./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 11cd0b9da22b48a523bf90b6f5cbc98a0e4e6a8f70a83fae3d817f12f25f212c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:56:46,581 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:56:46,651 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 20:56:46,657 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:56:46,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:56:46,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:56:46,685 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:56:46,686 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:56:46,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:56:46,687 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:56:46,688 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:56:46,688 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:56:46,689 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:56:46,689 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 20:56:46,690 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:56:46,691 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:56:46,691 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 20:56:46,692 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 20:56:46,693 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:56:46,693 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 20:56:46,694 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 20:56:46,695 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 20:56:46,696 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:56:46,696 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:56:46,697 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:56:46,698 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:56:46,698 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:56:46,699 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:56:46,699 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:56:46,700 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:56:46,700 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:56:46,701 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:56:46,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:56:46,702 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:56:46,702 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:56:46,702 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:56:46,703 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:56:46,703 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:56:46,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:56:46,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:46,704 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:56:46,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:56:46,709 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 20:56:46,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 20:56:46,710 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:56:46,710 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:56:46,711 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_98040eec-3fb9-496a-b0e1-b0e17e27f370/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11cd0b9da22b48a523bf90b6f5cbc98a0e4e6a8f70a83fae3d817f12f25f212c [2023-11-06 20:56:46,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:56:47,020 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:56:47,024 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:56:47,025 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:56:47,027 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:56:47,028 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2023-11-06 20:56:50,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:56:50,516 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:56:50,516 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2023-11-06 20:56:50,542 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data/24f66939b/651d0ef37082484f8a7c381a350f2df6/FLAG5668f777c [2023-11-06 20:56:50,566 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data/24f66939b/651d0ef37082484f8a7c381a350f2df6 [2023-11-06 20:56:50,570 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:56:50,576 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:56:50,577 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:50,581 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:56:50,587 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:56:50,588 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:50" (1/1) ... [2023-11-06 20:56:50,589 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f6562d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:50, skipping insertion in model container [2023-11-06 20:56:50,590 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:50" (1/1) ... [2023-11-06 20:56:50,670 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:56:51,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:51,253 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 20:56:51,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2afc3f02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:51, skipping insertion in model container [2023-11-06 20:56:51,254 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:51,255 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-06 20:56:51,257 INFO L158 Benchmark]: Toolchain (without parser) took 680.74ms. Allocated memory is still 132.1MB. Free memory was 87.4MB in the beginning and 73.5MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 20:56:51,258 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 96.5MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 20:56:51,259 INFO L158 Benchmark]: CACSL2BoogieTranslator took 677.69ms. Allocated memory is still 132.1MB. Free memory was 87.4MB in the beginning and 73.5MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-06 20:56:51,261 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 96.5MB. Free memory is still 47.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 677.69ms. Allocated memory is still 132.1MB. Free memory was 87.4MB in the beginning and 73.5MB in the end (delta: 13.8MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 576]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 11cd0b9da22b48a523bf90b6f5cbc98a0e4e6a8f70a83fae3d817f12f25f212c --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 20:56:53,863 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 20:56:53,968 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-06 20:56:53,974 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 20:56:53,975 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 20:56:54,033 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 20:56:54,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 20:56:54,035 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 20:56:54,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 20:56:54,042 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 20:56:54,042 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 20:56:54,043 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 20:56:54,043 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 20:56:54,045 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 20:56:54,046 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 20:56:54,046 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 20:56:54,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 20:56:54,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 20:56:54,049 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 20:56:54,049 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 20:56:54,050 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 20:56:54,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 20:56:54,051 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 20:56:54,051 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 20:56:54,052 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 20:56:54,052 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 20:56:54,052 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 20:56:54,053 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 20:56:54,053 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-06 20:56:54,054 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-06 20:56:54,055 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 20:56:54,056 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 20:56:54,056 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 20:56:54,056 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 20:56:54,057 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 20:56:54,057 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 20:56:54,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:54,058 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 20:56:54,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 20:56:54,059 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-06 20:56:54,059 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-06 20:56:54,060 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 20:56:54,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 20:56:54,060 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_98040eec-3fb9-496a-b0e1-b0e17e27f370/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 11cd0b9da22b48a523bf90b6f5cbc98a0e4e6a8f70a83fae3d817f12f25f212c [2023-11-06 20:56:54,514 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 20:56:54,539 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 20:56:54,544 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 20:56:54,545 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 20:56:54,546 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 20:56:54,547 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2023-11-06 20:56:57,894 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 20:56:58,248 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 20:56:58,248 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/sv-benchmarks/c/ldv-memsafety/memleaks_test22_1-2.i [2023-11-06 20:56:58,279 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data/bf0b2302f/1f7493c704f443d589da04ad53d5e5ea/FLAG7efef5996 [2023-11-06 20:56:58,298 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/data/bf0b2302f/1f7493c704f443d589da04ad53d5e5ea [2023-11-06 20:56:58,303 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 20:56:58,305 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 20:56:58,309 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:58,309 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 20:56:58,315 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 20:56:58,316 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:58" (1/1) ... [2023-11-06 20:56:58,317 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6febd8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:58, skipping insertion in model container [2023-11-06 20:56:58,317 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 