04:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:04:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:04:45,928 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:04:45,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-12-02 18:04:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:04:46,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 18:04:46,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:04:46,090 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 18:04:46,099 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 18:04:46,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:46,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:46,208 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:04:46,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:04:46,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:46,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:46,316 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:04:46,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:04:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:04:46,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:04:46,413 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:04:46,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:04:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 10 not checked. [2023-12-02 18:04:46,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:04:48,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859832101] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:04:48,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:04:48,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 13 [2023-12-02 18:04:48,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455350831] [2023-12-02 18:04:48,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:04:48,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:04:48,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:04:48,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:04:48,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=149, Unknown=2, NotChecked=50, Total=240 [2023-12-02 18:04:48,661 INFO L87 Difference]: Start difference. First operand 298 states and 346 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 18:04:50,893 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 [0] [2023-12-02 18:04:53,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:55,570 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:04:57,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:00,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:02,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:04,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:06,553 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:10,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:12,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:15,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:05:19,624 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 [0] [2023-12-02 18:05:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:19,864 INFO L93 Difference]: Finished difference Result 319 states and 363 transitions. [2023-12-02 18:05:19,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 18:05:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 32 [2023-12-02 18:05:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:19,867 INFO L225 Difference]: With dead ends: 319 [2023-12-02 18:05:19,867 INFO L226 Difference]: Without dead ends: 319 [2023-12-02 18:05:19,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=57, Invalid=221, Unknown=2, NotChecked=62, Total=342 [2023-12-02 18:05:19,867 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 505 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 70 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 31.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:19,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 817 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1602 Invalid, 11 Unknown, 662 Unchecked, 31.0s Time] [2023-12-02 18:05:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-12-02 18:05:19,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 289. [2023-12-02 18:05:19,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 157 states have (on average 1.8662420382165605) internal successors, (293), 265 states have internal predecessors, (293), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:19,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2023-12-02 18:05:19,874 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 32 [2023-12-02 18:05:19,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:19,874 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2023-12-02 18:05:19,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2023-12-02 18:05:19,875 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2023-12-02 18:05:19,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:05:19,875 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:19,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:19,878 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (57)] Ended with exit code 0 [2023-12-02 18:05:20,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (58)] Forceful destruction successful, exit code 0 [2023-12-02 18:05:20,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-12-02 18:05:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:20,476 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr91REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:20,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash 384278066, now seen corresponding path program 1 times [2023-12-02 18:05:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [999543345] [2023-12-02 18:05:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:20,477 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 18:05:20,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:20,478 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (60)] Waiting until timeout for monitored process [2023-12-02 18:05:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:20,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:05:20,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:20,985 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:05:20,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:05:21,006 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 5 treesize of output 3 [2023-12-02 18:05:21,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:05:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:21,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:21,648 INFO L349 Elim1Store]: treesize reduction 7, result has 50.0 percent of original size [2023-12-02 18:05:21,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 31 [2023-12-02 18:05:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:05:22,053 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:22,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [999543345] [2023-12-02 18:05:22,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [999543345] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:22,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:05:22,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-12-02 18:05:22,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717611941] [2023-12-02 18:05:22,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:22,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:05:22,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:05:22,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:05:22,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:05:22,055 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:05:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:24,105 INFO L93 Difference]: Finished difference Result 319 states and 366 transitions. [2023-12-02 18:05:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:05:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-12-02 18:05:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:24,109 INFO L225 Difference]: With dead ends: 319 [2023-12-02 18:05:24,109 INFO L226 Difference]: Without dead ends: 319 [2023-12-02 18:05:24,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:05:24,109 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 76 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1012 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:24,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1012 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 18:05:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-12-02 18:05:24,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 290. [2023-12-02 18:05:24,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 158 states have (on average 1.8670886075949367) internal successors, (295), 266 states have internal predecessors, (295), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:24,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 335 transitions. [2023-12-02 18:05:24,115 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 335 transitions. Word has length 32 [2023-12-02 18:05:24,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:24,115 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 335 transitions. [2023-12-02 18:05:24,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:05:24,116 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 335 transitions. [2023-12-02 18:05:24,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 18:05:24,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:24,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:24,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (60)] Ended with exit code 0 [2023-12-02 18:05:24,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:24,317 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr92REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:24,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 384278067, now seen corresponding path program 1 times [2023-12-02 18:05:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630374624] [2023-12-02 18:05:24,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:24,318 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 18:05:24,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:24,319 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:24,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (61)] Waiting until timeout for monitored process [2023-12-02 18:05:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:24,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 18:05:24,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:24,981 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:05:24,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:05:25,046 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:05:25,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:05:25,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:05:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:25,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:25,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:05:25,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 42 [2023-12-02 18:05:26,085 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 12 treesize of output 10 [2023-12-02 18:05:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:05:27,068 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:27,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630374624] [2023-12-02 18:05:27,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630374624] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:27,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:05:27,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 14 [2023-12-02 18:05:27,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840708785] [2023-12-02 18:05:27,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:05:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:05:27,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:05:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:05:27,070 INFO L87 Difference]: Start difference. First operand 290 states and 335 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:05:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:30,433 INFO L93 Difference]: Finished difference Result 319 states and 366 transitions. [2023-12-02 18:05:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:05:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2023-12-02 18:05:30,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:30,436 INFO L225 Difference]: With dead ends: 319 [2023-12-02 18:05:30,436 INFO L226 Difference]: Without dead ends: 319 [2023-12-02 18:05:30,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:05:30,437 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 72 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:30,437 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1040 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-12-02 18:05:30,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-12-02 18:05:30,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 290. [2023-12-02 18:05:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 158 states have (on average 1.860759493670886) internal successors, (294), 266 states have internal predecessors, (294), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2023-12-02 18:05:30,442 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 32 [2023-12-02 18:05:30,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:30,442 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2023-12-02 18:05:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:05:30,442 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2023-12-02 18:05:30,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 18:05:30,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:30,443 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:30,445 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (61)] Ended with exit code 0 [2023-12-02 18:05:30,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:30,643 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr81ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:30,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:30,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1840468825, now seen corresponding path program 1 times [2023-12-02 18:05:30,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:30,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137207850] [2023-12-02 18:05:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:30,644 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 18:05:30,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:30,645 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:30,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (62)] Waiting until timeout for monitored process [2023-12-02 18:05:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:30,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:05:30,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:05:31,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:05:31,743 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137207850] [2023-12-02 18:05:31,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137207850] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:31,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [3060010] [2023-12-02 18:05:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:31,743 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:05:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:05:31,744 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:05:31,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2023-12-02 18:05:31,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:31,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:05:31,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:31,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:32,034 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:05:32,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [3060010] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:32,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238950004] [2023-12-02 18:05:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:32,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:32,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:05:32,035 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:05:32,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-12-02 18:05:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:32,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:05:32,149 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:32,219 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:32,219 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:05:32,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238950004] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:32,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:05:32,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 18:05:32,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932066987] [2023-12-02 18:05:32,315 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:05:32,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:05:32,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:05:32,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:05:32,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:05:32,316 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 