./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 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_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire --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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:05,405 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:05,518 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:08:05,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:05,528 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:05,572 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:05,574 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:05,575 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:05,576 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:05,581 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:05,581 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:05,583 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:05,583 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:05,585 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:08:05,585 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:05,586 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:05,586 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:08:05,587 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:08:05,587 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:05,588 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:08:05,588 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:08:05,589 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:08:05,590 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:08:05,590 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:08:05,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:05,591 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:05,592 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:05,592 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:05,593 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:05,593 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:08:05,595 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:08:05,595 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:08:05,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:05,596 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:08:05,596 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:08:05,596 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:05,597 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:05,597 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:05,597 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:05,597 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:05,598 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:05,598 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:05,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:05,599 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:08:05,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:08:05,600 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:05,600 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:05,600 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:05,601 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_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-23 21:08:05,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:05,934 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:05,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:05,938 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:05,939 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:05,940 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-23 21:08:09,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:09,320 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:09,321 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-23 21:08:09,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data/5a2875f3a/29b1a3256dee41e5a42fc908cd05fc8d/FLAGdb7f50327 [2023-11-23 21:08:09,354 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data/5a2875f3a/29b1a3256dee41e5a42fc908cd05fc8d [2023-11-23 21:08:09,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:09,365 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:09,369 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:09,369 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:09,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:09,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:09" (1/1) ... [2023-11-23 21:08:09,378 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27cadbde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:09, skipping insertion in model container [2023-11-23 21:08:09,379 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:09" (1/1) ... [2023-11-23 21:08:09,427 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:09,733 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:09,751 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-23 21:08:09,752 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@287bdeea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:09, skipping insertion in model container [2023-11-23 21:08:09,752 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:09,753 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 21:08:09,755 INFO L158 Benchmark]: Toolchain (without parser) took 389.43ms. Allocated memory is still 127.9MB. Free memory was 86.6MB in the beginning and 76.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:08:09,756 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 127.9MB. Free memory is still 99.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:08:09,756 INFO L158 Benchmark]: CACSL2BoogieTranslator took 383.88ms. Allocated memory is still 127.9MB. Free memory was 86.6MB in the beginning and 76.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:08:09,758 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 127.9MB. Free memory is still 99.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 383.88ms. Allocated memory is still 127.9MB. Free memory was 86.6MB in the beginning and 76.1MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 118]: 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_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire --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 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:08:12,470 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:08:12,611 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 21:08:12,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:08:12,621 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:08:12,688 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:08:12,689 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:08:12,690 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:08:12,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:08:12,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:08:12,697 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:08:12,698 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:08:12,699 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:08:12,701 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:08:12,701 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:08:12,702 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:08:12,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:08:12,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:08:12,704 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:08:12,705 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:08:12,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:08:12,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:08:12,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:08:12,708 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:08:12,708 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:08:12,709 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:08:12,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:08:12,710 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:08:12,710 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:08:12,711 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:08:12,713 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:08:12,713 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:08:12,714 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:08:12,714 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:08:12,714 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:08:12,715 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:08:12,716 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:08:12,716 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:12,717 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:08:12,717 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:08:12,717 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:08:12,718 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:08:12,718 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:08:12,718 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:08:12,719 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:08:12,719 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_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 779f57e464f50d458e1b66270e0c9f2866c6247d4d7f63a3096c6ac13e286657 [2023-11-23 21:08:13,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:08:13,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:08:13,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:08:13,259 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:08:13,259 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:08:13,262 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-23 21:08:16,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:08:16,667 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:08:16,668 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/sv-benchmarks/c/weaver/chl-array-int-subst.wvr.c [2023-11-23 21:08:16,678 