./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c --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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:49:35,653 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:49:35,716 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-12-02 15:49:35,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:49:35,721 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:49:35,744 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:49:35,744 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:49:35,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:49:35,746 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:49:35,746 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:49:35,747 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:49:35,747 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:49:35,748 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:49:35,748 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 15:49:35,749 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:49:35,749 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:49:35,750 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 15:49:35,750 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 15:49:35,750 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:49:35,751 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 15:49:35,752 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 15:49:35,756 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 15:49:35,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:49:35,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:49:35,758 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:49:35,758 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:49:35,758 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:49:35,759 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:49:35,759 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:49:35,759 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:49:35,760 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:49:35,760 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:49:35,760 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:49:35,761 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:49:35,761 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:49:35,761 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:49:35,761 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:49:35,762 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:49:35,762 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:49:35,762 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:49:35,762 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:49:35,762 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:49:35,763 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:49:35,763 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 15:49:35,763 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 15:49:35,763 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:49:35,763 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:49:35,764 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:49:35,764 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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2023-12-02 15:49:35,970 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:49:35,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:49:35,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:49:35,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:49:35,995 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:49:35,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-12-02 15:49:38,733 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:49:38,906 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:49:38,906 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-12-02 15:49:38,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data/e3a28f10b/7483b5576f954ae09583be4bcb0759a7/FLAGba361fb37 [2023-12-02 15:49:38,926 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data/e3a28f10b/7483b5576f954ae09583be4bcb0759a7 [2023-12-02 15:49:38,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:49:38,930 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:49:38,931 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:49:38,931 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:49:38,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:49:38,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:49:38" (1/1) ... [2023-12-02 15:49:38,937 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18471a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:38, skipping insertion in model container [2023-12-02 15:49:38,937 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:49:38" (1/1) ... [2023-12-02 15:49:38,965 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:49:39,146 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:49:39,158 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 15:49:39,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2a02605 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:39, skipping insertion in model container [2023-12-02 15:49:39,158 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:49:39,159 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-12-02 15:49:39,160 INFO L158 Benchmark]: Toolchain (without parser) took 230.22ms. Allocated memory is still 123.7MB. Free memory was 88.8MB in the beginning and 78.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 15:49:39,161 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 97.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 15:49:39,162 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.90ms. Allocated memory is still 123.7MB. Free memory was 88.4MB in the beginning and 78.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 15:49:39,163 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 123.7MB. Free memory is still 97.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 227.90ms. Allocated memory is still 123.7MB. Free memory was 88.4MB in the beginning and 78.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 135]: 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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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 d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 15:49:40,908 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 15:49:40,983 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-12-02 15:49:40,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 15:49:40,990 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 15:49:41,019 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 15:49:41,020 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 15:49:41,020 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 15:49:41,021 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 15:49:41,021 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 15:49:41,022 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 15:49:41,022 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 15:49:41,023 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 15:49:41,023 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 15:49:41,024 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 15:49:41,025 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 15:49:41,025 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-02 15:49:41,026 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-02 15:49:41,027 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 15:49:41,027 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 15:49:41,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 15:49:41,028 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 15:49:41,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 15:49:41,029 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-12-02 15:49:41,030 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-12-02 15:49:41,030 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-12-02 15:49:41,031 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 15:49:41,031 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 15:49:41,031 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 15:49:41,032 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 15:49:41,032 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 15:49:41,033 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 15:49:41,033 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 15:49:41,033 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 15:49:41,034 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 15:49:41,034 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 15:49:41,034 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 15:49:41,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:49:41,035 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 15:49:41,035 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 15:49:41,035 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 15:49:41,035 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 15:49:41,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 15:49:41,036 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 15:49:41,036 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 15:49:41,036 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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d2c89f010e0f73e8ba7e81bb150b82b70d39c0827c0d616dd2c3347839d51e01 [2023-12-02 15:49:41,340 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 15:49:41,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 15:49:41,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 15:49:41,364 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 15:49:41,365 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 15:49:41,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-12-02 15:49:44,102 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 15:49:44,313 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 15:49:44,314 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/sv-benchmarks/c/weaver/popl20-queue-add-3.wvr.c [2023-12-02 15:49:44,322 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data/19ee8279c/e0c2fe74980a45c2bc92d7ea85c16d38/FLAG34f909f30 [2023-12-02 15:49:44,335 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/data/19ee8279c/e0c2fe74980a45c2bc92d7ea85c16d38 [2023-12-02 15:49:44,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 15:49:44,339 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 15:49:44,340 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 15:49:44,340 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 15:49:44,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 15:49:44,345 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b8afb5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44, skipping insertion in model container [2023-12-02 15:49:44,346 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,370 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:49:44,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:49:44,554 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-12-02 15:49:44,559 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 15:49:44,583 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:49:44,589 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 15:49:44,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 15:49:44,629 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 15:49:44,629 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-02 15:49:44,635 INFO L206 MainTranslator]: Completed translation [2023-12-02 15:49:44,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44 WrapperNode [2023-12-02 15:49:44,636 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 15:49:44,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 15:49:44,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 15:49:44,637 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 15:49:44,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,654 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,684 INFO L138 Inliner]: procedures = 27, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 252 [2023-12-02 15:49:44,684 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 15:49:44,685 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 15:49:44,685 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 15:49:44,686 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 15:49:44,693 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,718 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,723 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,726 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,728 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,733 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 15:49:44,734 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 15:49:44,734 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 15:49:44,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 15:49:44,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (1/1) ... [2023-12-02 15:49:44,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 15:49:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:49:44,760 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 15:49:44,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 15:49:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 15:49:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 15:49:44,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-02 15:49:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-12-02 15:49:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-12-02 15:49:44,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-12-02 15:49:44,805 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-12-02 15:49:44,805 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-12-02 15:49:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-12-02 15:49:44,806 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-12-02 15:49:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-02 15:49:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-02 15:49:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-02 15:49:44,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 15:49:44,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 15:49:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-02 15:49:44,807 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-12-02 15:49:44,809 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-02 15:49:44,922 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 15:49:44,924 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 15:49:45,496 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 15:49:45,821 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 15:49:45,821 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-12-02 15:49:45,821 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:49:45 BoogieIcfgContainer [2023-12-02 15:49:45,821 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 15:49:45,824 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 15:49:45,824 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 15:49:45,827 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 15:49:45,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 03:49:44" (1/3) ... [2023-12-02 15:49:45,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283b01d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:49:45, skipping insertion in model container [2023-12-02 15:49:45,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 03:49:44" (2/3) ... [2023-12-02 15:49:45,828 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283b01d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 03:49:45, skipping insertion in model container [2023-12-02 15:49:45,828 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 03:49:45" (3/3) ... [2023-12-02 15:49:45,829 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-3.wvr.c [2023-12-02 15:49:45,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 15:49:45,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-12-02 15:49:45,845 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-02 15:49:45,932 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-12-02 15:49:45,960 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 82 transitions, 185 flow [2023-12-02 15:49:46,289 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7258 states, 6930 states have (on average 3.9988455988455986) internal successors, (27712), 7257 states have internal predecessors, (27712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:46,332 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 15:49:46,339 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;@5725fbbf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 15:49:46,339 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-12-02 15:49:46,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 7258 states, 6930 states have (on average 3.9988455988455986) internal successors, (27712), 7257 states have internal predecessors, (27712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:46,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 15:49:46,371 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:46,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 15:49:46,372 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:46,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:46,378 INFO L85 PathProgramCache]: Analyzing trace with hash 762881, now seen corresponding path program 1 times [2023-12-02 15:49:46,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:46,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177398926] [2023-12-02 15:49:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:46,391 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 15:49:46,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:46,394 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:46,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:46,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 15:49:46,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:46,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:49:46,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:49:46,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:49:46,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:46,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:49:46,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:49:46,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,688 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:46,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:49:46,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,719 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:46,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:49:46,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:46,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:46,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-12-02 15:49:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:46,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:46,902 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 15:49:46,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:49:46,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:49:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177398926] [2023-12-02 15:49:46,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177398926] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:46,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:46,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:49:46,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403440687] [2023-12-02 15:49:46,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:46,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:46,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:49:46,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:46,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:46,962 INFO L87 Difference]: Start difference. First operand has 7258 states, 6930 states have (on average 3.9988455988455986) internal successors, (27712), 7257 states have internal predecessors, (27712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:47,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:47,380 INFO L93 Difference]: Finished difference Result 7254 states and 26388 transitions. [2023-12-02 15:49:47,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:47,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 15:49:47,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:47,497 INFO L225 Difference]: With dead ends: 7254 [2023-12-02 15:49:47,497 INFO L226 Difference]: Without dead ends: 7254 [2023-12-02 15:49:47,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:47,502 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:47,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:49:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7254 states. [2023-12-02 15:49:47,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 7254. [2023-12-02 15:49:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7254 states, 6929 states have (on average 3.808341752056574) internal successors, (26388), 7253 states have internal predecessors, (26388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:48,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7254 states to 7254 states and 26388 transitions. [2023-12-02 15:49:48,001 INFO L78 Accepts]: Start accepts. Automaton has 7254 states and 26388 transitions. Word has length 3 [2023-12-02 15:49:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:48,002 INFO L495 AbstractCegarLoop]: Abstraction has 7254 states and 26388 transitions. [2023-12-02 15:49:48,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:48,002 INFO L276 IsEmpty]: Start isEmpty. Operand 7254 states and 26388 transitions. [2023-12-02 15:49:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-12-02 15:49:48,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:48,003 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-12-02 15:49:48,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:48,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:48,205 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:48,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:48,205 INFO L85 PathProgramCache]: Analyzing trace with hash 762882, now seen corresponding path program 1 times [2023-12-02 15:49:48,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:48,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937823557] [2023-12-02 15:49:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:48,206 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 15:49:48,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:48,207 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:48,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:48,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:48,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:49:48,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:48,300 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 13 treesize of output 7 [2023-12-02 15:49:48,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:48,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:48,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:49:48,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:48,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,448 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 8 treesize of output 1 [2023-12-02 15:49:48,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,477 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 8 treesize of output 1 [2023-12-02 15:49:48,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,500 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:48,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,523 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 8 treesize of output 1 [2023-12-02 15:49:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:48,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,584 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 8 treesize of output 1 [2023-12-02 15:49:48,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,605 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 8 treesize of output 1 [2023-12-02 15:49:48,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:48,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:48,656 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 8 treesize of output 1 [2023-12-02 15:49:48,732 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 15:49:48,733 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:49:48,733 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:49:48,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937823557] [2023-12-02 15:49:48,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937823557] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:48,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:48,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:49:48,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917791618] [2023-12-02 15:49:48,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:48,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:49:48,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:49:48,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:49:48,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:49:48,747 INFO L87 Difference]: Start difference. First operand 7254 states and 26388 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:49,422 INFO L93 Difference]: Finished difference Result 7258 states and 26394 transitions. [2023-12-02 15:49:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:49:49,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-12-02 15:49:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:49,518 INFO L225 Difference]: With dead ends: 7258 [2023-12-02 15:49:49,518 INFO L226 Difference]: Without dead ends: 7258 [2023-12-02 15:49:49,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 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 15:49:49,519 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:49,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:49:49,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2023-12-02 15:49:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 7258. [2023-12-02 15:49:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 6933 states have (on average 3.807009952401558) internal successors, (26394), 7257 states have internal predecessors, (26394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 26394 transitions. [2023-12-02 15:49:49,891 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 26394 transitions. Word has length 3 [2023-12-02 15:49:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:49,891 INFO L495 AbstractCegarLoop]: Abstraction has 7258 states and 26394 transitions. [2023-12-02 15:49:49,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:49,891 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 