18:05:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:35,819 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2023-12-02 18:05:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:05:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) Word has length 33 [2023-12-02 18:05:35,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:35,822 INFO L225 Difference]: With dead ends: 291 [2023-12-02 18:05:35,823 INFO L226 Difference]: Without dead ends: 291 [2023-12-02 18:05:35,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:05:35,823 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 449 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:35,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 1136 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-02 18:05:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-12-02 18:05:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 289. [2023-12-02 18:05:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 158 states have (on average 1.8544303797468353) internal successors, (293), 265 states have internal predecessors, (293), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2023-12-02 18:05:35,829 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 33 [2023-12-02 18:05:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:35,829 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2023-12-02 18:05:35,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 6 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-02 18:05:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2023-12-02 18:05:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 18:05:35,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:35,830 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:35,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (63)] Ended with exit code 0 [2023-12-02 18:05:36,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-12-02 18:05:36,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (62)] Forceful destruction successful, exit code 0 [2023-12-02 18:05:36,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:36,431 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:36,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1219959145, now seen corresponding path program 1 times [2023-12-02 18:05:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:36,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1349122851] [2023-12-02 18:05:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:36,432 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:05:36,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:36,433 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:36,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (65)] Waiting until timeout for monitored process [2023-12-02 18:05:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:36,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:05:36,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:36,554 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 18:05:36,703 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:36,703 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:36,894 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1349122851] [2023-12-02 18:05:36,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1349122851] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [296165596] [2023-12-02 18:05:36,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:05:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:05:36,896 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:05:36,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2023-12-02 18:05:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:37,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:05:37,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:37,150 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 18:05:37,235 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:37,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [296165596] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:37,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814594419] [2023-12-02 18:05:37,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:05:37,451 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:05:37,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-12-02 18:05:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:37,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:05:37,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:37,603 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 18:05:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:37,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:05:37,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814594419] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:05:37,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:05:37,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2023-12-02 18:05:37,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801715205] [2023-12-02 18:05:37,884 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:05:37,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:05:37,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:05:37,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:05:37,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:05:37,885 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:05:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:40,958 INFO L93 Difference]: Finished difference Result 313 states and 353 transitions. [2023-12-02 18:05:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:05:40,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-12-02 18:05:40,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:40,961 INFO L225 Difference]: With dead ends: 313 [2023-12-02 18:05:40,961 INFO L226 Difference]: Without dead ends: 313 [2023-12-02 18:05:40,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 191 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:05:40,961 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 147 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:40,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 796 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 18:05:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2023-12-02 18:05:40,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 292. [2023-12-02 18:05:40,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 161 states have (on average 1.8385093167701863) internal successors, (296), 268 states have internal predecessors, (296), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:40,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 336 transitions. [2023-12-02 18:05:40,967 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 336 transitions. Word has length 34 [2023-12-02 18:05:40,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:40,968 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 336 transitions. [2023-12-02 18:05:40,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:05:40,968 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 336 transitions. [2023-12-02 18:05:40,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 18:05:40,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:40,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:40,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2023-12-02 18:05:41,171 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (65)] Ended with exit code 0 [2023-12-02 18:05:41,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2023-12-02 18:05:41,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:05:41,569 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr93REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:41,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:41,570 INFO L85 PathProgramCache]: Analyzing trace with hash -75851683, now seen corresponding path program 1 times [2023-12-02 18:05:41,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:41,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642170482] [2023-12-02 18:05:41,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:41,570 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 18:05:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:41,571 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:41,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (68)] Waiting until timeout for monitored process [2023-12-02 18:05:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:41,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:05:41,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:05:41,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:05:41,697 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:41,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642170482] [2023-12-02 18:05:41,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642170482] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:05:41,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:05:41,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:05:41,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396703215] [2023-12-02 18:05:41,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:41,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:05:41,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:05:41,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:05:41,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:05:41,698 INFO L87 Difference]: Start difference. First operand 292 states and 336 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:05:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:42,644 INFO L93 Difference]: Finished difference Result 304 states and 351 transitions. [2023-12-02 18:05:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:05:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-12-02 18:05:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:42,648 INFO L225 Difference]: With dead ends: 304 [2023-12-02 18:05:42,648 INFO L226 Difference]: Without dead ends: 304 [2023-12-02 18:05:42,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 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 18:05:42,648 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 28 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:42,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 585 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 18:05:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2023-12-02 18:05:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 293. [2023-12-02 18:05:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 163 states have (on average 1.834355828220859) internal successors, (299), 269 states have internal predecessors, (299), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 339 transitions. [2023-12-02 18:05:42,654 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 339 transitions. Word has length 34 [2023-12-02 18:05:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:42,654 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 339 transitions. [2023-12-02 18:05:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:05:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 339 transitions. [2023-12-02 18:05:42,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 18:05:42,654 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:42,654 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:42,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (68)] Forceful destruction successful, exit code 0 [2023-12-02 18:05:42,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:42,855 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr94REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:42,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:42,855 INFO L85 PathProgramCache]: Analyzing trace with hash -75851682, now seen corresponding path program 1 times [2023-12-02 18:05:42,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:42,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024097466] [2023-12-02 18:05:42,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:42,856 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 18:05:42,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:42,857 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:42,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (69)] Waiting until timeout for monitored process [2023-12-02 18:05:42,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:42,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:05:42,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:43,433 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:05:43,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:05:43,447 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 5 treesize of output 3 [2023-12-02 18:05:43,506 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-12-02 18:05:43,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-12-02 18:05:43,522 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 5 treesize of output 3 [2023-12-02 18:05:43,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-02 18:05:44,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-12-02 18:05:44,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-02 18:05:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 18:05:44,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:44,343 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 12 treesize of output 10 [2023-12-02 18:05:44,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 18:05:44,827 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024097466] [2023-12-02 18:05:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024097466] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:44,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 18:05:44,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2023-12-02 18:05:44,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003281748] [2023-12-02 18:05:44,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:05:44,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:05:44,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:05:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:05:44,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2023-12-02 18:05:44,829 INFO L87 Difference]: Start difference. First operand 293 states and 339 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:05:46,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:05:46,861 INFO L93 Difference]: Finished difference Result 297 states and 342 transitions. [2023-12-02 18:05:46,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 18:05:46,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-12-02 18:05:46,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:05:46,863 INFO L225 Difference]: With dead ends: 297 [2023-12-02 18:05:46,863 INFO L226 Difference]: Without dead ends: 297 [2023-12-02 18:05:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:05:46,864 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 19 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 1307 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-12-02 18:05:46,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 1307 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-12-02 18:05:46,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-12-02 18:05:46,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 294. [2023-12-02 18:05:46,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 164 states have (on average 1.829268292682927) internal successors, (300), 270 states have internal predecessors, (300), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (24), 17 states have call predecessors, (24), 16 states have call successors, (24) [2023-12-02 18:05:46,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 340 transitions. [2023-12-02 18:05:46,869 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 340 transitions. Word has length 34 [2023-12-02 18:05:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:05:46,869 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 340 transitions. [2023-12-02 18:05:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-02 18:05:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 340 transitions. [2023-12-02 18:05:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:05:46,869 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:05:46,869 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:05:46,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (69)] Ended with exit code 0 [2023-12-02 18:05:47,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:47,070 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:05:47,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:05:47,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1943565854, now seen corresponding path program 1 times [2023-12-02 18:05:47,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:05:47,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [502995375] [2023-12-02 18:05:47,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:47,071 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 18:05:47,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:05:47,072 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:05:47,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (70)] Waiting until timeout for monitored process [2023-12-02 18:05:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:47,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:05:47,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:05:52,488 