./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:33:48,435 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:33:48,552 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:33:48,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:33:48,560 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:33:48,599 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:33:48,600 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:33:48,601 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:33:48,602 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:33:48,607 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:33:48,607 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:33:48,609 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:33:48,609 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:33:48,611 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:33:48,611 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:33:48,612 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:33:48,612 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:33:48,613 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:33:48,613 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:33:48,614 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:33:48,614 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:33:48,615 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:33:48,615 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:33:48,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:33:48,616 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:33:48,617 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:33:48,617 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:33:48,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:33:48,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:33:48,618 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:33:48,620 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:33:48,620 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:33:48,620 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:33:48,620 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:33:48,621 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:33:48,621 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:33:48,621 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:33:48,621 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:33:48,622 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:33:48,622 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:48,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:33:48,623 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:33:48,623 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:33:48,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:33:48,624 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:33:48,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:33:48,624 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_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2023-11-06 20:33:48,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:33:48,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:33:48,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:33:48,950 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:33:48,952 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:33:48,953 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-06 20:33:52,077 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:33:52,318 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:33:52,318 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-06 20:33:52,328 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data/d1fa2c82c/e45fe01a614b4993a9c2b51eeda6ead1/FLAGe2909ede8 [2023-11-06 20:33:52,350 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data/d1fa2c82c/e45fe01a614b4993a9c2b51eeda6ead1 [2023-11-06 20:33:52,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:33:52,359 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:33:52,363 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:52,364 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:33:52,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:33:52,370 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:52" (1/1) ... [2023-11-06 20:33:52,371 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ede1c09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:52, skipping insertion in model container [2023-11-06 20:33:52,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:52" (1/1) ... [2023-11-06 20:33:52,408 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:33:52,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:52,612 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) [2023-11-06 20:33:52,613 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@609767c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:52, skipping insertion in model container [2023-11-06 20:33:52,613 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:52,614 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 20:33:52,616 INFO L158 Benchmark]: Toolchain (without parser) took 255.58ms. Allocated memory is still 155.2MB. Free memory was 112.7MB in the beginning and 103.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 20:33:52,616 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 56.2MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 20:33:52,617 INFO L158 Benchmark]: CACSL2BoogieTranslator took 250.29ms. Allocated memory is still 155.2MB. Free memory was 112.7MB in the beginning and 103.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-06 20:33:52,619 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 56.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 250.29ms. Allocated memory is still 155.2MB. Free memory was 112.7MB in the beginning and 103.1MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 103]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:33:55,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:33:55,174 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-06 20:33:55,188 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:33:55,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:33:55,250 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:33:55,251 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:33:55,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:33:55,252 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:33:55,257 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:33:55,258 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:33:55,258 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:33:55,259 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:33:55,261 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:33:55,261 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:33:55,262 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:33:55,262 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:33:55,263 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:33:55,264 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:33:55,265 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:33:55,265 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:33:55,266 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:33:55,266 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:33:55,267 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:33:55,267 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:33:55,268 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:33:55,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:33:55,268 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:33:55,269 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 20:33:55,269 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 20:33:55,271 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:33:55,271 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:33:55,271 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:33:55,272 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:33:55,272 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 20:33:55,272 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:33:55,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:55,274 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:33:55,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:33:55,274 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-06 20:33:55,274 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 20:33:55,275 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:33:55,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:33:55,275 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_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8915194b3978f524e3b82313f6c905aed9b5c215c3d66b411e7857ee0b93981 [2023-11-06 20:33:55,729 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:33:55,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:33:55,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:33:55,760 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:33:55,760 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:33:55,761 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-06 20:33:58,843 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:33:59,131 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:33:59,132 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/sv-benchmarks/c/weaver/popl20-send-receive-alt.wvr.c [2023-11-06 20:33:59,139 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data/ade925244/049934c333584def8d024ab64e54f1f9/FLAG1d91381d4 [2023-11-06 20:33:59,154 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/data/ade925244/049934c333584def8d024ab64e54f1f9 [2023-11-06 20:33:59,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:33:59,159 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:33:59,160 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:59,161 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:33:59,169 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:33:59,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,171 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6695590d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59, skipping insertion in model container [2023-11-06 20:33:59,171 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,196 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:33:59,470 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:59,504 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 20:33:59,518 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:33:59,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:59,562 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:33:59,609 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:33:59,623 WARN L672 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:33:59,625 WARN L672 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:33:59,634 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:33:59,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59 