26394 transitions. [2023-12-02 15:49:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 15:49:49,892 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:49,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 15:49:49,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:50,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:50,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:50,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:50,093 INFO L85 PathProgramCache]: Analyzing trace with hash 23650792, now seen corresponding path program 1 times [2023-12-02 15:49:50,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:50,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1403879780] [2023-12-02 15:49:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:50,094 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 15:49:50,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:50,095 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:50,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:50,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:50,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:49:50,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:50,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:50,266 INFO L349 Elim1Store]: treesize reduction 42, result has 26.3 percent of original size [2023-12-02 15:49:50,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 36 [2023-12-02 15:49:50,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:50,371 INFO L349 Elim1Store]: treesize reduction 82, result has 15.5 percent of original size [2023-12-02 15:49:50,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 40 [2023-12-02 15:49:50,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:50,897 INFO L349 Elim1Store]: treesize reduction 148, result has 36.5 percent of original size [2023-12-02 15:49:50,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 83 treesize of output 161 [2023-12-02 15:49:52,385 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 15:49:52,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:49:52,386 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:49:52,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1403879780] [2023-12-02 15:49:52,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1403879780] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:52,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:52,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:49:52,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825786410] [2023-12-02 15:49:52,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:52,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:49:52,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:49:52,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:49:52,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:49:52,387 INFO L87 Difference]: Start difference. First operand 7258 states and 26394 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:53,174 INFO L93 Difference]: Finished difference Result 6069 states and 21641 transitions. [2023-12-02 15:49:53,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:53,176 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 15:49:53,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:53,203 INFO L225 Difference]: With dead ends: 6069 [2023-12-02 15:49:53,203 INFO L226 Difference]: Without dead ends: 6069 [2023-12-02 15:49:53,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 15:49:53,204 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:53,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 18 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:49:53,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2023-12-02 15:49:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 6069. [2023-12-02 15:49:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 5820 states have (on average 3.718384879725086) internal successors, (21641), 6068 states have internal predecessors, (21641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:53,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 21641 transitions. [2023-12-02 15:49:53,391 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 21641 transitions. Word has length 4 [2023-12-02 15:49:53,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:53,391 INFO L495 AbstractCegarLoop]: Abstraction has 6069 states and 21641 transitions. [2023-12-02 15:49:53,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:53,391 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 21641 transitions. [2023-12-02 15:49:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 15:49:53,391 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:53,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 15:49:53,394 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-12-02 15:49:53,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:53,592 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:53,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:53,593 INFO L85 PathProgramCache]: Analyzing trace with hash 23650793, now seen corresponding path program 1 times [2023-12-02 15:49:53,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:53,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090677576] [2023-12-02 15:49:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:53,594 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 15:49:53,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:53,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:53,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:53,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:49:53,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:53,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 15:49:53,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,735 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 15 treesize of output 11 [2023-12-02 15:49:53,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:53,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,781 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:49:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-12-02 15:49:53,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:49:53,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:49:53,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:53,911 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 15:49:53,965 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 15:49:53,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:49:53,965 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:49:53,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090677576] [2023-12-02 15:49:53,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090677576] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:53,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:53,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:49:53,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469399157] [2023-12-02 15:49:53,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:53,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:49:53,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:49:53,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:49:53,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:49:53,967 INFO L87 Difference]: Start difference. First operand 6069 states and 21641 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:54,224 INFO L93 Difference]: Finished difference Result 4880 states and 16888 transitions. [2023-12-02 15:49:54,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-12-02 15:49:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:54,256 INFO L225 Difference]: With dead ends: 4880 [2023-12-02 15:49:54,256 INFO L226 Difference]: Without dead ends: 4880 [2023-12-02 15:49:54,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:49:54,257 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:54,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 16 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:49:54,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2023-12-02 15:49:54,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4880. [2023-12-02 15:49:54,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4880 states, 4707 states have (on average 3.5878478861270446) internal successors, (16888), 4879 states have internal predecessors, (16888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:54,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 16888 transitions. [2023-12-02 15:49:54,436 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 16888 transitions. Word has length 4 [2023-12-02 15:49:54,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:54,437 INFO L495 AbstractCegarLoop]: Abstraction has 4880 states and 16888 transitions. [2023-12-02 15:49:54,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:54,437 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 16888 transitions. [2023-12-02 15:49:54,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 15:49:54,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:54,437 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-12-02 15:49:54,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:54,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:54,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:54,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:54,639 INFO L85 PathProgramCache]: Analyzing trace with hash 733154436, now seen corresponding path program 1 times [2023-12-02 15:49:54,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:54,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1231391680] [2023-12-02 15:49:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:54,639 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 15:49:54,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:54,640 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:54,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:54,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:49:54,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:54,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:49:54,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:49:54,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:54,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,896 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 8 treesize of output 1 [2023-12-02 15:49:54,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,904 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 8 treesize of output 1 [2023-12-02 15:49:54,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,925 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 8 treesize of output 1 [2023-12-02 15:49:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:54,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,958 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 8 treesize of output 1 [2023-12-02 15:49:54,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,982 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 8 treesize of output 1 [2023-12-02 15:49:54,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:54,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,031 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 8 treesize of output 1 [2023-12-02 15:49:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:49:55,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:49:55,505 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:49:55,505 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:49:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1231391680] [2023-12-02 15:49:55,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1231391680] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:49:55,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [491584775] [2023-12-02 15:49:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:55,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:49:55,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:49:55,520 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:49:55,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-12-02 15:49:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:55,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:49:55,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:55,634 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 13 treesize of output 7 [2023-12-02 15:49:55,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,643 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 8 treesize of output 1 [2023-12-02 15:49:55,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,676 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 8 treesize of output 1 [2023-12-02 15:49:55,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:49:55,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,796 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 8 treesize of output 1 [2023-12-02 15:49:55,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,802 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 8 treesize of output 1 [2023-12-02 15:49:55,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,844 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,865 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 8 treesize of output 1 [2023-12-02 15:49:55,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,879 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 8 treesize of output 1 [2023-12-02 15:49:55,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:55,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:49:55,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:49:56,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:49:56,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [491584775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:49:56,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755681443] [2023-12-02 15:49:56,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:56,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:49:56,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:49:56,047 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:49:56,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 15:49:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:56,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:49:56,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:56,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:49:56,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:49:56,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:56,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,240 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 8 treesize of output 1 [2023-12-02 15:49:56,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,256 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 8 treesize of output 1 [2023-12-02 15:49:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:56,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,300 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 8 treesize of output 1 [2023-12-02 15:49:56,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,316 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,322 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 8 treesize of output 1 [2023-12-02 15:49:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:56,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,353 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 8 treesize of output 1 [2023-12-02 15:49:56,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,375 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 8 treesize of output 1 [2023-12-02 15:49:56,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:49:56,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:56,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:49:56,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:49:56,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:49:56,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:49:56,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755681443] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:49:56,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:49:56,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-12-02 15:49:56,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676204990] [2023-12-02 15:49:56,551 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:49:56,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:49:56,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:49:56,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:49:56,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:49:56,552 INFO L87 Difference]: Start difference. First operand 4880 states and 16888 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:58,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:58,198 INFO L93 Difference]: Finished difference Result 4892 states and 16906 transitions. [2023-12-02 15:49:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:49:58,199 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-12-02 15:49:58,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:58,221 INFO L225 Difference]: With dead ends: 4892 [2023-12-02 15:49:58,221 INFO L226 Difference]: Without dead ends: 4892 [2023-12-02 15:49:58,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:49:58,222 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:58,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 76 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 15:49:58,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2023-12-02 15:49:58,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4892. [2023-12-02 15:49:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4892 states, 4719 states have (on average 3.582538673447764) internal successors, (16906), 4891 states have internal predecessors, (16906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:58,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4892 states to 4892 states and 16906 transitions. [2023-12-02 15:49:58,435 INFO L78 Accepts]: Start accepts. Automaton has 4892 states and 16906 transitions. Word has length 5 [2023-12-02 15:49:58,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:58,436 INFO L495 AbstractCegarLoop]: Abstraction has 4892 states and 16906 transitions. [2023-12-02 15:49:58,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:58,436 INFO L276 IsEmpty]: Start isEmpty. Operand 4892 states and 16906 transitions. [2023-12-02 15:49:58,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:49:58,437 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:58,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:58,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-12-02 15:49:58,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:58,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 15:49:59,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:49:59,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:59,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:59,040 INFO L85 PathProgramCache]: Analyzing trace with hash 206885826, now seen corresponding path program 1 times [2023-12-02 15:49:59,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:59,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [931908911] [2023-12-02 15:49:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:49:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:59,041 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:59,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:49:59,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 15:49:59,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:49:59,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,164 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-12-02 15:49:59,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 15:49:59,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2023-12-02 15:49:59,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,223 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-12-02 15:49:59,223 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 1 case distinctions, treesize of input 26 treesize of output 15 [2023-12-02 15:49:59,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,243 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 17 treesize of output 11 [2023-12-02 15:49:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,277 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-12-02 15:49:59,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-12-02 15:49:59,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,300 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 15 treesize of output 11 [2023-12-02 15:49:59,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,324 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 15 treesize of output 11 [2023-12-02 15:49:59,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:49:59,358 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-12-02 15:49:59,358 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 1 case distinctions, treesize of input 26 treesize of output 15 [2023-12-02 15:49:59,394 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:49:59,394 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 15:49:59,439 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 15:49:59,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:49:59,440 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:49:59,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [931908911] [2023-12-02 15:49:59,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [931908911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:49:59,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:49:59,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:49:59,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921791961] [2023-12-02 15:49:59,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:49:59,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:49:59,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:49:59,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:49:59,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:59,441 INFO L87 Difference]: Start difference. First operand 4892 states and 16906 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:49:59,658 INFO L93 Difference]: Finished difference Result 4773 states and 16560 transitions. [2023-12-02 15:49:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:49:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 15:49:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:49:59,674 INFO L225 Difference]: With dead ends: 4773 [2023-12-02 15:49:59,674 INFO L226 Difference]: Without dead ends: 4773 [2023-12-02 15:49:59,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:49:59,675 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:49:59,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:49:59,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2023-12-02 15:49:59,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4773. [2023-12-02 15:49:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 4620 states have (on average 3.5844155844155843) internal successors, (16560), 4772 states have internal predecessors, (16560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 16560 transitions. [2023-12-02 15:49:59,779 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 16560 transitions. Word has length 7 [2023-12-02 15:49:59,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:49:59,780 INFO L495 AbstractCegarLoop]: Abstraction has 4773 states and 16560 transitions. [2023-12-02 15:49:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:49:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 16560 transitions. [2023-12-02 15:49:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 15:49:59,780 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:49:59,780 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:49:59,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-12-02 15:49:59,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:59,981 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:49:59,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:49:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash 206885827, now seen corresponding path program 1 times [2023-12-02 15:49:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:49:59,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482546929] [2023-12-02 15:49:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:49:59,982 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 15:49:59,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:49:59,983 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:49:59,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-12-02 15:50:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:00,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:50:00,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:00,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-12-02 15:50:00,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,098 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 10 treesize of output 8 [2023-12-02 15:50:00,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:00,126 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:00,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,220 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:00,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-12-02 15:50:00,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:00,288 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 15:50:00,366 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 15:50:00,367 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:00,367 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482546929] [2023-12-02 15:50:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482546929] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:00,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:00,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:50:00,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098828211] [2023-12-02 15:50:00,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:00,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:00,368 INFO L87 Difference]: Start difference. First operand 4773 states and 16560 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:00,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:00,596 INFO L93 Difference]: Finished difference Result 4654 states and 16214 transitions. [2023-12-02 15:50:00,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:00,597 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 15:50:00,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:00,610 INFO L225 Difference]: With dead ends: 4654 [2023-12-02 15:50:00,610 INFO L226 Difference]: Without dead ends: 4654 [2023-12-02 15:50:00,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:00,611 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:00,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 14 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:00,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2023-12-02 