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32)) (v_DerPreprocessor_6 (_ BitVec 1))) (and (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (= (_ bv0 1) (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv1 1)) |ULTIMATE.start_entry_point_~cfg~2#1.base| v_DerPreprocessor_6) |ULTIMATE.start_entry_point_~client~0#1.base|)) |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32))))) is different from true [2023-12-02 18:05:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:05:52,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:05:53,103 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 15 treesize of output 13 [2023-12-02 18:05:53,729 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((|v_ULTIMATE.start_entry_point_#t~ret70#1.base_116| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret70#1.base_116|))) (= (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret70#1.base_116| (_ bv0 1)) (_ bv0 32) (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))) (not (= |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))) (forall ((|v_ULTIMATE.start_entry_point_#t~ret70#1.base_116| (_ BitVec 32))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret70#1.base_116| (_ bv0 1)))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret70#1.base_116|))) (not (= (_ bv0 1) (bvadd (select .cse0 |c_ULTIMATE.start_entry_point_~client~0#1.base|) (_ bv1 1)))) (= (store .cse0 |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_ULTIMATE.start_main_old_#valid#1|))))) is different from false [2023-12-02 18:05:53,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:05:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [502995375] [2023-12-02 18:05:53,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [502995375] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:05:53,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1518696682] [2023-12-02 18:05:53,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:05:53,735 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:05:53,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:05:53,736 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:05:53,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (71)] Waiting until timeout for monitored process [2023-12-02 18:05:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:05:54,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-02 18:05:54,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:00,421 WARN L876 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((v_DerPreprocessor_11 (_ BitVec 1)) (|ULTIMATE.start_entry_point_~cfg~2#1.base| (_ BitVec 32)) (|ULTIMATE.start_entry_point_~client~0#1.base| (_ BitVec 32))) (and (= (_ bv0 1) (select (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (select (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv1 1)) |ULTIMATE.start_entry_point_~cfg~2#1.base| v_DerPreprocessor_11) |ULTIMATE.start_entry_point_~client~0#1.base|)) |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= (store (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~cfg~2#1.base| (_ bv0 1)) |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1)) |c_#valid|) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| |ULTIMATE.start_entry_point_~cfg~2#1.base|)) (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~client~0#1.base|)) (not (= |ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 32)))))) is different from true [2023-12-02 18:06:00,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:06:00,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:01,128 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 15 treesize of output 13 [2023-12-02 18:06:07,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1518696682] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:06:07,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821614930] [2023-12-02 18:06:07,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:06:07,060 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:06:07,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-12-02 18:06:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:07,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 18:06:07,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:06:25,029 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:25,694 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_entry_point_#t~ret70#1.base_124| (_ BitVec 32))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret70#1.base_124|))) (= |c_ULTIMATE.start_main_old_#valid#1| (store (store |c_#valid| |v_ULTIMATE.start_entry_point_#t~ret70#1.base_124| (_ bv0 1)) |c_ULTIMATE.start_entry_point_~client~0#1.base| (_ bv0 1))))) is different from false [2023-12-02 18:06:25,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821614930] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:06:25,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:06:25,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 26 [2023-12-02 18:06:25,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111495548] [2023-12-02 18:06:25,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:06:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-02 18:06:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:06:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-02 18:06:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1174, Unknown=18, NotChecked=292, Total=1640 [2023-12-02 18:06:25,699 INFO L87 Difference]: Start difference. First operand 294 states and 340 transitions. Second operand has 28 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 18:06:27,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec, FloatRoundingMode], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:35,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:38,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:43,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:45,508 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:47,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:50,491 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:06:53,652 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 [0] [2023-12-02 18:06:57,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:06:57,063 INFO L93 Difference]: Finished difference Result 306 states and 351 transitions. [2023-12-02 18:06:57,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 18:06:57,064 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 35 [2023-12-02 18:06:57,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:06:57,066 INFO L225 Difference]: With dead ends: 306 [2023-12-02 18:06:57,066 INFO L226 Difference]: Without dead ends: 292 [2023-12-02 18:06:57,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 36.0s TimeCoverageRelationStatistics Valid=246, Invalid=1732, Unknown=18, NotChecked=356, Total=2352 [2023-12-02 18:06:57,068 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 76 mSDsluCounter, 2507 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 27 mSolverCounterUnsat, 24 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 2731 SdHoareTripleChecker+Invalid, 3448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 24 IncrementalHoareTripleChecker+Unknown, 612 IncrementalHoareTripleChecker+Unchecked, 29.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:06:57,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 2731 Invalid, 3448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2785 Invalid, 24 Unknown, 612 Unchecked, 29.2s Time] [2023-12-02 18:06:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-02 18:06:57,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2023-12-02 18:06:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 162 states have (on average 1.8395061728395061) internal successors, (298), 269 states have internal predecessors, (298), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:06:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 337 transitions. [2023-12-02 18:06:57,074 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 337 transitions. Word has length 35 [2023-12-02 18:06:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:06:57,074 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 337 transitions. [2023-12-02 18:06:57,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 21 states have internal predecessors, (68), 8 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-12-02 18:06:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 337 transitions. [2023-12-02 18:06:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-02 18:06:57,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:57,075 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:06:57,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (70)] Ended with exit code 0 [2023-12-02 18:06:57,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (71)] Forceful destruction successful, exit code 0 [2023-12-02 18:06:57,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-12-02 18:06:57,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:06:57,676 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr103ASSERT_VIOLATIONMEMORY_LEAK === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:06:57,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash 590256157, now seen corresponding path program 1 times [2023-12-02 18:06:57,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:06:57,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [832491982] [2023-12-02 18:06:57,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:57,676 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 18:06:57,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:06:57,677 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:06:57,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (73)] Waiting until timeout for monitored process [2023-12-02 18:06:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:57,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:06:57,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:06:57,822 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:06:57,822 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:06:57,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [832491982] [2023-12-02 18:06:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [832491982] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:06:57,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:06:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:06:57,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177889272] [2023-12-02 18:06:57,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:06:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:06:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:06:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:06:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:06:57,824 INFO L87 Difference]: Start difference. First operand 292 states and 337 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:06:58,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:06:58,281 INFO L93 Difference]: Finished difference Result 282 states and 326 transitions. [2023-12-02 18:06:58,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:06:58,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-12-02 18:06:58,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:06:58,283 INFO L225 Difference]: With dead ends: 282 [2023-12-02 18:06:58,283 INFO L226 Difference]: Without dead ends: 282 [2023-12-02 18:06:58,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:06:58,284 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 201 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 827 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:06:58,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 827 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:06:58,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-12-02 18:06:58,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2023-12-02 18:06:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 152 states have (on average 1.888157894736842) internal successors, (287), 259 states have internal predecessors, (287), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:06:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 326 transitions. [2023-12-02 18:06:58,290 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 326 transitions. Word has length 35 [2023-12-02 18:06:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:06:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 326 transitions. [2023-12-02 18:06:58,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 18:06:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 326 transitions. [2023-12-02 18:06:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-02 18:06:58,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:06:58,290 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:06:58,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (73)] Ended with exit code 0 [2023-12-02 18:06:58,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:06:58,491 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr85ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:06:58,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:06:58,491 INFO L85 PathProgramCache]: Analyzing trace with hash -209951938, now seen corresponding path program 1 times [2023-12-02 18:06:58,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:06:58,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [261328334] [2023-12-02 18:06:58,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:58,491 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 18:06:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:06:58,492 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:06:58,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (74)] Waiting until timeout for monitored process [2023-12-02 18:06:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:58,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:06:58,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:58,604 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 18:06:58,758 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:06:58,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:06:58,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:06:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:06:58,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:06:59,263 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 8 treesize of output 6 [2023-12-02 18:06:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:06:59,483 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:06:59,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [261328334] [2023-12-02 18:06:59,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [261328334] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:06:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [976271752] [2023-12-02 18:06:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:06:59,484 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:06:59,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:06:59,485 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:06:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (75)] Waiting until timeout for monitored process [2023-12-02 18:06:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:06:59,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 18:06:59,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:06:59,676 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 18:06:59,744 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:06:59,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:06:59,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:06:59,871 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:06:59,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:00,138 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 8 treesize of output 6 [2023-12-02 18:07:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:07:00,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [976271752] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:00,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098518296] [2023-12-02 18:07:00,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:00,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:00,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:00,359 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:00,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-12-02 18:07:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:00,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:07:00,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:00,485 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 18:07:00,550 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:07:00,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:07:00,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:00,677 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:07:00,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:00,948 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 8 treesize of output 6 [2023-12-02 18:07:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 18:07:01,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098518296] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:01,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:07:01,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 10 [2023-12-02 18:07:01,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409216172] [2023-12-02 