WrapperNode [2023-11-06 20:33:59,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:33:59,637 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:33:59,637 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:33:59,638 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:33:59,646 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,675 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,736 INFO L138 Inliner]: procedures = 26, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 146 [2023-11-06 20:33:59,737 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:33:59,738 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:33:59,739 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:33:59,739 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:33:59,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,798 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,835 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,835 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,862 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,865 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,877 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:33:59,879 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:33:59,881 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:33:59,881 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:33:59,882 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (1/1) ... [2023-11-06 20:33:59,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:33:59,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:33:59,927 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:33:59,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:33:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:33:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-06 20:33:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 20:33:59,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 20:33:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-06 20:33:59,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-06 20:33:59,979 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-06 20:33:59,979 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-06 20:33:59,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-06 20:33:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-06 20:33:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:33:59,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:33:59,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:33:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:33:59,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 20:33:59,985 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-06 20:34:00,145 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:34:00,148 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:34:00,695 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:34:00,901 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:34:00,902 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-06 20:34:00,904 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:34:00 BoogieIcfgContainer [2023-11-06 20:34:00,904 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:34:00,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:34:00,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:34:00,911 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:34:00,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:33:59" (1/3) ... [2023-11-06 20:34:00,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab47dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:34:00, skipping insertion in model container [2023-11-06 20:34:00,913 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:33:59" (2/3) ... [2023-11-06 20:34:00,913 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ab47dc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:34:00, skipping insertion in model container [2023-11-06 20:34:00,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:34:00" (3/3) ... [2023-11-06 20:34:00,915 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-11-06 20:34:00,933 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:34:00,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2023-11-06 20:34:00,933 INFO L519 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-06 20:34:01,033 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-06 20:34:01,084 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-06 20:34:01,104 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 151 places, 155 transitions, 324 flow [2023-11-06 20:34:01,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 151 places, 155 transitions, 324 flow [2023-11-06 20:34:01,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 155 transitions, 324 flow [2023-11-06 20:34:01,226 INFO L124 PetriNetUnfolderBase]: 11/153 cut-off events. [2023-11-06 20:34:01,227 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-06 20:34:01,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 153 events. 11/153 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 92. Up to 2 conditions per place. [2023-11-06 20:34:01,236 INFO L119 LiptonReduction]: Number of co-enabled transitions 1378 [2023-11-06 20:34:22,138 INFO L134 LiptonReduction]: Checked pairs total: 1746 [2023-11-06 20:34:22,139 INFO L136 LiptonReduction]: Total number of compositions: 177 [2023-11-06 20:34:22,146 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 40 places, 36 transitions, 86 flow [2023-11-06 20:34:22,176 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:22,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:34:22,201 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;@1dfe8658, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:34:22,202 INFO L358 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2023-11-06 20:34:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:22,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:34:22,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:22,210 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:34:22,211 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:34:22,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:22,216 INFO L85 PathProgramCache]: Analyzing trace with hash 22157, now seen corresponding path program 1 times [2023-11-06 20:34:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:34:22,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1439525222] [2023-11-06 20:34:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:22,230 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 [2023-11-06 20:34:22,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:34:22,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:34:22,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:34:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:22,379 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 20:34:22,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:34:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:22,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-06 20:34:22,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:22,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-06 20:34:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:22,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:22,559 INFO L351 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 [2023-11-06 20:34:22,582 INFO L351 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 [2023-11-06 20:34:22,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:34:22,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:34:22,624 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:34:22,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1439525222] [2023-11-06 20:34:22,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1439525222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:22,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:22,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:22,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092995948] [2023-11-06 20:34:22,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:22,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:34:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:22,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:22,660 INFO L87 Difference]: Start difference. First operand has 166 states, 100 states have (on average 4.07) internal successors, (407), 165 states have internal predecessors, (407), 0 states have call successors, (0), 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 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:22,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:22,861 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2023-11-06 20:34:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:34:22,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2023-11-06 20:34:22,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:22,876 INFO L225 Difference]: With dead ends: 136 [2023-11-06 20:34:22,877 INFO L226 Difference]: Without dead ends: 136 [2023-11-06 20:34:22,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:22,882 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 29 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:22,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:34:22,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-06 20:34:22,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-11-06 20:34:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 87 states have (on average 3.689655172413793) internal successors, (321), 135 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 321 transitions. [2023-11-06 20:34:22,933 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 321 transitions. Word has length 2 [2023-11-06 20:34:22,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:22,935 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 321 transitions. [2023-11-06 20:34:22,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:22,935 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 321 transitions. [2023-11-06 20:34:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:34:22,936 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:22,936 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:34:22,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:34:23,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:34:23,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:34:23,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 22158, now seen corresponding path program 1 times [2023-11-06 20:34:23,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:34:23,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1008264460] [2023-11-06 20:34:23,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:23,151 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 [2023-11-06 