15:50:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654. [2023-12-02 15:50:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4521 states have (on average 3.586374695863747) internal successors, (16214), 4653 states have internal predecessors, (16214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 16214 transitions. [2023-12-02 15:50:00,773 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 16214 transitions. Word has length 7 [2023-12-02 15:50:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:00,773 INFO L495 AbstractCegarLoop]: Abstraction has 4654 states and 16214 transitions. [2023-12-02 15:50:00,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:00,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 16214 transitions. [2023-12-02 15:50:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 15:50:00,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:00,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:00,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:50:00,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:00,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:00,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:00,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2118509191, now seen corresponding path program 1 times [2023-12-02 15:50:00,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:00,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [609759272] [2023-12-02 15:50:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:00,976 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 15:50:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:00,977 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:00,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-12-02 15:50:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:01,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:50:01,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:01,121 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 15:50:01,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:01,121 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:01,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [609759272] [2023-12-02 15:50:01,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [609759272] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:01,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:01,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:50:01,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293306582] [2023-12-02 15:50:01,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:01,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:01,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:01,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:01,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:01,123 INFO L87 Difference]: Start difference. First operand 4654 states and 16214 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:01,480 INFO L93 Difference]: Finished difference Result 5063 states and 17397 transitions. [2023-12-02 15:50:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:50:01,480 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 15:50:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:01,508 INFO L225 Difference]: With dead ends: 5063 [2023-12-02 15:50:01,508 INFO L226 Difference]: Without dead ends: 4991 [2023-12-02 15:50:01,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 15:50:01,508 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:01,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:50:01,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2023-12-02 15:50:01,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4990. [2023-12-02 15:50:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4849 states have (on average 3.541967415962054) internal successors, (17175), 4989 states have internal predecessors, (17175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 17175 transitions. [2023-12-02 15:50:01,684 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 17175 transitions. Word has length 8 [2023-12-02 15:50:01,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:01,685 INFO L495 AbstractCegarLoop]: Abstraction has 4990 states and 17175 transitions. [2023-12-02 15:50:01,685 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 17175 transitions. [2023-12-02 15:50:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:50:01,686 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:01,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:01,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2023-12-02 15:50:01,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:01,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:01,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -657097915, now seen corresponding path program 1 times [2023-12-02 15:50:01,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:01,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1379712514] [2023-12-02 15:50:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:01,888 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 15:50:01,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:01,889 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:01,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:01,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 15:50:01,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:02,014 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 13 treesize of output 7 [2023-12-02 15:50:02,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:50:02,035 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 15:50:02,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,045 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 8 treesize of output 1 [2023-12-02 15:50:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:02,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,101 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 15:50:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,111 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 8 treesize of output 1 [2023-12-02 15:50:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,133 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 15:50:02,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,144 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 8 treesize of output 1 [2023-12-02 15:50:02,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,202 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 15:50:02,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,213 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 8 treesize of output 1 [2023-12-02 15:50:02,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:02,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:02,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:02,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:02,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,363 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 15:50:02,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,372 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 8 treesize of output 1 [2023-12-02 15:50:02,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:02,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:02,430 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 15:50:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,440 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 8 treesize of output 1 [2023-12-02 15:50:02,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:02,592 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 11 [2023-12-02 15:50:02,607 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 15:50:02,607 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 15:50:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:02,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:03,647 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1379712514] [2023-12-02 15:50:03,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1379712514] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:03,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [804904572] [2023-12-02 15:50:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:03,648 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:50:03,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:50:03,649 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:50:03,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-12-02 15:50:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:03,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:50:03,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:03,835 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 13 treesize of output 7 [2023-12-02 15:50:03,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:50:03,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:03,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:03,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:03,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:03,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:03,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:03,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:03,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:03,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:04,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:04,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:04,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,043 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:04,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:04,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:04,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,106 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:04,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:04,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,142 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 8 treesize of output 7 [2023-12-02 15:50:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:04,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,187 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:04,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:04,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:04,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:04,426 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 11 [2023-12-02 15:50:04,467 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 15:50:04,468 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 15:50:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:04,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:06,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [804904572] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:06,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897041674] [2023-12-02 15:50:06,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:06,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:06,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:06,667 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:06,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 15:50:06,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:06,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:50:06,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:06,775 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 13 treesize of output 7 [2023-12-02 15:50:06,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:50:06,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:06,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:06,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:06,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,833 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:06,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:06,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:06,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:06,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:06,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:06,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:06,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:06,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:06,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:07,000 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:07,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:07,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:07,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:07,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:07,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:07,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:07,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:07,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:07,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:07,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:07,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:07,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:07,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:07,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:07,241 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 11 [2023-12-02 15:50:07,256 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 15:50:07,257 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 15:50:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:07,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:08,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897041674] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:08,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:50:08,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2023-12-02 15:50:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293889591] [2023-12-02 15:50:08,718 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:50:08,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-02 15:50:08,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:08,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-02 15:50:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:50:08,719 INFO L87 Difference]: Start difference. First operand 4990 states and 17175 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:11,053 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-12-02 15:50:19,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:19,184 INFO L93 Difference]: Finished difference Result 12096 states and 41859 transitions. [2023-12-02 15:50:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 15:50:19,186 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:50:19,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:19,234 INFO L225 Difference]: With dead ends: 12096 [2023-12-02 15:50:19,235 INFO L226 Difference]: Without dead ends: 12096 [2023-12-02 15:50:19,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:50:19,236 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:19,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 116 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2023-12-02 15:50:19,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12096 states. [2023-12-02 15:50:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12096 to 7719. [2023-12-02 15:50:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7719 states, 7578 states have (on average 3.673660596463447) internal successors, (27839), 7718 states have internal predecessors, (27839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:19,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7719 states to 7719 states and 27839 transitions. [2023-12-02 15:50:19,494 INFO L78 Accepts]: Start accepts. Automaton has 7719 states and 27839 transitions. Word has length 10 [2023-12-02 15:50:19,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:19,494 INFO L495 AbstractCegarLoop]: Abstraction has 7719 states and 27839 transitions. [2023-12-02 15:50:19,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:19,494 INFO L276 IsEmpty]: Start isEmpty. Operand 7719 states and 27839 transitions. [2023-12-02 15:50:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:50:19,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:19,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:19,501 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 15:50:19,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:19,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2023-12-02 15:50:20,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:50:20,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:20,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:20,100 INFO L85 PathProgramCache]: Analyzing trace with hash -657097916, now seen corresponding path program 1 times [2023-12-02 15:50:20,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:20,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821616446] [2023-12-02 15:50:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:20,100 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:50:20,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:20,101 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:20,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-12-02 15:50:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:20,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:50:20,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:20,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-02 15:50:20,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:20,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:20,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:20,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:20,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:20,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,338 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 1 [2023-12-02 15:50:20,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:20,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:20,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-12-02 15:50:20,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:20,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-12-02 15:50:20,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:20,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:20,449 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:50:20,450 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 15:50:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:20,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:20,490 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:20,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821616446] [2023-12-02 15:50:20,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821616446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:20,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:20,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:50:20,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756184278] [2023-12-02 15:50:20,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:20,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:20,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:20,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:20,491 INFO L87 Difference]: Start difference. First operand 7719 states and 27839 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:20,778 INFO L93 Difference]: Finished difference Result 6080 states and 21335 transitions. [2023-12-02 15:50:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 15:50:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:50:20,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:20,795 INFO L225 Difference]: With dead ends: 6080 [2023-12-02 15:50:20,795 INFO L226 Difference]: Without dead ends: 6080 [2023-12-02 15:50:20,795 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 15:50:20,796 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:20,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 28 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2023-12-02 15:50:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 6080. [2023-12-02 15:50:20,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 6004 states have (on average 3.5534643570952698) internal successors, (21335), 6079 states have internal predecessors, (21335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:20,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 21335 transitions. [2023-12-02 15:50:20,913 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 21335 transitions. Word has length 10 [2023-12-02 15:50:20,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:20,913 INFO L495 AbstractCegarLoop]: Abstraction has 6080 states and 21335 transitions. [2023-12-02 15:50:20,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:20,913 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 21335 transitions. [2023-12-02 15:50:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:50:20,914 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:20,914 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:20,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-12-02 15:50:21,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:21,115 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:21,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:21,115 INFO L85 PathProgramCache]: Analyzing trace with hash 58352469, now seen corresponding path program 1 times [2023-12-02 15:50:21,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:21,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1585378769] [2023-12-02 15:50:21,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:21,116 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 15:50:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:21,117 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:21,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:21,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 15:50:21,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:21,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,276 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-12-02 15:50:21,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-12-02 15:50:21,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,309 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-12-02 15:50:21,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,339 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-12-02 15:50:21,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,363 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-12-02 15:50:21,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,371 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,371 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 1 case distinctions, treesize of input 21 treesize of output 1 [2023-12-02 15:50:21,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,378 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,379 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 15:50:21,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,388 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,388 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 15:50:21,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,397 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,397 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 15:50:21,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,418 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 1 [2023-12-02 15:50:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,440 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-12-02 15:50:21,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,448 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,448 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 1 case distinctions, treesize of input 21 treesize of output 1 [2023-12-02 15:50:21,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:21,456 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-12-02 15:50:21,457 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 1 case distinctions, treesize of input 19 treesize of output 1 [2023-12-02 15:50:21,471 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-12-02 15:50:21,472 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 15:50:21,490 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 15:50:21,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:21,491 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:21,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1585378769] [2023-12-02 15:50:21,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1585378769] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:21,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:21,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:50:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15167906] [2023-12-02 15:50:21,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:21,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:50:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:21,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:50:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:21,492 INFO L87 Difference]: Start difference. First operand 6080 states and 21335 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:21,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:21,672 INFO L93 Difference]: Finished difference Result 5898 states and 20795 transitions. [2023-12-02 15:50:21,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:21,672 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:50:21,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:21,686 INFO L225 Difference]: With dead ends: 5898 [2023-12-02 15:50:21,686 INFO L226 Difference]: Without dead ends: 5898 [2023-12-02 15:50:21,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:21,687 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:21,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 14 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:21,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5898 states. [2023-12-02 15:50:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5898 to 5898. [2023-12-02 15:50:21,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5898 states, 5839 states have (on average 3.5613974995718447) internal successors, (20795), 5897 states have internal predecessors, (20795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5898 states to 5898 states and 20795 transitions. [2023-12-02 15:50:21,846 INFO L78 Accepts]: Start accepts. Automaton has 5898 states and 20795 transitions. Word has length 10 [2023-12-02 15:50:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:21,847 INFO L495 AbstractCegarLoop]: Abstraction has 5898 states and 20795 transitions. [2023-12-02 15:50:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 5898 states and 20795 transitions. [2023-12-02 15:50:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 15:50:21,848 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:21,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:21,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:50:22,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:22,052 