18:07:01,177 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 18:07:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:01,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 18:07:01,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2023-12-02 18:07:01,178 INFO L87 Difference]: Start difference. First operand 282 states and 326 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 18:07:05,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:05,670 INFO L93 Difference]: Finished difference Result 303 states and 343 transitions. [2023-12-02 18:07:05,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:07:05,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2023-12-02 18:07:05,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:05,674 INFO L225 Difference]: With dead ends: 303 [2023-12-02 18:07:05,674 INFO L226 Difference]: Without dead ends: 303 [2023-12-02 18:07:05,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 193 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-02 18:07:05,675 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 366 mSDsluCounter, 941 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:05,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1112 Invalid, 1137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:07:05,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-12-02 18:07:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 285. [2023-12-02 18:07:05,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 155 states have (on average 1.8709677419354838) internal successors, (290), 262 states have internal predecessors, (290), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 16 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:05,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 329 transitions. [2023-12-02 18:07:05,681 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 329 transitions. Word has length 37 [2023-12-02 18:07:05,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:05,681 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 329 transitions. [2023-12-02 18:07:05,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 3 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-12-02 18:07:05,681 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 329 transitions. [2023-12-02 18:07:05,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:07:05,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:05,682 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:05,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (75)] Ended with exit code 0 [2023-12-02 18:07:05,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (74)] Ended with exit code 0 [2023-12-02 18:07:06,088 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-12-02 18:07:06,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:06,283 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:06,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:06,284 INFO L85 PathProgramCache]: Analyzing trace with hash 426191872, now seen corresponding path program 1 times [2023-12-02 18:07:06,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:06,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411178333] [2023-12-02 18:07:06,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:06,284 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 18:07:06,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:06,285 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:06,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (77)] Waiting until timeout for monitored process [2023-12-02 18:07:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:06,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:07:06,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:06,527 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:06,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:07:06,527 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:06,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411178333] [2023-12-02 18:07:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411178333] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:06,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:06,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:07:06,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451393043] [2023-12-02 18:07:06,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:06,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:07:06,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:06,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:07:06,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:06,529 INFO L87 Difference]: Start difference. First operand 285 states and 329 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:07:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:07,201 INFO L93 Difference]: Finished difference Result 317 states and 366 transitions. [2023-12-02 18:07:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:07:07,203 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-12-02 18:07:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:07,205 INFO L225 Difference]: With dead ends: 317 [2023-12-02 18:07:07,205 INFO L226 Difference]: Without dead ends: 317 [2023-12-02 18:07:07,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:07,206 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 34 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:07,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1005 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-02 18:07:07,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2023-12-02 18:07:07,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 287. [2023-12-02 18:07:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 157 states have (on average 1.8598726114649682) internal successors, (292), 263 states have internal predecessors, (292), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 331 transitions. [2023-12-02 18:07:07,212 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 331 transitions. Word has length 40 [2023-12-02 18:07:07,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:07,212 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 331 transitions. [2023-12-02 18:07:07,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:07:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 331 transitions. [2023-12-02 18:07:07,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:07:07,213 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:07,213 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:07,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (77)] Ended with exit code 0 [2023-12-02 18:07:07,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:07,414 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr77ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:07,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:07,414 INFO L85 PathProgramCache]: Analyzing trace with hash 931750497, now seen corresponding path program 2 times [2023-12-02 18:07:07,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:07,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294036932] [2023-12-02 18:07:07,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:07:07,415 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 18:07:07,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:07,416 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:07,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (78)] Waiting until timeout for monitored process [2023-12-02 18:07:07,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:07:07,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:07:07,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:07:07,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:07,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:07,694 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:07,695 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294036932] [2023-12-02 18:07:07,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294036932] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:07,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1949413730] [2023-12-02 18:07:07,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:07:07,695 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:07:07,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:07:07,696 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:07:07,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (79)] Waiting until timeout for monitored process [2023-12-02 18:07:07,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:07:07,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:07:07,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:07:07,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:07,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:08,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1949413730] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:08,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746078210] [2023-12-02 18:07:08,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 18:07:08,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:08,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:08,015 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:08,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-12-02 18:07:08,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 18:07:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 18:07:08,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:07:08,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:08,193 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:08,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:08,261 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:08,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746078210] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:08,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:07:08,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2023-12-02 18:07:08,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084498169] [2023-12-02 18:07:08,262 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:08,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:07:08,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:08,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:07:08,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:08,263 INFO L87 Difference]: Start difference. First operand 287 states and 331 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:07:08,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:08,711 INFO L93 Difference]: Finished difference Result 286 states and 330 transitions. [2023-12-02 18:07:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:07:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2023-12-02 18:07:08,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:08,714 INFO L225 Difference]: With dead ends: 286 [2023-12-02 18:07:08,715 INFO L226 Difference]: Without dead ends: 286 [2023-12-02 18:07:08,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:08,715 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 193 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:08,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 815 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 18:07:08,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-12-02 18:07:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2023-12-02 18:07:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 157 states have (on average 1.8535031847133758) internal successors, (291), 262 states have internal predecessors, (291), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 330 transitions. [2023-12-02 18:07:08,722 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 330 transitions. Word has length 40 [2023-12-02 18:07:08,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:08,722 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 330 transitions. [2023-12-02 18:07:08,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-02 18:07:08,722 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 330 transitions. [2023-12-02 18:07:08,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 18:07:08,723 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:08,723 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:08,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (78)] Ended with exit code 0 [2023-12-02 18:07:08,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (79)] Ended with exit code 0 [2023-12-02 18:07:09,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-12-02 18:07:09,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:09,324 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr88ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:09,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:09,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1205376912, now seen corresponding path program 1 times [2023-12-02 18:07:09,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:09,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1014084588] [2023-12-02 18:07:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:09,325 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 18:07:09,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:09,325 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:09,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (81)] Waiting until timeout for monitored process [2023-12-02 18:07:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:09,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:07:09,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:09,442 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 18:07:09,632 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:07:09,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:07:09,852 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:07:09,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:07:10,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:10,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:10,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 18:07:10,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:10,800 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:10,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1014084588] [2023-12-02 18:07:10,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1014084588] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:10,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1344041804] [2023-12-02 18:07:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:10,800 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:07:10,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:07:10,801 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:07:10,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (82)] Waiting until timeout for monitored process [2023-12-02 18:07:11,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:11,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-02 18:07:11,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:11,043 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 18:07:11,145 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:07:11,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:07:11,357 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:07:11,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:07:11,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:11,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:07:11,575 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:12,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1344041804] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:12,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580488076] [2023-12-02 18:07:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:12,183 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:12,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-12-02 18:07:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:12,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 18:07:12,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:12,313 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 18:07:12,372 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:07:12,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:07:12,488 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:07:12,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:07:12,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:12,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:07:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 18:07:12,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580488076] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:07:13,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:07:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 13 [2023-12-02 18:07:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113828304] [2023-12-02 18:07:13,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:13,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 18:07:13,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 18:07:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-12-02 18:07:13,299 INFO L87 Difference]: Start difference. First operand 286 states and 330 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 18:07:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:17,748 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2023-12-02 18:07:17,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 