08:56:58" (1/1) ... [2023-11-06 20:56:58,395 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:56:58,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:58,938 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-06 20:56:58,954 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 20:56:59,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:59,039 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 20:56:59,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 20:56:59,170 WARN L672 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-06 20:56:59,179 INFO L206 MainTranslator]: Completed translation [2023-11-06 20:56:59,179 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59 WrapperNode [2023-11-06 20:56:59,180 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 20:56:59,181 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 20:56:59,181 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 20:56:59,181 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 20:56:59,189 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,212 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,242 INFO L138 Inliner]: procedures = 165, calls = 69, calls flagged for inlining = 23, calls inlined = 15, statements flattened = 101 [2023-11-06 20:56:59,242 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 20:56:59,243 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 20:56:59,243 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 20:56:59,243 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 20:56:59,254 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,254 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,259 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,272 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,276 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,279 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,281 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,286 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 20:56:59,287 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 20:56:59,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 20:56:59,288 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 20:56:59,289 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (1/1) ... [2023-11-06 20:56:59,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 20:56:59,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:56:59,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 20:56:59,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 20:56:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-06 20:56:59,364 INFO L130 BoogieDeclarations]: Found specification of procedure LDV_INIT_LIST_HEAD [2023-11-06 20:56:59,364 INFO L138 BoogieDeclarations]: Found implementation of procedure LDV_INIT_LIST_HEAD [2023-11-06 20:56:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-06 20:56:59,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-06 20:56:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 20:56:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 20:56:59,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 20:56:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 20:56:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-06 20:56:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 20:56:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 20:56:59,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 20:56:59,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 20:56:59,533 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 20:56:59,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 20:57:00,066 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 20:57:00,074 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 20:57:00,075 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-06 20:57:00,077 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:57:00 BoogieIcfgContainer [2023-11-06 20:57:00,077 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 20:57:00,080 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 20:57:00,080 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 20:57:00,084 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 20:57:00,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 08:56:58" (1/3) ... [2023-11-06 20:57:00,085 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7584f226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:57:00, skipping insertion in model container [2023-11-06 20:57:00,085 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 08:56:59" (2/3) ... [2023-11-06 20:57:00,086 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7584f226 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 08:57:00, skipping insertion in model container [2023-11-06 20:57:00,086 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 08:57:00" (3/3) ... [2023-11-06 20:57:00,087 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test22_1-2.i [2023-11-06 20:57:00,109 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 20:57:00,109 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-06 20:57:00,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 20:57:00,169 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;@3f667336, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 20:57:00,169 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-06 20:57:00,174 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:00,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:57:00,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:00,183 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:00,184 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:00,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash -668549309, now seen corresponding path program 1 times [2023-11-06 20:57:00,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:00,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463764408] [2023-11-06 20:57:00,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:00,206 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:57:00,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:00,212 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:00,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:00,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:57:00,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:00,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 20:57:00,557 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 20:57:00,558 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:00,559 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:00,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463764408] [2023-11-06 20:57:00,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463764408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:00,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:00,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:57:00,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994096828] [2023-11-06 20:57:00,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:00,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:57:00,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:57:00,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 20:57:00,613 INFO L87 Difference]: Start difference. First operand has 73 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:01,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:01,067 INFO L93 Difference]: Finished difference Result 92 states and 104 transitions. [2023-11-06 20:57:01,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:57:01,070 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-06 20:57:01,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:01,080 INFO L225 Difference]: With dead ends: 92 [2023-11-06 20:57:01,080 INFO L226 Difference]: Without dead ends: 90 [2023-11-06 20:57:01,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:57:01,093 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 27 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:01,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 251 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:57:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-06 20:57:01,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2023-11-06 20:57:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.58) internal successors, (79), 71 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:57:01,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2023-11-06 20:57:01,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 10 [2023-11-06 20:57:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:01,155 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2023-11-06 20:57:01,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2023-11-06 20:57:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-06 20:57:01,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:01,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:01,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,370 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:01,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:01,371 INFO L85 PathProgramCache]: Analyzing trace with hash -639920158, now seen corresponding path program 1 times [2023-11-06 20:57:01,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:01,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268272926] [2023-11-06 20:57:01,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:01,372 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 20:57:01,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:01,376 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:01,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:01,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:01,529 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 20:57:01,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:01,529 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:01,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268272926] [2023-11-06 20:57:01,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268272926] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:01,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:01,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:57:01,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239498149] [2023-11-06 20:57:01,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:01,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:57:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:57:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:01,533 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:01,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:01,569 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2023-11-06 20:57:01,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:57:01,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-06 20:57:01,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:01,571 INFO L225 Difference]: With dead ends: 75 [2023-11-06 