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:22,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:22,052 INFO L85 PathProgramCache]: Analyzing trace with hash 58352470, now seen corresponding path program 1 times [2023-12-02 15:50:22,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:22,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1374157754] [2023-12-02 15:50:22,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:22,053 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 15:50:22,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:22,054 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:22,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-12-02 15:50:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:22,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:50:22,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:22,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-12-02 15:50:22,218 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 15:50:22,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,226 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,230 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,263 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:22,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,288 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,298 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,304 INFO L173 IndexEqualityManager]: detected equality via solver [2023-12-02 15:50:22,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-12-02 15:50:22,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:22,352 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 15:50:22,481 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 15:50:22,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:22,481 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:22,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1374157754] [2023-12-02 15:50:22,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1374157754] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:22,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:22,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:50:22,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162705734] [2023-12-02 15:50:22,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:22,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:22,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:22,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:22,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:22,483 INFO L87 Difference]: Start difference. First operand 5898 states and 20795 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:22,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:22,775 INFO L93 Difference]: Finished difference Result 5716 states and 20255 transitions. [2023-12-02 15:50:22,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:22,776 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 15:50:22,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:22,792 INFO L225 Difference]: With dead ends: 5716 [2023-12-02 15:50:22,792 INFO L226 Difference]: Without dead ends: 5716 [2023-12-02 15:50:22,792 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 15:50:22,792 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:22,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 12 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5716 states. [2023-12-02 15:50:22,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5716 to 5716. [2023-12-02 15:50:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5674 states have (on average 3.569792033838562) internal successors, (20255), 5715 states have internal predecessors, (20255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 20255 transitions. [2023-12-02 15:50:22,926 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 20255 transitions. Word has length 10 [2023-12-02 15:50:22,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:22,926 INFO L495 AbstractCegarLoop]: Abstraction has 5716 states and 20255 transitions. [2023-12-02 15:50:22,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 20255 transitions. [2023-12-02 15:50:22,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 15:50:22,927 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:22,928 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-12-02 15:50:22,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-12-02 15:50:23,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:23,129 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:23,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:23,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1017040118, now seen corresponding path program 2 times [2023-12-02 15:50:23,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:23,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028999849] [2023-12-02 15:50:23,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:50:23,130 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 15:50:23,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:23,131 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:23,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Waiting until timeout for monitored process [2023-12-02 15:50:23,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:50:23,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:50:23,207 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:50:23,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:23,218 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 13 treesize of output 7 [2023-12-02 15:50:23,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,228 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 8 treesize of output 1 [2023-12-02 15:50:23,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:23,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,260 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 8 treesize of output 1 [2023-12-02 15:50:23,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:23,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:23,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:23,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,382 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 8 treesize of output 1 [2023-12-02 15:50:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,398 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 8 treesize of output 1 [2023-12-02 15:50:23,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:23,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:23,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,471 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 8 treesize of output 1 [2023-12-02 15:50:23,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,478 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 8 treesize of output 1 [2023-12-02 15:50:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:23,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:23,742 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:23,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:24,488 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:24,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028999849] [2023-12-02 15:50:24,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028999849] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:24,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [933339204] [2023-12-02 15:50:24,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:50:24,489 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:50:24,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:50:24,490 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:50:24,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 15:50:24,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:50:24,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:50:24,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:50:24,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:24,709 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 13 treesize of output 7 [2023-12-02 15:50:24,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,718 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 8 treesize of output 1 [2023-12-02 15:50:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:24,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,754 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 8 treesize of output 1 [2023-12-02 15:50:24,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,771 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 8 treesize of output 1 [2023-12-02 15:50:24,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,787 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 8 treesize of output 1 [2023-12-02 15:50:24,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,796 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:24,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:24,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,871 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:24,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:24,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,927 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:24,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,949 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 8 treesize of output 1 [2023-12-02 15:50:24,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:24,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:24,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:24,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:25,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:25,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:25,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:25,013 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 8 treesize of output 1 [2023-12-02 15:50:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:25,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:26,204 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:26,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [933339204] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:26,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727104207] [2023-12-02 15:50:26,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:50:26,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:26,205 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:26,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 15:50:26,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:50:26,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:50:26,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:50:26,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:26,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:50:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:26,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:26,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,441 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 8 treesize of output 1 [2023-12-02 15:50:26,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,448 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 8 treesize of output 1 [2023-12-02 15:50:26,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:26,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,508 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:26,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,525 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 8 treesize of output 1 [2023-12-02 15:50:26,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,542 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 8 treesize of output 1 [2023-12-02 15:50:26,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,560 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 8 treesize of output 1 [2023-12-02 15:50:26,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,586 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 8 treesize of output 1 [2023-12-02 15:50:26,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:26,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:26,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:26,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:27,068 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:50:27,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727104207] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:27,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:50:27,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2023-12-02 15:50:27,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449309459] [2023-12-02 15:50:27,069 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:50:27,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 15:50:27,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:27,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 15:50:27,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:50:27,070 INFO L87 Difference]: Start difference. First operand 5716 states and 20255 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:32,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:34,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:35,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:37,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:39,093 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:42,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:43,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:44,634 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:47,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:50:48,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:48,321 INFO L93 Difference]: Finished difference Result 5752 states and 20309 transitions. [2023-12-02 15:50:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 15:50:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 15:50:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:48,336 INFO L225 Difference]: With dead ends: 5752 [2023-12-02 15:50:48,336 INFO L226 Difference]: Without dead ends: 5752 [2023-12-02 15:50:48,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=394, Invalid=866, Unknown=0, NotChecked=0, Total=1260 [2023-12-02 15:50:48,337 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 89 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:48,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 128 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 631 Invalid, 4 Unknown, 0 Unchecked, 18.3s Time] [2023-12-02 15:50:48,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5752 states. [2023-12-02 15:50:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5752 to 5752. [2023-12-02 15:50:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5752 states, 5710 states have (on average 3.5567425569176883) internal successors, (20309), 5751 states have internal predecessors, (20309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:48,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5752 states to 5752 states and 20309 transitions. [2023-12-02 15:50:48,441 INFO L78 Accepts]: Start accepts. Automaton has 5752 states and 20309 transitions. Word has length 11 [2023-12-02 15:50:48,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:48,441 INFO L495 AbstractCegarLoop]: Abstraction has 5752 states and 20309 transitions. [2023-12-02 15:50:48,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:48,441 INFO L276 IsEmpty]: Start isEmpty. Operand 5752 states and 20309 transitions. [2023-12-02 15:50:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:50:48,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:48,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:48,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 15:50:48,646 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-12-02 15:50:48,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Forceful destruction successful, exit code 0 [2023-12-02 15:50:49,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:49,044 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:49,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:49,044 INFO L85 PathProgramCache]: Analyzing trace with hash -233821581, now seen corresponding path program 1 times [2023-12-02 15:50:49,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:49,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2064364872] [2023-12-02 15:50:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:49,044 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 15:50:49,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:49,045 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:49,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-12-02 15:50:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:49,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:50:49,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:49,158 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:49,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:49,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2064364872] [2023-12-02 15:50:49,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2064364872] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:49,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:49,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:50:49,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304899068] [2023-12-02 15:50:49,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:49,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:50:49,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:50:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:49,159 INFO L87 Difference]: Start difference. First operand 5752 states and 20309 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:49,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:49,364 INFO L93 Difference]: Finished difference Result 6046 states and 21215 transitions. [2023-12-02 15:50:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:49,364 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 15:50:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:49,379 INFO L225 Difference]: With dead ends: 6046 [2023-12-02 15:50:49,379 INFO L226 Difference]: Without dead ends: 6046 [2023-12-02 15:50:49,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:49,379 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:49,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 37 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:49,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6046 states. [2023-12-02 15:50:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6046 to 6046. [2023-12-02 15:50:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 5998 states have (on average 3.537012337445815) internal successors, (21215), 6045 states have internal predecessors, (21215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 21215 transitions. [2023-12-02 15:50:49,488 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 21215 transitions. Word has length 14 [2023-12-02 15:50:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:49,488 INFO L495 AbstractCegarLoop]: Abstraction has 6046 states and 21215 transitions. [2023-12-02 15:50:49,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:49,488 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 21215 transitions. [2023-12-02 15:50:49,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:50:49,489 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:49,489 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:49,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-12-02 15:50:49,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:49,690 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:49,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash 800074569, now seen corresponding path program 1 times [2023-12-02 15:50:49,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:49,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389906091] [2023-12-02 15:50:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:49,690 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 15:50:49,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:49,691 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:49,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:49,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:50:49,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:49,774 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 15:50:49,802 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 15:50:49,802 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:49,802 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:49,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389906091] [2023-12-02 15:50:49,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389906091] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:49,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:49,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:50:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918937216] [2023-12-02 15:50:49,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:49,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:49,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:49,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:49,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:49,803 INFO L87 Difference]: Start difference. First operand 6046 states and 21215 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:50,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:50,043 INFO L93 Difference]: Finished difference Result 5098 states and 17707 transitions. [2023-12-02 15:50:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:50:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 15:50:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:50,055 INFO L225 Difference]: With dead ends: 5098 [2023-12-02 15:50:50,055 INFO L226 Difference]: Without dead ends: 5098 [2023-12-02 15:50:50,055 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 15:50:50,056 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:50,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5098 states. [2023-12-02 15:50:50,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5098 to 5098. [2023-12-02 15:50:50,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5098 states, 5072 states have (on average 3.491127760252366) internal successors, (17707), 5097 states have internal predecessors, (17707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:50,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5098 states to 5098 states and 17707 transitions. [2023-12-02 15:50:50,171 INFO L78 Accepts]: Start accepts. Automaton has 5098 states and 17707 transitions. Word has length 14 [2023-12-02 15:50:50,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:50,171 INFO L495 AbstractCegarLoop]: Abstraction has 5098 states and 17707 transitions. [2023-12-02 15:50:50,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:50,171 INFO L276 IsEmpty]: Start isEmpty. Operand 5098 states and 17707 transitions. [2023-12-02 15:50:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 15:50:50,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:50,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:50,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:50,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:50,373 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:50,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:50,374 INFO L85 PathProgramCache]: Analyzing trace with hash 800074570, now seen corresponding path program 1 times [2023-12-02 15:50:50,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:50,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [587118825] [2023-12-02 15:50:50,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:50,374 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 15:50:50,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:50,375 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:50,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-12-02 15:50:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:50,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 15:50:50,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:50,487 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 15:50:50,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:50,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:50,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [587118825] [2023-12-02 15:50:50,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [587118825] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:50,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:50,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 15:50:50,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533294603] [2023-12-02 15:50:50,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:50,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 15:50:50,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 15:50:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:50,488 INFO L87 Difference]: Start difference. First operand 5098 states and 17707 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:50,720 INFO L93 Difference]: Finished difference Result 5116 states and 17405 transitions. [2023-12-02 15:50:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 15:50:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 15:50:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:50,732 INFO L225 Difference]: With dead ends: 5116 [2023-12-02 15:50:50,732 INFO L226 Difference]: Without dead ends: 4958 [2023-12-02 15:50:50,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 15:50:50,733 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:50,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 36 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 15:50:50,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4958 states. [2023-12-02 15:50:50,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4958 to 4958. [2023-12-02 15:50:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4958 states, 4930 states have (on average 3.4460446247464502) internal successors, (16989), 4957 states have internal predecessors, (16989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4958 states to 4958 states and 16989 transitions. [2023-12-02 15:50:50,813 INFO L78 Accepts]: Start accepts. Automaton has 4958 states and 16989 transitions. Word has length 14 [2023-12-02 15:50:50,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:50,813 INFO L495 AbstractCegarLoop]: Abstraction has 4958 states and 16989 transitions. [2023-12-02 15:50:50,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:50,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4958 states and 16989 transitions. [2023-12-02 15:50:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-02 15:50:50,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:50,814 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:50,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-12-02 