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data/cd70205f4/6b084c1ba6dd419ea3a270fdd4670f6d/FLAGcb5eed841 [2023-11-23 21:08:16,696 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/data/cd70205f4/6b084c1ba6dd419ea3a270fdd4670f6d [2023-11-23 21:08:16,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:08:16,701 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:08:16,702 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:16,703 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:08:16,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:08:16,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:16" (1/1) ... [2023-11-23 21:08:16,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30405d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:16, skipping insertion in model container [2023-11-23 21:08:16,712 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:08:16" (1/1) ... [2023-11-23 21:08:16,744 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:17,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:17,094 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 21:08:17,112 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:08:17,207 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:17,221 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:08:17,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:08:17,364 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:08:17,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17 WrapperNode [2023-11-23 21:08:17,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:08:17,367 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:17,367 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:08:17,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:08:17,377 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,411 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,475 INFO L138 Inliner]: procedures = 28, calls = 51, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 285 [2023-11-23 21:08:17,479 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:08:17,480 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:08:17,480 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:08:17,480 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:08:17,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,514 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,553 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,559 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,573 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,576 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,582 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:08:17,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:08:17,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:08:17,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:08:17,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (1/1) ... [2023-11-23 21:08:17,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:08:17,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:17,639 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:08:17,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:08:17,703 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:08:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:08:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:08:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 21:08:17,704 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:08:17,705 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:08:17,705 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:08:17,707 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:08:17,708 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 21:08:17,708 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 21:08:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:08:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:08:17,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:08:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:08:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 21:08:17,712 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:08:17,930 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:08:17,933 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:08:19,214 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:08:19,919 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:08:19,919 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 21:08:19,920 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:19 BoogieIcfgContainer [2023-11-23 21:08:19,920 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:08:19,924 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:08:19,925 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:08:19,929 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:08:19,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:08:16" (1/3) ... [2023-11-23 21:08:19,932 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e93c94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:19, skipping insertion in model container [2023-11-23 21:08:19,932 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:08:17" (2/3) ... [2023-11-23 21:08:19,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e93c94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:08:19, skipping insertion in model container [2023-11-23 21:08:19,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:08:19" (3/3) ... [2023-11-23 21:08:19,937 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-subst.wvr.c [2023-11-23 21:08:19,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:08:19,964 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-23 21:08:19,964 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:08:20,108 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 21:08:20,161 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 108 places, 107 transitions, 235 flow [2023-11-23 21:08:21,890 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27647 states, 25091 states have (on average 4.267147582798613) internal successors, (107067), 27646 states have internal predecessors, (107067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:21,917 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:08:21,924 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;@4241f791, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:08:21,924 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-23 21:08:21,975 INFO L276 IsEmpty]: Start isEmpty. Operand has 27647 states, 25091 states have (on average 4.267147582798613) internal successors, (107067), 27646 states have internal predecessors, (107067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:21,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:08:21,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:21,982 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:08:21,983 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:21,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 881931, now seen corresponding path program 1 times [2023-11-23 21:08:22,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:22,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209614326] [2023-11-23 21:08:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:22,002 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:22,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:22,009 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:22,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 21:08:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:22,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:08:22,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:22,336 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 [2023-11-23 21:08:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:22,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,382 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 [2023-11-23 21:08:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,393 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 11 treesize of output 1 [2023-11-23 21:08:22,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:08:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,453 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:22,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,550 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 [2023-11-23 21:08:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:22,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:08:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,670 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 11 treesize of output 1 [2023-11-23 21:08:22,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:08:22,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:22,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,728 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 11 treesize of output 1 [2023-11-23 21:08:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,734 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:08:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:08:22,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:22,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:22,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:22,791 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:22,792 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:22,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209614326] [2023-11-23 21:08:22,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209614326] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:22,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:22,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:08:22,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737945000] [2023-11-23 21:08:22,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:22,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:08:22,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:22,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:08:22,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:22,886 