20:57:01,571 INFO L226 Difference]: Without dead ends: 75 [2023-11-06 20:57:01,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:01,573 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 0 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:01,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 302 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-06 20:57:01,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2023-11-06 20:57:01,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:57:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2023-11-06 20:57:01,583 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 10 [2023-11-06 20:57:01,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:01,583 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2023-11-06 20:57:01,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2023-11-06 20:57:01,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 20:57:01,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:01,585 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:01,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,796 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:01,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 749807950, now seen corresponding path program 1 times [2023-11-06 20:57:01,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:01,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [763652317] [2023-11-06 20:57:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:01,798 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 20:57:01,798 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:01,799 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:01,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 20:57:01,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:01,904 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:57:02,077 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 20:57:02,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:02,079 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [763652317] [2023-11-06 20:57:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [763652317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:02,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:02,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 20:57:02,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966650977] [2023-11-06 20:57:02,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:02,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:57:02,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:02,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:57:02,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 20:57:02,084 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:02,460 INFO L93 Difference]: Finished difference Result 74 states and 81 transitions. [2023-11-06 20:57:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:57:02,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-06 20:57:02,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:02,464 INFO L225 Difference]: With dead ends: 74 [2023-11-06 20:57:02,464 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 20:57:02,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:57:02,466 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 24 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:02,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 308 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:57:02,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 20:57:02,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-11-06 20:57:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.530612244897959) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:57:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2023-11-06 20:57:02,475 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 11 [2023-11-06 20:57:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:02,475 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2023-11-06 20:57:02,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:02,476 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2023-11-06 20:57:02,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:57:02,476 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:02,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:02,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:02,689 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:02,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:02,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1769183241, now seen corresponding path program 1 times [2023-11-06 20:57:02,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:02,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [103720837] [2023-11-06 20:57:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:02,691 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 20:57:02,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:02,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:02,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:02,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:02,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:02,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:02,818 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 20:57:02,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:02,818 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [103720837] [2023-11-06 20:57:02,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [103720837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:02,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:02,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 20:57:02,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19286048] [2023-11-06 20:57:02,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:02,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 20:57:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:02,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 20:57:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:02,822 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:02,858 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-11-06 20:57:02,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:57:02,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 20:57:02,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:02,861 INFO L225 Difference]: With dead ends: 74 [2023-11-06 20:57:02,861 INFO L226 Difference]: Without dead ends: 74 [2023-11-06 20:57:02,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:02,864 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 16 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:02,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 269 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-06 20:57:02,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2023-11-06 20:57:02,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.510204081632653) internal successors, (74), 68 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:57:02,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2023-11-06 20:57:02,881 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 12 [2023-11-06 20:57:02,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:02,881 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2023-11-06 20:57:02,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:02,881 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2023-11-06 20:57:02,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-06 20:57:02,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:02,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:02,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:03,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:03,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:03,095 INFO L85 PathProgramCache]: Analyzing trace with hash -782973720, now seen corresponding path program 1 times [2023-11-06 20:57:03,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:03,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580681832] [2023-11-06 20:57:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:03,095 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:57:03,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:03,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:03,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (6)] Waiting until timeout for monitored process [2023-11-06 20:57:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:03,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 20:57:03,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:03,224 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 20:57:03,224 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:03,224 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:03,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580681832] [2023-11-06 20:57:03,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580681832] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:03,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:03,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:57:03,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047636769] [2023-11-06 20:57:03,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:03,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:57:03,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:03,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:57:03,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:57:03,227 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:03,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:03,265 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2023-11-06 20:57:03,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 20:57:03,266 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-06 20:57:03,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:03,267 INFO L225 Difference]: With dead ends: 80 [2023-11-06 20:57:03,267 INFO L226 Difference]: Without dead ends: 80 [2023-11-06 20:57:03,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 20:57:03,268 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 6 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:03,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 218 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:03,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-06 20:57:03,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2023-11-06 20:57:03,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.4901960784313726) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 20:57:03,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2023-11-06 20:57:03,276 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 12 [2023-11-06 20:57:03,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:03,277 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2023-11-06 20:57:03,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:03,277 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2023-11-06 