20:34:23,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:34:23,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:34:23,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:34:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:23,218 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 20:34:23,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:34:23,242 INFO L322 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-06 20:34:23,243 INFO L351 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 19 treesize of output 22 [2023-11-06 20:34:23,281 INFO L322 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2023-11-06 20:34:23,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 22 [2023-11-06 20:34:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:34:23,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:34:23,312 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:34:23,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1008264460] [2023-11-06 20:34:23,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1008264460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:23,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:23,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:23,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060384955] [2023-11-06 20:34:23,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:23,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:23,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:34:23,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:23,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:23,318 INFO L87 Difference]: Start difference. First operand 136 states and 321 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:23,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:23,514 INFO L93 Difference]: Finished difference Result 107 states and 236 transitions. [2023-11-06 20:34:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:34:23,515 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2023-11-06 20:34:23,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:23,517 INFO L225 Difference]: With dead ends: 107 [2023-11-06 20:34:23,517 INFO L226 Difference]: Without dead ends: 107 [2023-11-06 20:34:23,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:23,519 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:23,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:34:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-06 20:34:23,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-06 20:34:23,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 74 states have (on average 3.189189189189189) internal successors, (236), 106 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 236 transitions. [2023-11-06 20:34:23,534 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 236 transitions. Word has length 2 [2023-11-06 20:34:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:23,534 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 236 transitions. [2023-11-06 20:34:23,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:23,535 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 236 transitions. [2023-11-06 20:34:23,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:34:23,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:23,535 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:34:23,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:34:23,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:34:23,747 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:34:23,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:23,749 INFO L85 PathProgramCache]: Analyzing trace with hash 22087, now seen corresponding path program 1 times [2023-11-06 20:34:23,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:34:23,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2130825078] [2023-11-06 20:34:23,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:23,751 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:34:23,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:34:23,752 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:34:23,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:34:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:23,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:34:23,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:34:23,837 INFO L351 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 [2023-11-06 20:34:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:23,851 INFO L351 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 [2023-11-06 20:34:23,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:23,866 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-06 20:34:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:23,874 INFO L351 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 [2023-11-06 20:34:23,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:23,901 INFO L351 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 [2023-11-06 20:34:23,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:23,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-06 20:34:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:34:23,922 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:34:23,922 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:34:23,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2130825078] [2023-11-06 20:34:23,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2130825078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:23,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:23,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:23,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734554709] [2023-11-06 20:34:23,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:23,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:23,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:34:23,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:23,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:23,939 INFO L87 Difference]: Start difference. First operand 107 states and 236 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:34:24,120 INFO L93 Difference]: Finished difference Result 106 states and 235 transitions. [2023-11-06 20:34:24,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 20:34:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 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 2 [2023-11-06 20:34:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:34:24,123 INFO L225 Difference]: With dead ends: 106 [2023-11-06 20:34:24,123 INFO L226 Difference]: Without dead ends: 106 [2023-11-06 20:34:24,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:24,125 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 2 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 20:34:24,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 2 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 20:34:24,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-06 20:34:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-11-06 20:34:24,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 74 states have (on average 3.175675675675676) internal successors, (235), 105 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:24,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 235 transitions. [2023-11-06 20:34:24,137 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 235 transitions. Word has length 2 [2023-11-06 20:34:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:34:24,138 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 235 transitions. [2023-11-06 20:34:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 20:34:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 235 transitions. [2023-11-06 20:34:24,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-06 20:34:24,139 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:34:24,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2023-11-06 20:34:24,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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 [2023-11-06 20:34:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:34:24,359 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2023-11-06 20:34:24,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:34:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash 22089, now seen corresponding path program 1 times [2023-11-06 20:34:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:34:24,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1927228417] [2023-11-06 20:34:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:34:24,360 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 [2023-11-06 20:34:24,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:34:24,362 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -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) [2023-11-06 20:34:24,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_348f1966-7052-402a-bba9-46e4d053779e/bin/utaipan-verify-FOvIYxoinp/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-06 20:34:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:34:24,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:34:24,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:34:24,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-06 20:34:24,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:24,471 INFO L351 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 [2023-11-06 20:34:24,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:24,484 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-06 20:34:24,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:24,492 INFO L351 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 [2023-11-06 20:34:24,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:24,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select 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 [2023-11-06 20:34:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 20:34:24,531 INFO L351 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 [2023-11-06 20:34:24,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:34:24,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:34:24,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:34:24,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1927228417] [2023-11-06 20:34:24,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1927228417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:34:24,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:34:24,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 20:34:24,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631733646] [2023-11-06 20:34:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:34:24,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 20:34:24,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:34:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 20:34:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 20:34:24,566 INFO L87 Difference]: Start difference. First operand 106 states and 235 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)