18:07:17,749 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2023-12-02 18:07:17,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:17,751 INFO L225 Difference]: With dead ends: 306 [2023-12-02 18:07:17,751 INFO L226 Difference]: Without dead ends: 306 [2023-12-02 18:07:17,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 10 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-12-02 18:07:17,751 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 256 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 1217 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:17,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 1217 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-12-02 18:07:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-02 18:07:17,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 289. [2023-12-02 18:07:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 160 states have (on average 1.8375) internal successors, (294), 265 states have internal predecessors, (294), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 17 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2023-12-02 18:07:17,756 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 40 [2023-12-02 18:07:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:17,756 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2023-12-02 18:07:17,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-02 18:07:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2023-12-02 18:07:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 18:07:17,757 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:17,757 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:17,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (81)] Ended with exit code 0 [2023-12-02 18:07:17,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (82)] Ended with exit code 0 [2023-12-02 18:07:18,162 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-12-02 18:07:18,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:18,358 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:18,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:18,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1180511779, now seen corresponding path program 1 times [2023-12-02 18:07:18,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:18,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135944185] [2023-12-02 18:07:18,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:18,359 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 18:07:18,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:18,360 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:18,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (84)] Waiting until timeout for monitored process [2023-12-02 18:07:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:18,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:07:18,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:18,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:07:18,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:18,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135944185] [2023-12-02 18:07:18,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135944185] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:18,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:18,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:07:18,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836426284] [2023-12-02 18:07:18,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:18,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:07:18,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:18,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:07:18,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:18,565 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:19,212 INFO L93 Difference]: Finished difference Result 334 states and 383 transitions. [2023-12-02 18:07:19,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:07:19,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2023-12-02 18:07:19,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:19,215 INFO L225 Difference]: With dead ends: 334 [2023-12-02 18:07:19,215 INFO L226 Difference]: Without dead ends: 334 [2023-12-02 18:07:19,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:19,215 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 41 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:19,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1087 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-02 18:07:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2023-12-02 18:07:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 291. [2023-12-02 18:07:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 162 states have (on average 1.8271604938271604) internal successors, (296), 266 states have internal predecessors, (296), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 335 transitions. [2023-12-02 18:07:19,223 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 335 transitions. Word has length 41 [2023-12-02 18:07:19,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:19,223 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 335 transitions. [2023-12-02 18:07:19,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 335 transitions. [2023-12-02 18:07:19,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 18:07:19,224 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:19,224 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:19,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (84)] Ended with exit code 0 [2023-12-02 18:07:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:19,424 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr78ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:19,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1180505256, now seen corresponding path program 1 times [2023-12-02 18:07:19,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [194549333] [2023-12-02 18:07:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:19,425 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:07:19,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:19,426 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:19,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (85)] Waiting until timeout for monitored process [2023-12-02 18:07:19,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:19,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:07:19,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 18:07:20,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:20,755 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:20,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [194549333] [2023-12-02 18:07:20,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [194549333] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:20,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [933483885] [2023-12-02 18:07:20,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:20,756 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:07:20,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:07:20,757 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:07:20,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (86)] Waiting until timeout for monitored process [2023-12-02 18:07:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:21,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:07:21,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:21,105 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:21,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:21,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [933483885] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:21,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766652928] [2023-12-02 18:07:21,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:21,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:21,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:21,208 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:21,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-12-02 18:07:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:21,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 18:07:21,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:21,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:21,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766652928] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:21,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:07:21,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-12-02 18:07:21,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205327807] [2023-12-02 18:07:21,584 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:21,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 18:07:21,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:21,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 18:07:21,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:07:21,586 INFO L87 Difference]: Start difference. First operand 291 states and 335 transitions. Second operand has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:07:24,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:24,651 INFO L93 Difference]: Finished difference Result 292 states and 336 transitions. [2023-12-02 18:07:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 18:07:24,652 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) Word has length 41 [2023-12-02 18:07:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:24,654 INFO L225 Difference]: With dead ends: 292 [2023-12-02 18:07:24,654 INFO L226 Difference]: Without dead ends: 292 [2023-12-02 18:07:24,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 229 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-12-02 18:07:24,655 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 672 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:24,655 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1079 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-12-02 18:07:24,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-12-02 18:07:24,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 290. [2023-12-02 18:07:24,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 162 states have (on average 1.8209876543209877) internal successors, (295), 265 states have internal predecessors, (295), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2023-12-02 18:07:24,661 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 41 [2023-12-02 18:07:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:24,661 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2023-12-02 18:07:24,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (11), 6 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-02 18:07:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2023-12-02 18:07:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 18:07:24,661 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:24,662 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:24,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (86)] Ended with exit code 0 [2023-12-02 18:07:24,868 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-12-02 18:07:25,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (85)] Forceful destruction successful, exit code 0 [2023-12-02 18:07:25,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:25,263 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:25,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:25,263 INFO L85 PathProgramCache]: Analyzing trace with hash -2068015460, now seen corresponding path program 1 times [2023-12-02 18:07:25,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:25,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1960913077] [2023-12-02 18:07:25,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:25,264 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 18:07:25,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:25,265 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:25,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (88)] Waiting until timeout for monitored process [2023-12-02 18:07:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:25,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 18:07:25,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:25,449 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 18:07:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:25,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:07:25,524 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:25,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1960913077] [2023-12-02 18:07:25,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1960913077] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:25,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 18:07:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623427543] [2023-12-02 18:07:25,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:25,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 18:07:25,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 18:07:25,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:25,526 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:26,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:26,760 INFO L93 Difference]: Finished difference Result 293 states and 337 transitions. [2023-12-02 18:07:26,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 18:07:26,762 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2023-12-02 18:07:26,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:26,763 INFO L225 Difference]: With dead ends: 293 [2023-12-02 18:07:26,763 INFO L226 Difference]: Without dead ends: 293 [2023-12-02 18:07:26,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 18:07:26,764 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 11 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:26,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 750 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 18:07:26,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-12-02 18:07:26,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 289. [2023-12-02 18:07:26,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 162 states have (on average 1.8148148148148149) internal successors, (294), 264 states have internal predecessors, (294), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2023-12-02 18:07:26,769 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 41 [2023-12-02 18:07:26,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:26,769 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2023-12-02 18:07:26,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:26,769 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2023-12-02 18:07:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-02 18:07:26,770 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:26,770 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:26,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (88)] Ended with exit code 0 [2023-12-02 18:07:26,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:26,970 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:26,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -2068015459, now seen corresponding path program 1 times [2023-12-02 18:07:26,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:26,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1719031531] [2023-12-02 18:07:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:26,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 18:07:26,971 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:26,972 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:26,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (89)] Waiting until timeout for monitored process [2023-12-02 18:07:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:27,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 18:07:27,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:27,125 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 18:07:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-02 18:07:27,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:07:27,248 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:27,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1719031531] [2023-12-02 18:07:27,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1719031531] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:27,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:27,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 18:07:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208125480] [2023-12-02 18:07:27,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:27,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 18:07:27,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 18:07:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 18:07:27,249 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:29,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:29,100 INFO L93 Difference]: Finished difference Result 330 states and 379 transitions. [2023-12-02 18:07:29,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:07:29,101 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 41 [2023-12-02 18:07:29,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:29,103 INFO L225 Difference]: With dead ends: 330 [2023-12-02 18:07:29,103 INFO L226 Difference]: Without dead ends: 330 [2023-12-02 18:07:29,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:07:29,103 INFO L413 NwaCegarLoop]: 266 mSDtfsCounter, 