20:57:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 20:57:03,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:03,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:03,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (6)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:03,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:03,479 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:03,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash -816988662, now seen corresponding path program 1 times [2023-11-06 20:57:03,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:03,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564236167] [2023-11-06 20:57:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:03,480 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 20:57:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:03,481 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:03,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (7)] Waiting until timeout for monitored process [2023-11-06 20:57:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:03,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:03,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:03,607 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 20:57:03,607 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:03,607 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:03,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564236167] [2023-11-06 20:57:03,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564236167] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:03,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:03,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 20:57:03,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729667115] [2023-11-06 20:57:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:03,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:57:03,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:03,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:57:03,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:57:03,610 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:03,752 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2023-11-06 20:57:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:57:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-06 20:57:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:03,753 INFO L225 Difference]: With dead ends: 78 [2023-11-06 20:57:03,753 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 20:57:03,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:57:03,754 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 8 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:03,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 162 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 20:57:03,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 20:57:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-06 20:57:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-11-06 20:57:03,759 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 14 [2023-11-06 20:57:03,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:03,759 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-11-06 20:57:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-11-06 20:57:03,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-06 20:57:03,760 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:03,760 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:03,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (7)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:03,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:03,973 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:03,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1730388367, now seen corresponding path program 1 times [2023-11-06 20:57:03,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:03,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1077400250] [2023-11-06 20:57:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:03,974 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 20:57:03,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:03,975 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:03,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (8)] Waiting until timeout for monitored process [2023-11-06 20:57:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:04,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 20:57:04,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:04,085 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 20:57:04,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:04,085 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:04,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1077400250] [2023-11-06 20:57:04,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1077400250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:04,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:04,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 20:57:04,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590340747] [2023-11-06 20:57:04,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:04,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 20:57:04,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:04,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 20:57:04,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:57:04,087 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:04,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:04,112 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2023-11-06 20:57:04,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 20:57:04,113 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-11-06 20:57:04,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:04,114 INFO L225 Difference]: With dead ends: 70 [2023-11-06 20:57:04,114 INFO L226 Difference]: Without dead ends: 70 [2023-11-06 20:57:04,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 20:57:04,115 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 3 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:04,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 208 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-06 20:57:04,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-11-06 20:57:04,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.5106382978723405) internal successors, (71), 66 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-11-06 20:57:04,121 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 16 [2023-11-06 20:57:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:04,121 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-11-06 20:57:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-11-06 20:57:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:57:04,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:04,122 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:04,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (8)] Ended with exit code 0 [2023-11-06 20:57:04,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:04,335 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:04,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:04,335 INFO L85 PathProgramCache]: Analyzing trace with hash 2133276344, now seen corresponding path program 1 times [2023-11-06 20:57:04,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:04,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454109264] [2023-11-06 20:57:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:04,336 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 20:57:04,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:04,337 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:04,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (9)] Waiting until timeout for monitored process [2023-11-06 20:57:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:04,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:04,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:04,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:04,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:04,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:04,534 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:04,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454109264] [2023-11-06 20:57:04,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454109264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:04,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [35242206] [2023-11-06 20:57:04,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:04,535 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:04,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:04,537 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:04,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-11-06 20:57:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:04,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:04,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:04,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:04,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:04,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [35242206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:04,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006889020] [2023-11-06 20:57:04,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:04,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:04,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:04,748 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:04,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 20:57:04,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:04,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 20:57:04,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:04,869 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 20:57:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 20:57:05,007 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:05,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006889020] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:05,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-06 20:57:05,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5, 5, 5, 5] total 14 [2023-11-06 20:57:05,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548066138] [2023-11-06 20:57:05,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:05,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:57:05,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:57:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-11-06 20:57:05,009 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:05,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:05,399 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-11-06 20:57:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:57:05,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-06 20:57:05,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:05,401 INFO L225 Difference]: With dead