INFO L87 Difference]: Start difference. First operand has 27647 states, 25091 states have (on average 4.267147582798613) internal successors, (107067), 27646 states have internal predecessors, (107067), 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) [2023-11-23 21:08:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:24,156 INFO L93 Difference]: Finished difference Result 27642 states and 107062 transitions. [2023-11-23 21:08:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:24,159 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 [2023-11-23 21:08:24,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:24,967 INFO L225 Difference]: With dead ends: 27642 [2023-11-23 21:08:24,967 INFO L226 Difference]: Without dead ends: 27642 [2023-11-23 21:08:24,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:08:24,973 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:24,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:08:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27642 states. [2023-11-23 21:08:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27642 to 27642. [2023-11-23 21:08:26,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27642 states, 25090 states have (on average 4.267118373854125) internal successors, (107062), 27641 states have internal predecessors, (107062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27642 states to 27642 states and 107062 transitions. [2023-11-23 21:08:27,397 INFO L78 Accepts]: Start accepts. Automaton has 27642 states and 107062 transitions. Word has length 3 [2023-11-23 21:08:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:27,398 INFO L495 AbstractCegarLoop]: Abstraction has 27642 states and 107062 transitions. [2023-11-23 21:08:27,398 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) [2023-11-23 21:08:27,398 INFO L276 IsEmpty]: Start isEmpty. Operand 27642 states and 107062 transitions. [2023-11-23 21:08:27,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:08:27,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:27,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:08:27,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:27,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:27,610 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:27,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash 881932, now seen corresponding path program 1 times [2023-11-23 21:08:27,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:27,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361619228] [2023-11-23 21:08:27,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:27,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:27,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:27,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:27,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 21:08:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:27,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:08:27,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:27,841 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 [2023-11-23 21:08:27,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:27,864 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 [2023-11-23 21:08:27,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:27,903 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 [2023-11-23 21:08:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:27,933 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 [2023-11-23 21:08:27,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:27,955 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 [2023-11-23 21:08:27,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:27,973 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 [2023-11-23 21:08:27,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:27,998 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 [2023-11-23 21:08:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,015 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 [2023-11-23 21:08:28,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,034 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 [2023-11-23 21:08:28,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,052 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 [2023-11-23 21:08:28,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,090 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 [2023-11-23 21:08:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,111 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 [2023-11-23 21:08:28,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,160 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 [2023-11-23 21:08:28,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,182 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 [2023-11-23 21:08:28,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,232 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 [2023-11-23 21:08:28,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,281 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 [2023-11-23 21:08:28,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,321 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 [2023-11-23 21:08:28,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,346 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 [2023-11-23 21:08:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,375 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 [2023-11-23 21:08:28,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,390 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 [2023-11-23 21:08:28,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,413 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 [2023-11-23 21:08:28,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,445 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 [2023-11-23 21:08:28,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,460 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 [2023-11-23 21:08:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:28,479 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 [2023-11-23 21:08:28,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:28,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:28,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:28,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361619228] [2023-11-23 21:08:28,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361619228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:28,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:28,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:08:28,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124616599] [2023-11-23 21:08:28,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:28,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:28,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:28,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:28,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:28,608 INFO L87 Difference]: Start difference. First operand 27642 states and 107062 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) [2023-11-23 21:08:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:30,763 INFO L93 Difference]: Finished difference Result 27648 states and 107071 transitions. [2023-11-23 21:08:30,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:08:30,764 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 [2023-11-23 21:08:30,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:31,248 INFO L225 Difference]: With dead ends: 27648 [2023-11-23 21:08:31,249 INFO L226 Difference]: Without dead ends: 27648 [2023-11-23 21:08:31,249 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 [2023-11-23 21:08:31,250 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:31,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-23 21:08:31,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27648 states. [2023-11-23 21:08:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27648 to 27648. [2023-11-23 21:08:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27648 states, 25096 states have (on average 4.266456805865476) internal successors, (107071), 27647 states have internal predecessors, (107071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27648 states to 27648 states and 107071 transitions. [2023-11-23 21:08:33,132 INFO L78 Accepts]: Start accepts. Automaton has 27648 states and 107071 transitions. Word has length 3 [2023-11-23 21:08:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:33,133 INFO L495 AbstractCegarLoop]: Abstraction has 27648 states and 107071 transitions. [2023-11-23 21:08:33,133 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) [2023-11-23 21:08:33,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27648 states and 107071 transitions. [2023-11-23 21:08:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:08:33,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:33,135 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-23 21:08:33,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:33,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:33,337 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:33,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:33,339 INFO L85 PathProgramCache]: Analyzing trace with hash 847565216, now seen corresponding path program 1 times [2023-11-23 21:08:33,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:33,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655474376] [2023-11-23 21:08:33,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:33,340 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:33,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:33,346 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:33,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-23 21:08:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:33,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:08:33,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:33,482 