50 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:29,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1096 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 18:07:29,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-12-02 18:07:29,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 288. [2023-12-02 18:07:29,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 162 states have (on average 1.808641975308642) internal successors, (293), 263 states have internal predecessors, (293), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:29,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2023-12-02 18:07:29,110 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 41 [2023-12-02 18:07:29,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:29,111 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2023-12-02 18:07:29,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:29,111 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2023-12-02 18:07:29,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:07:29,112 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:29,112 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:29,115 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (89)] Ended with exit code 0 [2023-12-02 18:07:29,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:29,312 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr79ASSERT_VIOLATIONMEMORY_FREE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:29,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:29,313 INFO L85 PathProgramCache]: Analyzing trace with hash 2059043139, now seen corresponding path program 1 times [2023-12-02 18:07:29,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:29,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [319839570] [2023-12-02 18:07:29,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:29,313 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 18:07:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:29,314 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:29,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (90)] Waiting until timeout for monitored process [2023-12-02 18:07:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:29,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:07:29,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:29,440 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 18:07:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:29,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:29,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [319839570] [2023-12-02 18:07:29,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [319839570] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:29,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [769785675] [2023-12-02 18:07:29,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:29,760 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:07:29,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:07:29,761 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:07:29,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (91)] Waiting until timeout for monitored process [2023-12-02 18:07:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:30,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 18:07:30,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:30,020 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 18:07:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:30,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:30,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [769785675] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:30,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23493032] [2023-12-02 18:07:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:30,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:30,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:30,264 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:30,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-12-02 18:07:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:30,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 18:07:30,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:30,413 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 18:07:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:30,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:07:30,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23493032] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:30,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:07:30,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 6 [2023-12-02 18:07:30,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744682527] [2023-12-02 18:07:30,654 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:30,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 18:07:30,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:30,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 18:07:30,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-02 18:07:30,655 INFO L87 Difference]: Start difference. First operand 288 states and 332 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 18:07:32,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:32,890 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2023-12-02 18:07:32,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 18:07:32,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2023-12-02 18:07:32,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:32,892 INFO L225 Difference]: With dead ends: 306 [2023-12-02 18:07:32,892 INFO L226 Difference]: Without dead ends: 306 [2023-12-02 18:07:32,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 239 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 18:07:32,893 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 173 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:32,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 662 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 18:07:32,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-12-02 18:07:32,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 291. [2023-12-02 18:07:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 165 states have (on average 1.793939393939394) internal successors, (296), 266 states have internal predecessors, (296), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:32,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 335 transitions. [2023-12-02 18:07:32,897 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 335 transitions. Word has length 42 [2023-12-02 18:07:32,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:32,898 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 335 transitions. [2023-12-02 18:07:32,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-02 18:07:32,898 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 335 transitions. [2023-12-02 18:07:32,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:07:32,898 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:32,898 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:32,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (91)] Ended with exit code 0 [2023-12-02 18:07:33,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2023-12-02 18:07:33,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (90)] Forceful destruction successful, exit code 0 [2023-12-02 18:07:33,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:33,499 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:33,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:33,499 INFO L85 PathProgramCache]: Analyzing trace with hash 316042856, now seen corresponding path program 1 times [2023-12-02 18:07:33,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:33,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571473960] [2023-12-02 18:07:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:33,500 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 18:07:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:33,501 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:33,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (93)] Waiting until timeout for monitored process [2023-12-02 18:07:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:33,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 18:07:33,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:33,725 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:07:33,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:07:33,742 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-02 18:07:33,742 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 18:07:33,742 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:33,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571473960] [2023-12-02 18:07:33,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1571473960] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 18:07:33,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 18:07:33,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 18:07:33,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162026928] [2023-12-02 18:07:33,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 18:07:33,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 18:07:33,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:33,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 18:07:33,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 18:07:33,743 INFO L87 Difference]: Start difference. First operand 291 states and 335 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:07:34,616 INFO L93 Difference]: Finished difference Result 290 states and 334 transitions. [2023-12-02 18:07:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 18:07:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 42 [2023-12-02 18:07:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:07:34,619 INFO L225 Difference]: With dead ends: 290 [2023-12-02 18:07:34,619 INFO L226 Difference]: Without dead ends: 290 [2023-12-02 18:07:34,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 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 18:07:34,619 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 10 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 18:07:34,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 573 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 18:07:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-12-02 18:07:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-12-02 18:07:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 165 states have (on average 1.7878787878787878) internal successors, (295), 265 states have internal predecessors, (295), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:07:34,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 334 transitions. [2023-12-02 18:07:34,624 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 334 transitions. Word has length 42 [2023-12-02 18:07:34,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:07:34,624 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 334 transitions. [2023-12-02 18:07:34,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 18:07:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 334 transitions. [2023-12-02 18:07:34,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:07:34,624 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:07:34,624 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:07:34,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (93)] Ended with exit code 0 [2023-12-02 18:07:34,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:34,825 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:07:34,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:07:34,825 INFO L85 PathProgramCache]: Analyzing trace with hash 316042857, now seen corresponding path program 1 times [2023-12-02 18:07:34,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:07:34,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1455861147] [2023-12-02 18:07:34,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:34,825 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 18:07:34,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:07:34,826 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:07:34,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (94)] Waiting until timeout for monitored process [2023-12-02 18:07:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:35,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:07:35,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:35,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:07:35,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:07:35,232 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:07:35,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:07:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:35,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:37,541 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 50 treesize of output 46 [2023-12-02 18:07:37,653 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:07:37,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2023-12-02 18:07:38,553 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:38,553 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:07:38,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1455861147] [2023-12-02 18:07:38,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1455861147] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:38,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [514142338] [2023-12-02 18:07:38,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:38,555 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:07:38,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:07:38,556 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:07:38,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (95)] Waiting until timeout for monitored process [2023-12-02 18:07:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:38,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 18:07:38,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:39,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:07:39,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:07:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-02 18:07:39,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:44,182 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 47 treesize of output 43 [2023-12-02 18:07:45,766 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:45,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [514142338] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:45,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723968404] [2023-12-02 18:07:45,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:07:45,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:07:45,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:07:45,767 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:07:45,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-12-02 18:07:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:07:45,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 18:07:45,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:07:46,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 18:07:46,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-02 18:07:46,073 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:07:46,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:07:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:46,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:07:46,295 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 50 treesize of output 46 [2023-12-02 18:07:46,389 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:07:46,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 72 [2023-12-02 18:07:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-12-02 18:07:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723968404] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 18:07:46,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 18:07:46,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7, 6, 6, 6] total 21 [2023-12-02 18:07:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952730156] [2023-12-02 18:07:46,852 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 18:07:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 18:07:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:07:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 18:07:46,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=392, Unknown=2, NotChecked=0, Total=462 [2023-12-02 18:07:46,854 INFO L87 Difference]: Start difference. First operand 290 states and 334 transitions. Second operand has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 18 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2023-12-02 18:07:57,434 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 [1] [2023-12-02 18:07:59,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 18:08:01,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 18:08:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:08:07,641 INFO L93 Difference]: Finished difference Result 289 states and 333 transitions. [2023-12-02 18:08:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 18:08:07,643 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 18 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) Word has length 42 [2023-12-02 18:08:07,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:08:07,644 INFO L225 Difference]: With dead ends: 289 [2023-12-02 18:08:07,644 INFO