15:50:51,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:51,015 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:51,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1699186561, now seen corresponding path program 2 times [2023-12-02 15:50:51,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:51,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [471740917] [2023-12-02 15:50:51,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:50:51,016 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 15:50:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:51,017 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:51,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-12-02 15:50:51,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:50:51,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:50:51,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-02 15:50:51,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:51,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:50:51,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 7 [2023-12-02 15:50:51,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:51,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:51,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:51,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:51,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:51,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:51,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:51,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:51,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:51,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:51,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:51,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-12-02 15:50:51,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:51,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:50:51,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:51,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:50:51,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:50:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:50:51,652 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 11 [2023-12-02 15:50:51,664 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-12-02 15:50:51,664 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 15:50:51,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 15:50:51,720 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:51,720 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:51,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [471740917] [2023-12-02 15:50:51,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [471740917] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:51,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:51,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 15:50:51,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773988994] [2023-12-02 15:50:51,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:51,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:51,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:51,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:51,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:51,721 INFO L87 Difference]: Start difference. First operand 4958 states and 16989 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:51,995 INFO L93 Difference]: Finished difference Result 3977 states and 13629 transitions. [2023-12-02 15:50:51,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:50:51,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-02 15:50:51,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:52,004 INFO L225 Difference]: With dead ends: 3977 [2023-12-02 15:50:52,004 INFO L226 Difference]: Without dead ends: 3977 [2023-12-02 15:50:52,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 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 15:50:52,005 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:52,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 24 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:50:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3977 states. [2023-12-02 15:50:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3977 to 2157. [2023-12-02 15:50:52,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2150 states have (on average 3.337674418604651) internal successors, (7176), 2156 states have internal predecessors, (7176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:52,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 7176 transitions. [2023-12-02 15:50:52,048 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 7176 transitions. Word has length 16 [2023-12-02 15:50:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:52,048 INFO L495 AbstractCegarLoop]: Abstraction has 2157 states and 7176 transitions. [2023-12-02 15:50:52,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 7176 transitions. [2023-12-02 15:50:52,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-12-02 15:50:52,049 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:52,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:52,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-12-02 15:50:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:52,250 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:52,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1705879000, now seen corresponding path program 1 times [2023-12-02 15:50:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:52,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1861796610] [2023-12-02 15:50:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:52,251 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 15:50:52,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:52,252 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:52,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:52,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:52,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:50:52,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:52,423 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:50:52,424 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:52,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1861796610] [2023-12-02 15:50:52,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1861796610] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:50:52,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:50:52,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:50:52,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168396047] [2023-12-02 15:50:52,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:50:52,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:50:52,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:52,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:50:52,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:50:52,425 INFO L87 Difference]: Start difference. First operand 2157 states and 7176 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:52,722 INFO L93 Difference]: Finished difference Result 2657 states and 8648 transitions. [2023-12-02 15:50:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:50:52,723 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-12-02 15:50:52,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:52,727 INFO L225 Difference]: With dead ends: 2657 [2023-12-02 15:50:52,727 INFO L226 Difference]: Without dead ends: 2157 [2023-12-02 15:50:52,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 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 15:50:52,728 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:52,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 58 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:50:52,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2023-12-02 15:50:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2157. [2023-12-02 15:50:52,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2150 states have (on average 3.3372093023255816) internal successors, (7175), 2156 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 7175 transitions. [2023-12-02 15:50:52,765 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 7175 transitions. Word has length 17 [2023-12-02 15:50:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:52,765 INFO L495 AbstractCegarLoop]: Abstraction has 2157 states and 7175 transitions. [2023-12-02 15:50:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:52,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 7175 transitions. [2023-12-02 15:50:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 15:50:52,766 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:52,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:50:52,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:52,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:52,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:50:52,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:50:52,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1988313295, now seen corresponding path program 1 times [2023-12-02 15:50:52,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:50:52,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1983036529] [2023-12-02 15:50:52,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:52,968 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 15:50:52,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:50:52,969 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:50:52,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-12-02 15:50:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:53,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:50:53,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:53,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:53,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:53,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:54,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:54,277 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:50:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1983036529] [2023-12-02 15:50:54,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1983036529] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:54,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1254696862] [2023-12-02 15:50:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:54,278 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:50:54,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:50:54,278 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:50:54,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 15:50:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:54,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 15:50:54,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:54,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:54,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:55,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:55,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1254696862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:55,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764571568] [2023-12-02 15:50:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:50:55,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:50:55,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:50:55,761 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:50:55,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-02 15:50:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:50:55,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:50:55,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:50:55,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:50:56,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:56,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:50:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:50:56,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764571568] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:50:56,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:50:56,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5, 5, 5, 5] total 13 [2023-12-02 15:50:56,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601057635] [2023-12-02 15:50:56,715 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:50:56,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 15:50:56,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:50:56,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 15:50:56,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2023-12-02 15:50:56,716 INFO L87 Difference]: Start difference. First operand 2157 states and 7175 transitions. Second operand has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:50:59,428 INFO L93 Difference]: Finished difference Result 5515 states and 18477 transitions. [2023-12-02 15:50:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:50:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-02 15:50:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:50:59,439 INFO L225 Difference]: With dead ends: 5515 [2023-12-02 15:50:59,440 INFO L226 Difference]: Without dead ends: 5515 [2023-12-02 15:50:59,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-12-02 15:50:59,440 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:50:59,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 84 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-12-02 15:50:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5515 states. [2023-12-02 15:50:59,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5515 to 3743. [2023-12-02 15:50:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3743 states, 3736 states have (on average 3.3720556745182013) internal successors, (12598), 3742 states have internal predecessors, (12598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3743 states to 3743 states and 12598 transitions. [2023-12-02 15:50:59,509 INFO L78 Accepts]: Start accepts. Automaton has 3743 states and 12598 transitions. Word has length 19 [2023-12-02 15:50:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:50:59,509 INFO L495 AbstractCegarLoop]: Abstraction has 3743 states and 12598 transitions. [2023-12-02 15:50:59,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:50:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3743 states and 12598 transitions. [2023-12-02 15:50:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 15:50:59,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:50:59,510 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2023-12-02 15:50:59,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 15:50:59,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-12-02 15:50:59,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-12-02 15:51:00,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:51:00,111 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:51:00,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:51:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1121967817, now seen corresponding path program 1 times [2023-12-02 15:51:00,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:51:00,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223738086] [2023-12-02 15:51:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:51:00,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:51:00,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:51:00,113 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:51:00,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:51:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:51:00,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:51:00,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:51:00,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:51:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:00,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:51:02,829 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:02,830 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:51:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223738086] [2023-12-02 15:51:02,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223738086] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:51:02,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1931281088] [2023-12-02 15:51:02,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:51:02,830 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:51:02,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:51:02,831 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:51:02,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-12-02 15:51:03,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:51:03,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 15:51:03,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:51:03,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:51:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:03,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:51:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1931281088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:51:04,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524498953] [2023-12-02 15:51:04,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:51:04,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:51:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:51:04,514 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:51:04,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-12-02 15:51:04,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:51:04,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 15:51:04,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:51:04,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:51:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:04,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:51:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:05,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524498953] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:51:05,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:51:05,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12, 12, 11, 11] total 30 [2023-12-02 15:51:05,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678346306] [2023-12-02 15:51:05,442 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:51:05,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-02 15:51:05,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:51:05,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-02 15:51:05,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=688, Unknown=0, NotChecked=0, Total=930 [2023-12-02 15:51:05,444 INFO L87 Difference]: Start difference. First operand 3743 states and 12598 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:51:14,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:16,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:18,505 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:19,769 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:21,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:23,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:25,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:27,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:51:38,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:51:38,674 INFO L93 Difference]: Finished difference Result 3785 states and 12651 transitions. [2023-12-02 15:51:38,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-12-02 15:51:38,675 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 15:51:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:51:38,682 INFO L225 Difference]: With dead ends: 3785 [2023-12-02 15:51:38,683 INFO L226 Difference]: Without dead ends: 3785 [2023-12-02 15:51:38,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2023-12-02 15:51:38,684 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 48 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 69 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:51:38,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 188 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1233 Invalid, 7 Unknown, 0 Unchecked, 19.9s Time] [2023-12-02 15:51:38,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3785 states. [2023-12-02 15:51:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3785 to 3785. [2023-12-02 15:51:38,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3778 states have (on average 3.348597141344627) internal successors, (12651), 3784 states have internal predecessors, (12651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:51:38,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 12651 transitions. [2023-12-02 15:51:38,744 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 12651 transitions. Word has length 20 [2023-12-02 15:51:38,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:51:38,744 INFO L495 AbstractCegarLoop]: Abstraction has 3785 states and 12651 transitions. [2023-12-02 15:51:38,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 31 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:51:38,744 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 12651 transitions. [2023-12-02 15:51:38,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:51:38,747 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:51:38,747 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1] [2023-12-02 15:51:38,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-12-02 15:51:38,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:51:39,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2023-12-02 15:51:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:51:39,348 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:51:39,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:51:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1739095576, now seen corresponding path program 3 times [2023-12-02 15:51:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:51:39,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [217746556] [2023-12-02 15:51:39,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:51:39,349 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 15:51:39,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:51:39,350 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:51:39,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-12-02 15:51:39,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 15:51:39,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:51:39,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2023-12-02 15:51:39,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:51:39,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:51:39,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,699 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 8 treesize of output 1 [2023-12-02 15:51:39,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,713 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 8 treesize of output 1 [2023-12-02 15:51:39,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:51:39,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,818 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 8 treesize of output 1 [2023-12-02 15:51:39,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,844 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 8 treesize of output 1 [2023-12-02 15:51:39,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:39,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,891 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 8 treesize of output 1 [2023-12-02 15:51:39,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,925 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 8 treesize of output 1 [2023-12-02 15:51:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:39,934 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:40,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:51:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:44,694 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:51:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [217746556] [2023-12-02 15:51:44,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [217746556] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:51:44,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [603295324] [2023-12-02 15:51:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:51:44,694 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:51:44,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:51:44,695 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:51:44,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-12-02 15:51:45,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 15:51:45,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:51:45,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:51:45,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:51:45,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-02 15:51:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:45,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:45,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:51:45,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,794 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 8 treesize of output 1 [2023-12-02 15:51:45,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:45,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,845 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 8 treesize of output 1 [2023-12-02 15:51:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,853 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 8 treesize of output 1 [2023-12-02 15:51:45,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,869 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 8 treesize of output 1 [2023-12-02 15:51:45,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:45,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:45,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,942 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 8 treesize of output 1 [2023-12-02 15:51:45,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:45,967 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 8 treesize of output 1 [2023-12-02 15:51:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:46,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:51:51,010 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:51,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [603295324] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:51:51,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166609464] [2023-12-02 15:51:51,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:51:51,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:51:51,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:51:51,012 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:51:51,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-12-02 15:51:57,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-12-02 15:51:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:51:57,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 15:51:57,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:51:57,836 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 