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 [2023-11-23 21:08:33,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,508 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 [2023-11-23 21:08:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,526 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 [2023-11-23 21:08:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,536 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 [2023-11-23 21:08:33,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,551 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 [2023-11-23 21:08:33,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,565 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 [2023-11-23 21:08:33,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,589 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 [2023-11-23 21:08:33,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,616 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 [2023-11-23 21:08:33,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,632 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 [2023-11-23 21:08:33,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,647 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 [2023-11-23 21:08:33,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,660 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 [2023-11-23 21:08:33,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,677 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 [2023-11-23 21:08:33,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,714 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 [2023-11-23 21:08:33,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:33,761 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 [2023-11-23 21:08:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,170 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 [2023-11-23 21:08:34,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,193 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 [2023-11-23 21:08:34,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,249 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 [2023-11-23 21:08:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,264 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 [2023-11-23 21:08:34,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,305 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 [2023-11-23 21:08:34,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,320 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 [2023-11-23 21:08:34,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,336 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 [2023-11-23 21:08:34,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,346 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 [2023-11-23 21:08:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,359 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 [2023-11-23 21:08:34,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:34,381 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 [2023-11-23 21:08:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:34,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:08:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:35,125 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:35,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655474376] [2023-11-23 21:08:35,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [655474376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:08:35,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1997472321] [2023-11-23 21:08:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:35,127 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:08:35,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:08:35,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:08:35,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-23 21:08:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:35,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:08:35,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:35,367 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 [2023-11-23 21:08:35,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,390 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 [2023-11-23 21:08:35,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,402 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 [2023-11-23 21:08:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,416 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 [2023-11-23 21:08:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,437 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 [2023-11-23 21:08:35,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,446 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 [2023-11-23 21:08:35,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,483 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 [2023-11-23 21:08:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,499 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 [2023-11-23 21:08:35,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,544 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 [2023-11-23 21:08:35,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,571 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 [2023-11-23 21:08:35,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,589 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 [2023-11-23 21:08:35,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,613 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 [2023-11-23 21:08:35,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,644 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 [2023-11-23 21:08:35,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,661 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 [2023-11-23 21:08:35,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,678 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 [2023-11-23 21:08:35,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,687 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 [2023-11-23 21:08:35,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,703 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 [2023-11-23 21:08:35,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,714 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 [2023-11-23 21:08:35,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,729 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 [2023-11-23 21:08:35,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,743 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 [2023-11-23 21:08:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,758 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 13 treesize of output 1 [2023-11-23 21:08:35,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,768 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 [2023-11-23 21:08:35,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,796 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 [2023-11-23 21:08:35,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:35,813 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 13 treesize of output 1 [2023-11-23 21:08:35,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:35,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:08:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1997472321] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:08:36,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793440257] [2023-11-23 21:08:36,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:36,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:08:36,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:08:36,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:08:36,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:08:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:36,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:08:36,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:36,198 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 [2023-11-23 21:08:36,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,215 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 [2023-11-23 21:08:36,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,233 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 [2023-11-23 21:08:36,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,256 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 [2023-11-23 21:08:36,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,270 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 [2023-11-23 21:08:36,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,279 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 [2023-11-23 21:08:36,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,293 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 [2023-11-23 21:08:36,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,306 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 [2023-11-23 21:08:36,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,322 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 [2023-11-23 21:08:36,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,346 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 [2023-11-23 21:08:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,357 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 [2023-11-23 21:08:36,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,370 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 [2023-11-23 21:08:36,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,404 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 [2023-11-23 21:08:36,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,445 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 [2023-11-23 21:08:36,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,462 