L226 Difference]: Without dead ends: 289 [2023-12-02 18:08:07,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=105, Invalid=489, Unknown=6, NotChecked=0, Total=600 [2023-12-02 18:08:07,645 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 431 mSDsluCounter, 1777 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 31 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 1986 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-12-02 18:08:07,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 1986 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1268 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2023-12-02 18:08:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-12-02 18:08:07,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2023-12-02 18:08:07,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 165 states have (on average 1.7818181818181817) internal successors, (294), 264 states have internal predecessors, (294), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:08:07,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 333 transitions. [2023-12-02 18:08:07,651 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 333 transitions. Word has length 42 [2023-12-02 18:08:07,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:08:07,651 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 333 transitions. [2023-12-02 18:08:07,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 18 states have internal predecessors, (78), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (20), 8 states have call predecessors, (20), 5 states have call successors, (20) [2023-12-02 18:08:07,651 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 333 transitions. [2023-12-02 18:08:07,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 18:08:07,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:08:07,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:08:07,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2023-12-02 18:08:07,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (94)] Ended with exit code 0 [2023-12-02 18:08:08,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (95)] Ended with exit code 0 [2023-12-02 18:08:08,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 18:08:08,253 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr89REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:08:08,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:08:08,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1273971379, now seen corresponding path program 1 times [2023-12-02 18:08:08,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:08:08,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1899908903] [2023-12-02 18:08:08,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:08,253 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 18:08:08,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:08:08,254 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:08:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (97)] Waiting until timeout for monitored process [2023-12-02 18:08:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:08,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-02 18:08:08,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:08,566 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:08,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:08,793 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:08,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:09,070 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:09,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:09,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:08:09,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:08:09,636 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-12-02 18:08:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:08:09,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:08:09,967 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:08:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1899908903] [2023-12-02 18:08:09,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1899908903] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:09,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1123996684] [2023-12-02 18:08:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:09,967 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:08:09,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:08:09,968 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:08:09,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (98)] Waiting until timeout for monitored process [2023-12-02 18:08:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:10,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 18:08:10,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:10,375 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:10,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:10,674 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-12-02 18:08:10,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2023-12-02 18:08:11,345 INFO L349 Elim1Store]: treesize reduction 82, result has 29.3 percent of original size [2023-12-02 18:08:11,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 35 treesize of output 52 [2023-12-02 18:08:12,468 INFO L349 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-12-02 18:08:12,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 37 [2023-12-02 18:08:12,679 INFO L349 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-12-02 18:08:12,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 39 [2023-12-02 18:08:13,136 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-12-02 18:08:13,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2023-12-02 18:08:13,267 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 18:08:13,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:08:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1123996684] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594228126] [2023-12-02 18:08:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:08:14,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:08:14,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:08:14,090 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:08:14,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-12-02 18:08:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:08:14,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 18:08:14,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:08:14,428 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:14,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:14,615 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:14,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:15,026 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-12-02 18:08:15,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-12-02 18:08:15,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-12-02 18:08:16,329 INFO L349 Elim1Store]: treesize reduction 34, result has 26.1 percent of original size [2023-12-02 18:08:16,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2023-12-02 18:08:16,589 INFO L349 Elim1Store]: treesize reduction 25, result has 30.6 percent of original size [2023-12-02 18:08:16,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 27 [2023-12-02 18:08:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 18:08:16,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:08:17,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594228126] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:08:17,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:08:17,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 13] total 25 [2023-12-02 18:08:17,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635499310] [2023-12-02 18:08:17,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:08:17,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-02 18:08:17,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:08:17,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-02 18:08:17,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1091, Unknown=0, NotChecked=0, Total=1406 [2023-12-02 18:08:17,348 INFO L87 Difference]: Start difference. First operand 289 states and 333 transitions. Second operand has 27 states, 25 states have (on average 2.6) internal successors, (65), 20 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 18:08:21,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:22,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:24,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:27,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:29,066 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:31,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:33,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:35,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:37,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:39,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:41,348 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:43,358 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:45,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:48,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:50,494 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:52,501 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:54,510 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:56,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:08:58,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:00,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:02,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:04,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:06,901 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:10,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:12,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:14,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:16,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:18,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:21,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:23,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:25,478 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:27,490 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:29,493 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:31,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:33,796 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:35,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:37,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:40,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:42,250 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:44,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:46,260 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:48,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:49,281 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:51,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:53,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:55,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:57,319 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:09:59,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:00,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:03,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:05,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:08,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:10,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:13,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:15,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:17,435 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:19,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:21,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:23,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:25,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:27,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:29,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:32,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:34,581 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:36,587 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:38,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:40,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:42,792 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:44,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:46,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:48,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:51,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:53,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:55,509 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:57,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:10:59,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:02,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:04,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:06,708 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:08,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:10,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:13,205 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:15,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:17,212 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:19,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:21,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:11:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 18:11:21,344 INFO L93 Difference]: Finished difference Result 350 states and 396 transitions. [2023-12-02 18:11:21,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-02 18:11:21,346 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 2.6) internal successors, (65), 20 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 42 [2023-12-02 18:11:21,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 18:11:21,348 INFO L225 Difference]: With dead ends: 350 [2023-12-02 18:11:21,348 INFO L226 Difference]: Without dead ends: 350 [2023-12-02 18:11:21,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 798 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=529, Invalid=1822, Unknown=1, NotChecked=0, Total=2352 [2023-12-02 18:11:21,350 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 421 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 154 mSolverCounterUnsat, 82 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 180.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 2200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 82 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 180.7s IncrementalHoareTripleChecker+Time [2023-12-02 18:11:21,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1342 Invalid, 2200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1964 Invalid, 82 Unknown, 0 Unchecked, 180.7s Time] [2023-12-02 18:11:21,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-12-02 18:11:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 291. [2023-12-02 18:11:21,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 167 states have (on average 1.7724550898203593) internal successors, (296), 266 states have internal predecessors, (296), 16 states have call successors, (16), 8 states have call predecessors, (16), 10 states have return successors, (23), 18 states have call predecessors, (23), 16 states have call successors, (23) [2023-12-02 18:11:21,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 335 transitions. [2023-12-02 18:11:21,355 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 335 transitions. Word has length 42 [2023-12-02 18:11:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 18:11:21,355 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 335 transitions. [2023-12-02 18:11:21,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 2.6) internal successors, (65), 20 states have internal predecessors, (65), 9 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-02 18:11:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 335 transitions. [2023-12-02 18:11:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 18:11:21,355 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 18:11:21,356 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 18:11:21,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (97)] Ended with exit code 0 [2023-12-02 18:11:21,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (98)] Ended with exit code 0 [2023-12-02 18:11:21,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2023-12-02 18:11:21,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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=3,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:11:21,956 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ldv_msg_freeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ldv_msg_freeErr2ASSERT_VIOLATIONMEMORY_FREE (and 121 more)] === [2023-12-02 18:11:21,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 18:11:21,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1207406531, now seen corresponding path program 1 times [2023-12-02 18:11:21,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 18:11:21,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905109497] [2023-12-02 18:11:21,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:21,957 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 18:11:21,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 18:11:21,958 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 18:11:21,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/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 (100)] Waiting until timeout for monitored process [2023-12-02 18:11:22,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:22,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-02 18:11:22,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:22,168 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 18:11:22,315 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:11:22,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:11:22,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:11:24,499 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_103| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_51| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_103| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_103|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_51|)))) is different from true [2023-12-02 18:11:24,513 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 1 [2023-12-02 18:11:24,678 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:11:24,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:11:24,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 18:11:27,118 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 18:11:27,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 18:11:27,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2023-12-02 18:11:27,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:11:29,713 INFO L349 Elim1Store]: treesize reduction 60, result has 34.1 percent of original size [2023-12-02 18:11:29,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 44 [2023-12-02 18:11:31,249 INFO L349 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-12-02 18:11:31,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2023-12-02 18:11:31,561 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:11:31,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2023-12-02 18:11:31,672 INFO L349 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-12-02 18:11:31,673 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 36 [2023-12-02 18:11:31,918 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:11:31,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 23 [2023-12-02 18:11:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2023-12-02 18:11:32,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:11:32,284 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_25| (_ BitVec 32)) (v_ArrVal_1617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_25| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1617) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 18:11:32,306 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_25| (_ BitVec 32)) (v_ArrVal_1617 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv1 1) (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_25| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base|)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1617) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|))) (_ bv0 1))) is different from false [2023-12-02 18:11:38,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 18:11:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905109497] [2023-12-02 18:11:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905109497] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:11:38,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [496255866] [2023-12-02 18:11:38,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:11:38,093 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 18:11:38,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 18:11:38,094 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 18:11:38,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (101)] Waiting until timeout for monitored process [2023-12-02 18:11:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:11:38,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 42 conjunts are in the unsatisfiable core [2023-12-02 18:11:38,669 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:11:38,684 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 18:11:39,155 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:11:39,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:11:39,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:11:41,619 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_107| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_107| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_107|) (_ bv0 32))))) is different from true [2023-12-02 18:11:41,860 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:11:41,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:11:42,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 18:11:50,588 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 18:11:50,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 18:11:50,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2023-12-02 18:11:51,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:11:55,438 INFO L349 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-12-02 18:11:55,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2023-12-02 18:11:56,094 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-02 18:11:56,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 41 [2023-12-02 18:11:56,509 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2023-12-02 18:11:56,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 73 [2023-12-02 18:11:56,610 INFO L349 Elim1Store]: treesize reduction 72, result has 29.4 percent of original size [2023-12-02 18:11:56,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 52 [2023-12-02 18:11:56,652 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 10 treesize of output 8 [2023-12-02 18:11:56,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 30 [2023-12-02 18:11:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2023-12-02 18:11:57,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:11:57,238 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_26| (_ BitVec 32)) (v_ArrVal_1671 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_26| (_ bv1 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1671) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 18:11:57,256 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_26| (_ BitVec 32)) (v_ArrVal_1671 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_26| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base|)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1671) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)))) is different from false [2023-12-02 18:11:59,281 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_26| (_ BitVec 32)) (v_ArrVal_1671 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_26| (_ bv1 1)) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) |c_ULTIMATE.start_entry_point_#t~ret73#1.base|)) |c_ULTIMATE.start_entry_point_#t~ret73#1.base| v_ArrVal_1671) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1))) is different from false [2023-12-02 18:12:16,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [496255866] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:12:16,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360185406] [2023-12-02 18:12:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 18:12:16,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 18:12:16,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 18:12:16,461 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 18:12:16,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7acbbe0-70b5-4a04-b907-382461483bd8/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2023-12-02 18:12:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 18:12:16,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-02 18:12:16,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 18:12:16,719 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 18:12:16,805 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 18:12:16,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-12-02 18:12:16,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 18:12:18,863 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_111| (_ BitVec 32)) (|v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_58| (_ BitVec 32))) (not (= |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_111| (select (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_entry_point_~client~0#1.base_BEFORE_CALL_111|) |v_ULTIMATE.start_entry_point_~client~0#1.offset_BEFORE_CALL_58|)))) is different from true [2023-12-02 18:12:19,048 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-12-02 18:12:19,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2023-12-02 18:12:19,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 18:12:21,238 INFO L349 Elim1Store]: treesize reduction 36, result has 35.7 percent of original size [2023-12-02 18:12:21,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 28 [2023-12-02 18:12:21,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 19 [2023-12-02 18:12:21,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-02 18:12:27,775 INFO L349 Elim1Store]: treesize reduction 56, result has 35.6 percent of original size [2023-12-02 18:12:27,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 30 treesize of output 51 [2023-12-02 18:12:30,043 INFO L349 Elim1Store]: treesize reduction 31, result has 35.4 percent of original size [2023-12-02 18:12:30,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 53 [2023-12-02 18:12:30,410 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-12-02 18:12:30,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 68 [2023-12-02 18:12:30,590 INFO L349 Elim1Store]: treesize reduction 102, result has 34.6 percent of original size [2023-12-02 18:12:30,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 72 [2023-12-02 18:12:30,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 18:12:30,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 30 [2023-12-02 18:12:31,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 14 not checked. [2023-12-02 18:12:31,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 18:12:31,117 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_27| (_ BitVec 32)) (v_ArrVal_1722 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1723 (_ BitVec 1))) (or (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_27|))) (= (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_27| v_ArrVal_1723) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1722) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1)) (_ bv0 1)))) is different from false [2023-12-02 18:12:31,144 WARN L854 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_27| (_ BitVec 32)) (v_ArrVal_1722 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1723 (_ BitVec 1))) (or (= (_ bv0 1) (bvadd (select (store |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_27| v_ArrVal_1723) (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_entry_point_~client~0#1.base|) (bvadd |c_ULTIMATE.start_entry_point_~client~0#1.offset| (_ bv12 32)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base|)) |c_ULTIMATE.start_entry_point_~adapter~0#1.base| v_ArrVal_1722) |c_ULTIMATE.start_entry_point_~client~0#1.base|) |c_ULTIMATE.start_entry_point_~client~0#1.offset|)) (_ bv1 1))) (not (= (_ bv0 1) (select |c_#valid| |v_ULTIMATE.start_alloc_12_~#chip_id~0#1.base_27|))))) is different from false [2023-12-02 18:13:01,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360185406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 18:13:01,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 18:13:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 43 [2023-12-02 18:13:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144802079] [2023-12-02 18:13:01,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 18:13:01,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-12-02 18:13:01,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 18:13:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-12-02 18:13:01,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2010, Unknown=40, NotChecked=1010, Total=3306 [2023-12-02 18:13:01,213 INFO L87 Difference]: Start difference. First operand 291 states and 335 transitions. Second operand has 44 states, 41 states have (on average 1.6829268292682926) internal successors, (69), 37 states have internal predecessors, (69), 9 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (12), 11 states have call predecessors, (12), 9 states have call successors, (12) [2023-12-02 18:13:03,273 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 [0] [2023-12-02 18:13:05,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:07,295 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:09,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:11,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:13,333 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:15,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:17,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:19,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:21,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:23,676 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:35,801 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:37,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:39,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:41,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:43,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:45,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:47,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:49,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:51,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:53,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:55,998 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:13:58,025 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:00,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:02,045 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:04,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:06,055 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:08,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:10,067 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:12,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:14,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:16,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:18,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:20,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:22,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:24,166 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:26,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:28,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:30,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:32,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:34,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:39,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:41,027 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:45,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:48,392 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:50,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:52,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:54,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:56,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:14:58,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:00,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:02,870 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:04,882 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:07,030 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:09,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:11,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:13,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:15,183 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:17,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:19,193 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:21,202 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:23,204 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:25,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:27,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:31,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:33,554 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:36,533 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:38,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:40,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:42,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:44,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:46,985 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:48,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:50,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:52,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:55,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:57,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:15:59,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:01,024 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:03,687 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:05,695 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:07,720 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:09,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:11,809 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:13,947 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 18:16:15,970 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 [0]