13 treesize of output 7 [2023-12-02 15:51:57,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,870 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 8 treesize of output 1 [2023-12-02 15:51:57,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:57,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,885 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 8 treesize of output 1 [2023-12-02 15:51:57,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,893 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 8 treesize of output 1 [2023-12-02 15:51:57,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:57,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,919 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 8 treesize of output 1 [2023-12-02 15:51:57,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:57,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:57,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:57,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:57,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:58,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,014 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:51:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:58,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,088 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 8 treesize of output 1 [2023-12-02 15:51:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,096 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 8 treesize of output 1 [2023-12-02 15:51:58,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:58,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:51:58,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:51:58,136 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:51:58,460 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:58,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:51:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:51:59,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166609464] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:51:59,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:51:59,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 37 [2023-12-02 15:51:59,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45135171] [2023-12-02 15:51:59,283 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:51:59,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-12-02 15:51:59,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:51:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-12-02 15:51:59,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:51:59,285 INFO L87 Difference]: Start difference. First operand 3785 states and 12651 transitions. Second operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:52:22,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:24,182 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:26,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:28,238 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:30,241 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:32,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:34,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:36,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:38,252 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:40,274 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:42,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:44,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:46,282 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:48,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:49,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:51,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:53,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:55,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:57,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:52:59,963 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:53:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:21,159 INFO L93 Difference]: Finished difference Result 3811 states and 12690 transitions. [2023-12-02 15:53:21,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-02 15:53:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 15:53:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:21,167 INFO L225 Difference]: With dead ends: 3811 [2023-12-02 15:53:21,168 INFO L226 Difference]: Without dead ends: 3811 [2023-12-02 15:53:21,169 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 40.8s TimeCoverageRelationStatistics Valid=1591, Invalid=3665, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 15:53:21,170 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 162 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 1792 mSolverCounterSat, 546 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 1792 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:21,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 248 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 1792 Invalid, 19 Unknown, 0 Unchecked, 48.3s Time] [2023-12-02 15:53:21,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3811 states. [2023-12-02 15:53:21,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3811 to 3811. [2023-12-02 15:53:21,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3811 states, 3804 states have (on average 3.3359621451104102) internal successors, (12690), 3810 states have internal predecessors, (12690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:53:21,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3811 states to 3811 states and 12690 transitions. [2023-12-02 15:53:21,226 INFO L78 Accepts]: Start accepts. Automaton has 3811 states and 12690 transitions. Word has length 25 [2023-12-02 15:53:21,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:21,226 INFO L495 AbstractCegarLoop]: Abstraction has 3811 states and 12690 transitions. [2023-12-02 15:53:21,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:53:21,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3811 states and 12690 transitions. [2023-12-02 15:53:21,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 15:53:21,229 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:21,230 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:53:21,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-12-02 15:53:21,433 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-12-02 15:53:21,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-12-02 15:53:21,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:21,831 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:53:21,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:21,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1412522564, now seen corresponding path program 2 times [2023-12-02 15:53:21,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:53:21,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1236178744] [2023-12-02 15:53:21,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:53:21,831 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:53:21,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:53:21,832 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:53:21,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:53:21,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:53:21,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:21,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 15:53:21,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:21,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:53:22,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-12-02 15:53:22,179 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:53:22,180 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:53:22,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1236178744] [2023-12-02 15:53:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1236178744] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:53:22,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:53:22,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 15:53:22,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896359607] [2023-12-02 15:53:22,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:53:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 15:53:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:53:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 15:53:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 15:53:22,181 INFO L87 Difference]: Start difference. First operand 3811 states and 12690 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:53:22,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:53:22,462 INFO L93 Difference]: Finished difference Result 3394 states and 11247 transitions. [2023-12-02 15:53:22,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 15:53:22,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-12-02 15:53:22,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:53:22,469 INFO L225 Difference]: With dead ends: 3394 [2023-12-02 15:53:22,469 INFO L226 Difference]: Without dead ends: 3394 [2023-12-02 15:53:22,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 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 15:53:22,470 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:53:22,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 25 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 15:53:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2023-12-02 15:53:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 1808. [2023-12-02 15:53:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1805 states have (on average 3.2265927977839337) internal successors, (5824), 1807 states have internal predecessors, (5824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:53:22,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 5824 transitions. [2023-12-02 15:53:22,505 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 5824 transitions. Word has length 25 [2023-12-02 15:53:22,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:53:22,505 INFO L495 AbstractCegarLoop]: Abstraction has 1808 states and 5824 transitions. [2023-12-02 15:53:22,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:53:22,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 5824 transitions. [2023-12-02 15:53:22,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-02 15:53:22,510 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:53:22,510 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 1, 1, 1] [2023-12-02 15:53:22,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:53:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:53:22,711 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:53:22,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:53:22,711 INFO L85 PathProgramCache]: Analyzing trace with hash -692628017, now seen corresponding path program 2 times [2023-12-02 15:53:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:53:22,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668434335] [2023-12-02 15:53:22,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:53:22,712 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:53:22,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:53:22,713 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:53:22,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-12-02 15:53:22,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:53:22,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:22,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 15:53:22,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:22,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:53:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:53:24,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:53:32,584 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:53:32,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668434335] [2023-12-02 15:53:32,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668434335] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:32,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2042904607] [2023-12-02 15:53:32,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:53:32,585 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:53:32,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:53:32,585 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:53:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 15:53:32,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:53:32,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:33,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-02 15:53:33,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:33,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:53:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:53:33,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:53:35,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2042904607] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:35,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204816299] [2023-12-02 15:53:35,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:53:35,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:53:35,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:53:35,186 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:53:35,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-12-02 15:53:35,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:53:35,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:53:35,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-02 15:53:35,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:53:35,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-12-02 15:53:35,887 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:53:35,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:53:37,594 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:53:37,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204816299] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:53:37,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:53:37,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21, 21, 21, 21] total 41 [2023-12-02 15:53:37,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645796172] [2023-12-02 15:53:37,594 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:53:37,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-02 15:53:37,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:53:37,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-02 15:53:37,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 15:53:37,596 INFO L87 Difference]: Start difference. First operand 1808 states and 5824 transitions. Second operand has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:54:00,311 WARN L293 SmtUtils]: Spent 11.56s on a formula simplification that was a NOOP. DAG size: 211 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:54:25,814 WARN L293 SmtUtils]: Spent 24.39s on a formula simplification. DAG size of input: 207 DAG size of output: 206 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:54:27,869 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 [] [2023-12-02 15:54:29,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:31,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:33,878 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:35,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:37,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:39,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:41,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:43,962 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:45,965 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:47,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:49,971 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:51,976 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:53,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:55,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:57,986 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:54:59,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:55:01,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 15:55:14,327 WARN L293 SmtUtils]: Spent 10.64s on a formula simplification that was a NOOP. DAG size: 200 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:55:34,282 WARN L293 SmtUtils]: Spent 18.86s on a formula simplification. DAG size of input: 196 DAG size of output: 195 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:55:45,167 WARN L293 SmtUtils]: Spent 9.77s on a formula simplification that was a NOOP. DAG size: 189 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:05,548 WARN L293 SmtUtils]: Spent 19.39s on a formula simplification. DAG size of input: 185 DAG size of output: 184 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:13,621 WARN L293 SmtUtils]: Spent 7.22s on a formula simplification that was a NOOP. DAG size: 179 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:30,022 WARN L293 SmtUtils]: Spent 15.47s on a formula simplification. DAG size of input: 175 DAG size of output: 174 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:36,716 WARN L293 SmtUtils]: Spent 5.79s on a formula simplification that was a NOOP. DAG size: 168 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:48,504 WARN L293 SmtUtils]: Spent 10.75s on a formula simplification. DAG size of input: 164 DAG size of output: 163 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:56:54,464 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:57:04,850 WARN L293 SmtUtils]: Spent 9.19s on a formula simplification. DAG size of input: 153 DAG size of output: 152 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:57:18,409 WARN L293 SmtUtils]: Spent 8.35s on a formula simplification. DAG size of input: 142 DAG size of output: 141 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:57:30,670 WARN L293 SmtUtils]: Spent 6.57s on a formula simplification. DAG size of input: 132 DAG size of output: 131 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 15:58:08,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:08,956 INFO L93 Difference]: Finished difference Result 1888 states and 5924 transitions. [2023-12-02 15:58:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-12-02 15:58:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-12-02 15:58:08,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:08,960 INFO L225 Difference]: With dead ends: 1888 [2023-12-02 15:58:08,960 INFO L226 Difference]: Without dead ends: 1888 [2023-12-02 15:58:08,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1998 ImplicationChecksByTransitivity, 231.2s TimeCoverageRelationStatistics Valid=2854, Invalid=6458, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 15:58:08,963 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 202 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 3273 mSolverCounterSat, 224 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 46.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 3515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 3273 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.4s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:08,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 308 Invalid, 3515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 3273 Invalid, 18 Unknown, 0 Unchecked, 47.4s Time] [2023-12-02 15:58:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2023-12-02 15:58:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1888. [2023-12-02 15:58:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1888 states, 1885 states have (on average 3.142705570291777) internal successors, (5924), 1887 states have internal predecessors, (5924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:08,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1888 states to 1888 states and 5924 transitions. [2023-12-02 15:58:08,990 INFO L78 Accepts]: Start accepts. Automaton has 1888 states and 5924 transitions. Word has length 40 [2023-12-02 15:58:08,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:08,990 INFO L495 AbstractCegarLoop]: Abstraction has 1888 states and 5924 transitions. [2023-12-02 15:58:08,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:08,990 INFO L276 IsEmpty]: Start isEmpty. Operand 1888 states and 5924 transitions. [2023-12-02 15:58:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 15:58:08,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:08,994 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:09,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-12-02 15:58:09,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2023-12-02 15:58:09,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2023-12-02 15:58:09,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 15:58:09,595 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:09,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2117077016, now seen corresponding path program 1 times [2023-12-02 15:58:09,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:09,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800494680] [2023-12-02 15:58:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:09,596 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 15:58:09,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:09,597 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:09,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2023-12-02 15:58:09,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:58:09,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:58:09,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:10,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:10,771 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:10,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:10,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800494680] [2023-12-02 15:58:10,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800494680] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:10,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:10,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 15:58:10,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939045774] [2023-12-02 15:58:10,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:10,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-02 15:58:10,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:10,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-02 15:58:10,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:58:10,772 INFO L87 Difference]: Start difference. First operand 1888 states and 5924 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:13,727 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 15:58:15,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:58:16,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:16,636 INFO L93 Difference]: Finished difference Result 2971 states and 9023 transitions. [2023-12-02 15:58:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-02 15:58:16,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 15:58:16,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:16,640 INFO L225 Difference]: With dead ends: 2971 [2023-12-02 15:58:16,640 INFO L226 Difference]: Without dead ends: 2348 [2023-12-02 15:58:16,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:58:16,641 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 130 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:16,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 228 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 548 Invalid, 2 Unknown, 0 Unchecked, 5.8s Time] [2023-12-02 15:58:16,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2023-12-02 15:58:16,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 1858. [2023-12-02 15:58:16,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1855 states have (on average 3.1277628032345013) internal successors, (5802), 1857 states have internal predecessors, (5802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:16,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 5802 transitions. [2023-12-02 15:58:16,670 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 5802 transitions. Word has length 43 [2023-12-02 15:58:16,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:16,670 INFO L495 AbstractCegarLoop]: Abstraction has 1858 states and 5802 transitions. [2023-12-02 15:58:16,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:16,670 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 5802 transitions. [2023-12-02 15:58:16,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 15:58:16,676 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:16,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:16,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (39)] Ended with exit code 0 [2023-12-02 15:58:16,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:16,877 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:16,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:16,877 INFO L85 PathProgramCache]: Analyzing trace with hash -598015022, now seen corresponding path program 2 times [2023-12-02 15:58:16,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:16,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791098964] [2023-12-02 15:58:16,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:58:16,877 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 15:58:16,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:16,878 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:16,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (40)] Waiting until timeout for monitored process [2023-12-02 15:58:17,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-12-02 15:58:17,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:17,040 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:58:17,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:17,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:17,599 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:17,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791098964] [2023-12-02 15:58:17,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791098964] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:17,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:17,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:58:17,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620311812] [2023-12-02 15:58:17,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:17,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:58:17,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:17,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:58:17,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:58:17,600 INFO L87 Difference]: Start difference. First operand 1858 states and 5802 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:19,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:19,160 INFO L93 Difference]: Finished difference Result 2645 states and 8050 transitions. [2023-12-02 15:58:19,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:58:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 15:58:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:19,164 