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 [2023-11-23 21:08:36,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,487 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 [2023-11-23 21:08:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,505 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 [2023-11-23 21:08:36,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,531 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 [2023-11-23 21:08:36,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,562 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 [2023-11-23 21:08:36,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,577 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 [2023-11-23 21:08:36,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,593 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 [2023-11-23 21:08:36,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,603 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 [2023-11-23 21:08:36,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,614 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 [2023-11-23 21:08:36,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:36,629 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 [2023-11-23 21:08:36,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:36,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:08:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:36,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793440257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:08:36,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:08:36,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-23 21:08:36,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028691244] [2023-11-23 21:08:36,853 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:08:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:08:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:08:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:08:36,854 INFO L87 Difference]: Start difference. First operand 27648 states and 107071 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) [2023-11-23 21:08:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:41,594 INFO L93 Difference]: Finished difference Result 27666 states and 107098 transitions. [2023-11-23 21:08:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:08:41,596 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 [2023-11-23 21:08:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:41,796 INFO L225 Difference]: With dead ends: 27666 [2023-11-23 21:08:41,796 INFO L226 Difference]: Without dead ends: 27666 [2023-11-23 21:08:41,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:08:41,798 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:41,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 228 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-23 21:08:42,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27666 states. [2023-11-23 21:08:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27666 to 27666. [2023-11-23 21:08:43,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27666 states, 25114 states have (on average 4.264473998566537) internal successors, (107098), 27665 states have internal predecessors, (107098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27666 states to 27666 states and 107098 transitions. [2023-11-23 21:08:43,881 INFO L78 Accepts]: Start accepts. Automaton has 27666 states and 107098 transitions. Word has length 5 [2023-11-23 21:08:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:43,881 INFO L495 AbstractCegarLoop]: Abstraction has 27666 states and 107098 transitions. [2023-11-23 21:08:43,881 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) [2023-11-23 21:08:43,881 INFO L276 IsEmpty]: Start isEmpty. Operand 27666 states and 107098 transitions. [2023-11-23 21:08:43,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:08:43,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:43,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:08:43,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:44,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:44,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:44,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 21:08:44,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:44,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:44,486 INFO L85 PathProgramCache]: Analyzing trace with hash 847567260, now seen corresponding path program 1 times [2023-11-23 21:08:44,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:44,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704202332] [2023-11-23 21:08:44,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:44,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:44,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:44,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:44,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-23 21:08:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:44,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:08:44,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:44,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,742 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 21:08:44,743 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 [2023-11-23 21:08:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:08:44,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,852 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:08:44,853 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 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 21:08:44,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,883 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:08:44,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,944 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:08:44,945 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 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 21:08:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:44,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:45,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:45,029 INFO L349 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2023-11-23 21:08:45,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2023-11-23 21:08:45,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:45,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-23 21:08:45,138 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:08:45,139 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 [2023-11-23 21:08:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:45,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:45,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704202332] [2023-11-23 21:08:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704202332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:08:45,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458343273] [2023-11-23 21:08:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:45,178 INFO L87 Difference]: Start difference. First operand 27666 states and 107098 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:45,749 INFO L93 Difference]: Finished difference Result 22752 states and 86578 transitions. [2023-11-23 21:08:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:08:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:45,893 INFO L225 Difference]: With dead ends: 22752 [2023-11-23 21:08:45,893 INFO L226 Difference]: Without dead ends: 22752 [2023-11-23 21:08:45,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:45,895 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:45,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:08:45,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22752 states. [2023-11-23 21:08:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22752 to 22752. [2023-11-23 21:08:47,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22752 states, 20930 states have (on average 4.1365504061156235) internal successors, (86578), 22751 states have internal predecessors, (86578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22752 states to 22752 states and 86578 transitions. [2023-11-23 21:08:47,162 INFO L78 Accepts]: Start accepts. Automaton has 22752 states and 86578 transitions. Word has length 5 [2023-11-23 21:08:47,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:47,163 INFO L495 AbstractCegarLoop]: Abstraction has 22752 states and 86578 transitions. [2023-11-23 21:08:47,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22752 states and 86578 transitions. [2023-11-23 21:08:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:08:47,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:47,163 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:08:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:47,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:47,364 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:47,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:47,365 INFO L85 PathProgramCache]: Analyzing trace with hash 847567261, now seen corresponding path program 1 times [2023-11-23 21:08:47,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:47,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2030287131] [2023-11-23 21:08:47,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:47,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:47,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:47,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:47,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-23 21:08:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:47,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 21:08:47,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:47,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-23 21:08:47,606 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 [2023-11-23 21:08:47,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:47,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,715 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 [2023-11-23 21:08:47,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,756 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:08:47,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:08:47,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:08:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,881 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 [2023-11-23 21:08:47,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:47,912 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 [2023-11-23 21:08:47,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:47,972 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:47,972 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:47,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2030287131] [2023-11-23 21:08:47,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2030287131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:47,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:47,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:08:47,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20940481] [2023-11-23 21:08:47,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:47,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:47,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:47,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:47,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:47,975 INFO L87 Difference]: Start difference. First operand 22752 states and 86578 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:48,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:48,988 INFO L93 Difference]: Finished difference Result 17838 states and 66058 transitions. [2023-11-23 21:08:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:08:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:49,103 INFO L225 Difference]: With dead ends: 17838 [2023-11-23 21:08:49,104 INFO L226 Difference]: Without dead ends: 17838 [2023-11-23 21:08:49,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:49,105 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 181 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:49,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 22 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:08:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17838 states. [2023-11-23 21:08:49,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17838 to 17838. [2023-11-23 21:08:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17838 states, 16746 states have (on average 3.944703212707512) internal successors, (66058), 17837 states have internal predecessors, (66058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:49,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17838 states to 17838 states and 66058 transitions. [2023-11-23 21:08:49,735 INFO L78 Accepts]: Start accepts. Automaton has 17838 states and 66058 transitions. Word has length 5 [2023-11-23 21:08:49,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:49,735 INFO L495 AbstractCegarLoop]: Abstraction has 17838 states and 66058 transitions. [2023-11-23 21:08:49,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:49,736 INFO L276 IsEmpty]: Start isEmpty. Operand 17838 states and 66058 transitions. [2023-11-23 21:08:49,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:08:49,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:49,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:49,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:08:49,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:49,940 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:49,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:49,941 INFO L85 PathProgramCache]: Analyzing trace with hash -235543037, now seen corresponding path program 1 times [2023-11-23 21:08:49,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:49,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [374610003] [2023-11-23 21:08:49,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:49,942 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:49,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:49,943 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:49,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:08:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:08:50,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:08:50,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:08:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,518 INFO L224 Elim1Store]: Index analysis took 372 ms [2023-11-23 21:08:50,554 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 21:08:50,555 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 [2023-11-23 21:08:50,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,596 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 15 treesize of output 1 [2023-11-23 21:08:50,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,652 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:08:50,652 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 [2023-11-23 21:08:50,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,686 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 15 treesize of output 1 [2023-11-23 21:08:50,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,741 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:08:50,741 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 [2023-11-23 21:08:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 21:08:50,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,861 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:08:50,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 21:08:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-23 21:08:50,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:08:50,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2023-11-23 21:08:51,023 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:08:51,024 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 [2023-11-23 21:08:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:08:51,125 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:08:51,126 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:08:51,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [374610003] [2023-11-23 21:08:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [374610003] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:08:51,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:08:51,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:08:51,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497426079] [2023-11-23 21:08:51,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:08:51,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:08:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:08:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:08:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:51,130 INFO L87 Difference]: Start difference. First operand 17838 states and 66058 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) [2023-11-23 21:08:51,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:08:51,661 INFO L93 Difference]: Finished difference Result 17532 states and 65122 transitions. [2023-11-23 21:08:51,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:08:51,662 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 [2023-11-23 21:08:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:08:51,766 INFO L225 Difference]: With dead ends: 17532 [2023-11-23 21:08:51,767 INFO L226 Difference]: Without dead ends: 17532 [2023-11-23 21:08:51,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:08:51,768 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:08:51,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 23 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:08:51,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17532 states. [2023-11-23 21:08:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17532 to 17532. [2023-11-23 21:08:52,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17532 states, 16530 states have (on average 3.9396249243799155) internal successors, (65122), 17531 states have internal predecessors, (65122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:08:52,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17532 states to 17532 states and 65122 transitions. [2023-11-23 21:08:52,494 INFO L78 Accepts]: Start accepts. Automaton has 17532 states and 65122 transitions. Word has length 8 [2023-11-23 21:08:52,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:08:52,494 INFO L495 AbstractCegarLoop]: Abstraction has 17532 states and 65122 transitions. [2023-11-23 21:08:52,495 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) [2023-11-23 21:08:52,495 INFO L276 IsEmpty]: Start isEmpty. Operand 17532 states and 65122 transitions. [2023-11-23 21:08:52,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 21:08:52,496 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:08:52,496 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:08:52,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -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 [2023-11-23 21:08:52,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:52,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 21:08:52,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:08:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash -235543036, now seen corresponding path program 1 times [2023-11-23 21:08:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:08:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [964050779] [2023-11-23 21:08:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:08:52,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:08:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:08:52,703 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:08:52,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d50d0a64-a623-4cde-9e0c-226f1e97d0ad/bin/utaipan-verify-mE87zJ7Ire/mathsat -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