INFO L225 Difference]: With dead ends: 2645 [2023-12-02 15:58:19,164 INFO L226 Difference]: Without dead ends: 2493 [2023-12-02 15:58:19,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:58:19,165 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 111 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:19,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 199 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 15:58:19,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2023-12-02 15:58:19,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2054. [2023-12-02 15:58:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2051 states have (on average 3.0955631399317407) internal successors, (6349), 2053 states have internal predecessors, (6349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 6349 transitions. [2023-12-02 15:58:19,196 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 6349 transitions. Word has length 43 [2023-12-02 15:58:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:19,197 INFO L495 AbstractCegarLoop]: Abstraction has 2054 states and 6349 transitions. [2023-12-02 15:58:19,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:19,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 6349 transitions. [2023-12-02 15:58:19,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 15:58:19,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:19,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:19,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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)] Ended with exit code 0 [2023-12-02 15:58:19,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:19,401 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:19,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:19,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1839715036, now seen corresponding path program 3 times [2023-12-02 15:58:19,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:19,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632738317] [2023-12-02 15:58:19,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:58:19,402 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 15:58:19,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:19,403 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:19,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:19,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-12-02 15:58:19,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:19,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:58:19,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:19,893 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:58:19,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2023-12-02 15:58:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:20,093 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:20,093 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:20,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632738317] [2023-12-02 15:58:20,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [632738317] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:20,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:20,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:58:20,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145483406] [2023-12-02 15:58:20,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:58:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:20,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:58:20,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:58:20,095 INFO L87 Difference]: Start difference. First operand 2054 states and 6349 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:21,081 INFO L93 Difference]: Finished difference Result 2614 states and 7975 transitions. [2023-12-02 15:58:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 15:58:21,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 15:58:21,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:21,086 INFO L225 Difference]: With dead ends: 2614 [2023-12-02 15:58:21,086 INFO L226 Difference]: Without dead ends: 2529 [2023-12-02 15:58:21,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-12-02 15:58:21,086 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 148 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:21,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 162 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 15:58:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2529 states. [2023-12-02 15:58:21,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2529 to 2072. [2023-12-02 15:58:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2069 states have (on average 3.095698405026583) internal successors, (6405), 2071 states have internal predecessors, (6405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6405 transitions. [2023-12-02 15:58:21,126 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6405 transitions. Word has length 43 [2023-12-02 15:58:21,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:21,126 INFO L495 AbstractCegarLoop]: Abstraction has 2072 states and 6405 transitions. [2023-12-02 15:58:21,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6405 transitions. [2023-12-02 15:58:21,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 15:58:21,129 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:21,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:21,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:21,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:21,330 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:21,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:21,330 INFO L85 PathProgramCache]: Analyzing trace with hash -901590314, now seen corresponding path program 4 times [2023-12-02 15:58:21,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:21,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421170520] [2023-12-02 15:58:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:21,331 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:58:21,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:21,331 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:21,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2023-12-02 15:58:21,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:21,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:21,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:58:21,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:21,944 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:58:21,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2023-12-02 15:58:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:22,129 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:22,129 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:22,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421170520] [2023-12-02 15:58:22,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421170520] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:22,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:22,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:58:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878351180] [2023-12-02 15:58:22,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:22,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:58:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:22,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:58:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:58:22,131 INFO L87 Difference]: Start difference. First operand 2072 states and 6405 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:23,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:23,607 INFO L93 Difference]: Finished difference Result 2852 states and 8746 transitions. [2023-12-02 15:58:23,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:58:23,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 15:58:23,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:23,612 INFO L225 Difference]: With dead ends: 2852 [2023-12-02 15:58:23,612 INFO L226 Difference]: Without dead ends: 2766 [2023-12-02 15:58:23,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-02 15:58:23,612 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 165 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:23,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 240 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 15:58:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2023-12-02 15:58:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2147. [2023-12-02 15:58:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2144 states have (on average 3.0946828358208953) internal successors, (6635), 2146 states have internal predecessors, (6635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6635 transitions. [2023-12-02 15:58:23,645 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6635 transitions. Word has length 43 [2023-12-02 15:58:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:23,646 INFO L495 AbstractCegarLoop]: Abstraction has 2147 states and 6635 transitions. [2023-12-02 15:58:23,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:23,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6635 transitions. [2023-12-02 15:58:23,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-02 15:58:23,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:23,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:23,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (42)] Ended with exit code 0 [2023-12-02 15:58:23,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:23,849 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:23,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:23,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1733373338, now seen corresponding path program 5 times [2023-12-02 15:58:23,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:23,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1612582178] [2023-12-02 15:58:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-02 15:58:23,850 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 15:58:23,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:23,851 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:23,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2023-12-02 15:58:24,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:58:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:24,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:58:24,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:24,260 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:24,260 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:24,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1612582178] [2023-12-02 15:58:24,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1612582178] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:24,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:24,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 15:58:24,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354109761] [2023-12-02 15:58:24,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:24,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 15:58:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:24,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 15:58:24,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-12-02 15:58:24,261 INFO L87 Difference]: Start difference. First operand 2147 states and 6635 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:24,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:24,759 INFO L93 Difference]: Finished difference Result 3390 states and 10685 transitions. [2023-12-02 15:58:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:58:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-12-02 15:58:24,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:24,765 INFO L225 Difference]: With dead ends: 3390 [2023-12-02 15:58:24,765 INFO L226 Difference]: Without dead ends: 3221 [2023-12-02 15:58:24,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:58:24,766 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 120 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:24,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 148 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 15:58:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3221 states. [2023-12-02 15:58:24,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3221 to 2444. [2023-12-02 15:58:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2444 states, 2441 states have (on average 3.0807046292503073) internal successors, (7520), 2443 states have internal predecessors, (7520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2444 states to 2444 states and 7520 transitions. [2023-12-02 15:58:24,807 INFO L78 Accepts]: Start accepts. Automaton has 2444 states and 7520 transitions. Word has length 43 [2023-12-02 15:58:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:24,807 INFO L495 AbstractCegarLoop]: Abstraction has 2444 states and 7520 transitions. [2023-12-02 15:58:24,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2444 states and 7520 transitions. [2023-12-02 15:58:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-02 15:58:24,811 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:24,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 15:58:24,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (43)] Ended with exit code 0 [2023-12-02 15:58:25,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:25,011 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:25,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:25,012 INFO L85 PathProgramCache]: Analyzing trace with hash -747535699, now seen corresponding path program 1 times [2023-12-02 15:58:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:25,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951417587] [2023-12-02 15:58:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:25,012 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:58:25,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:25,013 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:25,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:58:25,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:58:25,220 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:25,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:25,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:26,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:26,165 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951417587] [2023-12-02 15:58:26,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1951417587] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:26,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2029928962] [2023-12-02 15:58:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:26,166 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:58:26,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:58:26,167 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:58:26,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 15:58:26,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:58:26,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:58:26,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:26,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:27,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2029928962] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:27,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051203397] [2023-12-02 15:58:27,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:27,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:27,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:58:27,155 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:58:27,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-12-02 15:58:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:58:27,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 15:58:27,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:27,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:28,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051203397] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:28,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:58:28,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 5, 5] total 17 [2023-12-02 15:58:28,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506299409] [2023-12-02 15:58:28,128 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:58:28,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-02 15:58:28,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:28,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-02 15:58:28,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-12-02 15:58:28,130 INFO L87 Difference]: Start difference. First operand 2444 states and 7520 transitions. Second operand has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:29,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:29,006 INFO L93 Difference]: Finished difference Result 4513 states and 13770 transitions. [2023-12-02 15:58:29,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 15:58:29,007 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-12-02 15:58:29,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:29,013 INFO L225 Difference]: With dead ends: 4513 [2023-12-02 15:58:29,013 INFO L226 Difference]: Without dead ends: 3538 [2023-12-02 15:58:29,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2023-12-02 15:58:29,014 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 55 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:29,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 192 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 15:58:29,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2023-12-02 15:58:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2542. [2023-12-02 15:58:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2542 states, 2539 states have (on average 3.0236313509255615) internal successors, (7677), 2541 states have internal predecessors, (7677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:29,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2542 states to 2542 states and 7677 transitions. [2023-12-02 15:58:29,075 INFO L78 Accepts]: Start accepts. Automaton has 2542 states and 7677 transitions. Word has length 46 [2023-12-02 15:58:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:29,075 INFO L495 AbstractCegarLoop]: Abstraction has 2542 states and 7677 transitions. [2023-12-02 15:58:29,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.611111111111111) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 2542 states and 7677 transitions. [2023-12-02 15:58:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:58:29,081 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:29,081 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, 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 15:58:29,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Ended with exit code 0 [2023-12-02 15:58:29,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-12-02 15:58:29,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (44)] Forceful destruction successful, exit code 0 [2023-12-02 15:58:29,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:29,682 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:29,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1626971940, now seen corresponding path program 1 times [2023-12-02 15:58:29,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:29,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528763889] [2023-12-02 15:58:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 15:58:29,683 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 15:58:29,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:29,684 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:29,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2023-12-02 15:58:29,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 15:58:29,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 15:58:29,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:29,934 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:58:29,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2023-12-02 15:58:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:29,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:29,986 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:29,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528763889] [2023-12-02 15:58:29,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528763889] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:29,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:29,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:58:29,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209484726] [2023-12-02 15:58:29,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:29,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:58:29,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:58:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:58:29,988 INFO L87 Difference]: Start difference. First operand 2542 states and 7677 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:31,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:31,204 INFO L93 Difference]: Finished difference Result 4151 states and 13053 transitions. [2023-12-02 15:58:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 15:58:31,205 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 15:58:31,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:31,212 INFO L225 Difference]: With dead ends: 4151 [2023-12-02 15:58:31,212 INFO L226 Difference]: Without dead ends: 4130 [2023-12-02 15:58:31,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 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 15:58:31,212 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 107 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:31,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 129 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 15:58:31,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4130 states. [2023-12-02 15:58:31,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4130 to 2956. [2023-12-02 15:58:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2953 states have (on average 3.1154757873349137) internal successors, (9200), 2955 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:31,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 9200 transitions. [2023-12-02 15:58:31,263 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 9200 transitions. Word has length 47 [2023-12-02 15:58:31,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:31,263 INFO L495 AbstractCegarLoop]: Abstraction has 2956 states and 9200 transitions. [2023-12-02 15:58:31,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:31,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 9200 transitions. [2023-12-02 15:58:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:58:31,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:31,267 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, 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 15:58:31,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (47)] Ended with exit code 0 [2023-12-02 15:58:31,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:31,468 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:31,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:31,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1711370714, now seen corresponding path program 2 times [2023-12-02 15:58:31,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:31,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57723695] [2023-12-02 15:58:31,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:58:31,469 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:58:31,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:31,469 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:31,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:31,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:58:31,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:31,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 15:58:31,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:31,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-02 15:58:31,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 19 [2023-12-02 15:58:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:31,862 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:31,863 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:31,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57723695] [2023-12-02 15:58:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57723695] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:31,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 15:58:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077618275] [2023-12-02 15:58:31,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 15:58:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 15:58:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 15:58:31,864 INFO L87 Difference]: Start difference. First operand 2956 states and 9200 transitions. Second operand has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:34,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-12-02 15:58:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:35,469 INFO L93 Difference]: Finished difference Result 4881 states and 15489 transitions. [2023-12-02 15:58:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:58:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 15:58:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:35,483 INFO L225 Difference]: With dead ends: 4881 [2023-12-02 15:58:35,483 INFO L226 Difference]: Without dead ends: 4881 [2023-12-02 15:58:35,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:58:35,483 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 110 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:35,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 141 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 410 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-12-02 15:58:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4881 states. [2023-12-02 15:58:35,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4881 to 3430. [2023-12-02 15:58:35,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3430 states, 3427 states have (on average 3.176539247154946) internal successors, (10886), 3429 states have internal predecessors, (10886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3430 states to 3430 states and 10886 transitions. [2023-12-02 15:58:35,547 INFO L78 Accepts]: Start accepts. Automaton has 3430 states and 10886 transitions. Word has length 47 [2023-12-02 15:58:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:35,548 INFO L495 AbstractCegarLoop]: Abstraction has 3430 states and 10886 transitions. [2023-12-02 15:58:35,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.833333333333333) internal successors, (47), 5 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3430 states and 10886 transitions. [2023-12-02 15:58:35,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:58:35,553 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:35,553 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, 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 15:58:35,557 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:35,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:35,754 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:35,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:35,754 INFO L85 PathProgramCache]: Analyzing trace with hash 69319072, now seen corresponding path program 3 times [2023-12-02 15:58:35,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:35,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1007285113] [2023-12-02 15:58:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 15:58:35,755 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 15:58:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:35,756 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:35,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2023-12-02 15:58:36,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 15:58:36,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:36,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:58:36,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:36,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:36,778 INFO L349 Elim1Store]: treesize reduction 21, result has 30.0 percent of original size [2023-12-02 15:58:36,778 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 97 treesize of output 87 [2023-12-02 15:58:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 15:58:37,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:37,031 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:37,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1007285113] [2023-12-02 15:58:37,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1007285113] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:37,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:37,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-02 15:58:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74664495] [2023-12-02 15:58:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:37,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 15:58:37,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:37,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 15:58:37,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2023-12-02 15:58:37,032 INFO L87 Difference]: Start difference. First operand 3430 states and 10886 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:40,619 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 15:58:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:41,941 INFO L93 Difference]: Finished difference Result 3820 states and 11978 transitions. [2023-12-02 15:58:41,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 15:58:41,943 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 15:58:41,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:41,950 INFO L225 Difference]: With dead ends: 3820 [2023-12-02 15:58:41,950 INFO L226 Difference]: Without dead ends: 3448 [2023-12-02 15:58:41,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-12-02 15:58:41,950 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:41,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 206 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 557 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2023-12-02 15:58:41,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3448 states. [2023-12-02 15:58:41,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3448 to 3448. [2023-12-02 15:58:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3448 states, 3445 states have (on average 3.1712626995645863) internal successors, (10925), 3447 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3448 states to 3448 states and 10925 transitions. [2023-12-02 15:58:41,999 INFO L78 Accepts]: Start accepts. Automaton has 3448 states and 10925 transitions. Word has length 47 [2023-12-02 15:58:42,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:42,000 INFO L495 AbstractCegarLoop]: Abstraction has 3448 states and 10925 transitions. [2023-12-02 15:58:42,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 3448 states and 10925 transitions. [2023-12-02 15:58:42,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-02 15:58:42,005 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:42,005 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, 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 15:58:42,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (49)] Ended with exit code 0 [2023-12-02 15:58:42,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:42,206 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:42,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1803399730, now seen corresponding path program 4 times [2023-12-02 15:58:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:42,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [653505453] [2023-12-02 15:58:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:42,206 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 15:58:42,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:42,207 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:42,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2023-12-02 15:58:42,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:42,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:42,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 15:58:42,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:42,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:42,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:58:43,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [653505453] [2023-12-02 15:58:43,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [653505453] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:43,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [867829805] [2023-12-02 15:58:43,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:43,539 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:58:43,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:58:43,540 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:58:43,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Waiting until timeout for monitored process [2023-12-02 15:58:43,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:43,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:43,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:58:43,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:44,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:45,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [867829805] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:45,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239241750] [2023-12-02 15:58:45,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:45,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:45,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:58:45,352 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:58:45,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-12-02 15:58:45,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:45,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:45,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 15:58:45,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:45,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:45,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:58:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 15:58:47,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239241750] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:58:47,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:58:47,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8, 8, 6, 6] total 34 [2023-12-02 15:58:47,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092773190] [2023-12-02 15:58:47,162 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:58:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-02 15:58:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:47,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-02 15:58:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=834, Unknown=0, NotChecked=0, Total=1122 [2023-12-02 15:58:47,164 INFO L87 Difference]: Start difference. First operand 3448 states and 10925 transitions. Second operand has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:49,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:49,551 INFO L93 Difference]: Finished difference Result 9159 states and 29486 transitions. [2023-12-02 15:58:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-02 15:58:49,552 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-12-02 15:58:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:49,570 INFO L225 Difference]: With dead ends: 9159 [2023-12-02 15:58:49,570 INFO L226 Difference]: Without dead ends: 7200 [2023-12-02 15:58:49,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 244 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=389, Invalid=1093, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 15:58:49,571 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 634 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:49,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 455 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 15:58:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7200 states. [2023-12-02 15:58:49,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7200 to 5492. [2023-12-02 15:58:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5492 states, 5489 states have (on average 3.2608854071779922) internal successors, (17899), 5491 states have internal predecessors, (17899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:49,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5492 states to 5492 states and 17899 transitions. [2023-12-02 15:58:49,680 INFO L78 Accepts]: Start accepts. Automaton has 5492 states and 17899 transitions. Word has length 47 [2023-12-02 15:58:49,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:49,680 INFO L495 AbstractCegarLoop]: Abstraction has 5492 states and 17899 transitions. [2023-12-02 15:58:49,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.882352941176471) internal successors, (200), 34 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:49,680 INFO L276 IsEmpty]: Start isEmpty. Operand 5492 states and 17899 transitions. [2023-12-02 15:58:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 15:58:49,689 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:49,689 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 15:58:49,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (51)] Ended with exit code 0 [2023-12-02 15:58:49,893 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (50)] Ended with exit code 0 [2023-12-02 15:58:50,096 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-12-02 15:58:50,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:58:50,290 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:50,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:50,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1941529365, now seen corresponding path program 2 times [2023-12-02 15:58:50,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:50,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [622945793] [2023-12-02 15:58:50,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-02 15:58:50,291 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 15:58:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:50,293 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:50,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2023-12-02 15:58:50,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-02 15:58:50,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:50,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 15:58:50,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:50,734 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 178 treesize of output 174 [2023-12-02 15:58:51,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:51,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 42 [2023-12-02 15:58:51,379 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 53 treesize of output 42 [2023-12-02 15:58:51,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-02 15:58:51,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 15:58:51,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:58:51,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [622945793] [2023-12-02 15:58:51,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [622945793] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 15:58:51,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 15:58:51,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-02 15:58:51,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065159307] [2023-12-02 15:58:51,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 15:58:51,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 15:58:51,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:58:51,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 15:58:51,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-12-02 15:58:51,657 INFO L87 Difference]: Start difference. First operand 5492 states and 17899 transitions. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 15:58:53,554 INFO L93 Difference]: Finished difference Result 6083 states and 19675 transitions. [2023-12-02 15:58:53,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 15:58:53,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-02 15:58:53,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 15:58:53,573 INFO L225 Difference]: With dead ends: 6083 [2023-12-02 15:58:53,573 INFO L226 Difference]: Without dead ends: 5292 [2023-12-02 15:58:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-12-02 15:58:53,574 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 58 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 15:58:53,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 138 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 15:58:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5292 states. [2023-12-02 15:58:53,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5292 to 4872. [2023-12-02 15:58:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4872 states, 4869 states have (on average 3.257753132059971) internal successors, (15862), 4871 states have internal predecessors, (15862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:53,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4872 states to 4872 states and 15862 transitions. [2023-12-02 15:58:53,691 INFO L78 Accepts]: Start accepts. Automaton has 4872 states and 15862 transitions. Word has length 48 [2023-12-02 15:58:53,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 15:58:53,691 INFO L495 AbstractCegarLoop]: Abstraction has 4872 states and 15862 transitions. [2023-12-02 15:58:53,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 15:58:53,692 INFO L276 IsEmpty]: Start isEmpty. Operand 4872 states and 15862 transitions. [2023-12-02 15:58:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-12-02 15:58:53,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 15:58:53,700 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 1, 1] [2023-12-02 15:58:53,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (53)] Ended with exit code 0 [2023-12-02 15:58:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:53,900 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-12-02 15:58:53,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 15:58:53,901 INFO L85 PathProgramCache]: Analyzing trace with hash 399509042, now seen corresponding path program 4 times [2023-12-02 15:58:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 15:58:53,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453501551] [2023-12-02 15:58:53,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:58:53,901 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-12-02 15:58:53,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 15:58:53,902 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:53,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/mathsat -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 15:58:54,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:58:54,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:58:54,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 15:58:54,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:58:54,141 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 13 treesize of output 7 [2023-12-02 15:58:54,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,150 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 8 treesize of output 1 [2023-12-02 15:58:54,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:58:54,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,190 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 8 treesize of output 1 [2023-12-02 15:58:54,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,204 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 8 treesize of output 1 [2023-12-02 15:58:54,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:58:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,243 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 8 treesize of output 1 [2023-12-02 15:58:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:58:54,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:58:54,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:58:54,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:58:54,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,371 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 8 treesize of output 1 [2023-12-02 15:58:54,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:58:54,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:58:54,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:58:54,414 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 8 treesize of output 1 [2023-12-02 15:58:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:58:56,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:59:10,864 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:59:10,864 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 15:59:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453501551] [2023-12-02 15:59:10,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [453501551] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:59:10,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1918556862] [2023-12-02 15:59:10,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:59:10,865 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 15:59:10,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 15:59:10,865 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 15:59:10,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (55)] Waiting until timeout for monitored process [2023-12-02 15:59:11,417 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:59:11,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:59:11,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 15:59:11,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:59:11,436 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 13 treesize of output 7 [2023-12-02 15:59:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,447 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 8 treesize of output 1 [2023-12-02 15:59:11,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,463 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 8 treesize of output 1 [2023-12-02 15:59:11,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:11,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:59:11,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:11,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:11,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:11,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,623 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 8 treesize of output 1 [2023-12-02 15:59:11,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,640 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 8 treesize of output 1 [2023-12-02 15:59:11,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:11,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,688 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 8 treesize of output 1 [2023-12-02 15:59:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:11,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,705 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 8 treesize of output 1 [2023-12-02 15:59:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:11,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:11,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:59:14,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:59:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:59:17,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1918556862] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:59:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191873178] [2023-12-02 15:59:17,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 15:59:17,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 15:59:17,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 15:59:17,463 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 15:59:17,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5c28fbfe-c3cf-4a83-aa39-71440b3186b7/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-12-02 15:59:17,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 15:59:17,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 15:59:17,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-02 15:59:17,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 15:59:17,753 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 13 treesize of output 7 [2023-12-02 15:59:17,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,777 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 8 treesize of output 1 [2023-12-02 15:59:17,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,789 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 8 treesize of output 1 [2023-12-02 15:59:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,797 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:17,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,826 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 8 treesize of output 1 [2023-12-02 15:59:17,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,839 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 8 treesize of output 1 [2023-12-02 15:59:17,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,853 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 8 treesize of output 1 [2023-12-02 15:59:17,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:17,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,889 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 8 treesize of output 1 [2023-12-02 15:59:17,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:17,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-02 15:59:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:17,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-12-02 15:59:17,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-02 15:59:17,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-12-02 15:59:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:59:18,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 15:59:21,038 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 15:59:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191873178] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 15:59:21,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 15:59:21,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 27, 27, 26, 26] total 69 [2023-12-02 15:59:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244651310] [2023-12-02 15:59:21,039 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 15:59:21,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-12-02 15:59:21,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 15:59:21,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-12-02 15:59:21,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3744, Unknown=0, NotChecked=0, Total=4970 [2023-12-02 15:59:21,041 INFO L87 Difference]: Start difference. First operand 4872 states and 15862 transitions. Second operand has 71 states, 70 states have (on average 1.9428571428571428) internal successors, (136), 70 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 16:00:05,781 WARN L293 SmtUtils]: Spent 24.42s on a formula simplification that was a NOOP. DAG size: 275 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:00:54,910 WARN L293 SmtUtils]: Spent 47.62s on a formula simplification. DAG size of input: 271 DAG size of output: 270 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:01:19,868 WARN L293 SmtUtils]: Spent 22.97s on a formula simplification that was a NOOP. DAG size: 265 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:02:08,017 WARN L293 SmtUtils]: Spent 46.09s on a formula simplification. DAG size of input: 261 DAG size of output: 260 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:02:10,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:12,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:14,109 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:16,112 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:18,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:20,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:22,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:24,126 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:26,129 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:28,132 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:30,135 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:32,139 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:34,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:36,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:38,149 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:40,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:42,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:44,159 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:46,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:48,211 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:50,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:52,217 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:54,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-12-02 16:02:56,224 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 [] [2023-12-02 16:03:19,366 WARN L293 SmtUtils]: Spent 21.25s on a formula simplification that was a NOOP. DAG size: 254 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:04:00,839 WARN L293 SmtUtils]: Spent 39.57s on a formula simplification. DAG size of input: 250 DAG size of output: 249 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-02 16:04:23,088 WARN L293 SmtUtils]: Spent 20.24s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)