ends: 69 [2023-11-06 20:57:05,401 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 20:57:05,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-06 20:57:05,402 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 25 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:05,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 289 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:57:05,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 20:57:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-06 20:57:05,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.4893617021276595) internal successors, (70), 65 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:05,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2023-11-06 20:57:05,407 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 17 [2023-11-06 20:57:05,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:05,407 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2023-11-06 20:57:05,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:05,407 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2023-11-06 20:57:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-06 20:57:05,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:05,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:05,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:05,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:05,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (9)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:06,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:06,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:06,012 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:06,012 INFO L85 PathProgramCache]: Analyzing trace with hash 2133276345, now seen corresponding path program 1 times [2023-11-06 20:57:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:06,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2012526134] [2023-11-06 20:57:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:06,013 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 20:57:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:06,014 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:06,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (12)] Waiting until timeout for monitored process [2023-11-06 20:57:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:06,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:06,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:06,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:06,138 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:06,194 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2012526134] [2023-11-06 20:57:06,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2012526134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [204964140] [2023-11-06 20:57:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:06,195 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:06,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:06,196 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:06,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-11-06 20:57:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:06,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:06,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:06,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:06,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:06,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [204964140] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:06,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228644806] [2023-11-06 20:57:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:06,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:06,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:06,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:06,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 20:57:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:06,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 20:57:06,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:06,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:06,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:06,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228644806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:06,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-06 20:57:06,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2023-11-06 20:57:06,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027132430] [2023-11-06 20:57:06,550 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-06 20:57:06,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 20:57:06,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:06,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 20:57:06,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 20:57:06,552 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:06,630 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2023-11-06 20:57:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:57:06,631 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-11-06 20:57:06,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:06,632 INFO L225 Difference]: With dead ends: 72 [2023-11-06 20:57:06,632 INFO L226 Difference]: Without dead ends: 72 [2023-11-06 20:57:06,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-06 20:57:06,633 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 10 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:06,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 273 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:06,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-06 20:57:06,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-06 20:57:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 50 states have (on average 1.46) internal successors, (73), 68 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2023-11-06 20:57:06,646 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 17 [2023-11-06 20:57:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:06,647 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2023-11-06 20:57:06,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:06,647 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2023-11-06 20:57:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-06 20:57:06,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:06,648 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:06,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:06,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:07,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (12)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:07,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:07,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:07,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:07,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1089714226, now seen corresponding path program 2 times [2023-11-06 20:57:07,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:07,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2042821317] [2023-11-06 20:57:07,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-06 20:57:07,252 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 20:57:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:07,253 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:07,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (15)] Waiting until timeout for monitored process [2023-11-06 20:57:07,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-06 20:57:07,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 20:57:07,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-06 20:57:07,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:07,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:57:07,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:07,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:07,602 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:07,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2042821317] [2023-11-06 20:57:07,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2042821317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:07,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 20:57:07,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-06 20:57:07,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512667840] [2023-11-06 20:57:07,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:07,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:57:07,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:07,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:57:07,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-06 20:57:07,604 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:08,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:08,078 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2023-11-06 20:57:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:57:08,081 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-11-06 20:57:08,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:08,082 INFO L225 Difference]: With dead ends: 71 [2023-11-06 20:57:08,082 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 20:57:08,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-11-06 20:57:08,083 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 23 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:08,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 382 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:57:08,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 20:57:08,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-06 20:57:08,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.44) internal successors, (72), 67 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2023-11-06 20:57:08,087 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 20 [2023-11-06 20:57:08,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:08,088 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2023-11-06 20:57:08,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2023-11-06 20:57:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-06 20:57:08,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:08,089 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:08,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (15)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:08,296 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:08,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash -758157071, now seen corresponding path program 1 times [2023-11-06 20:57:08,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [937288461] [2023-11-06 20:57:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:08,297 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 20:57:08,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:08,298 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:08,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (16)] Waiting until timeout for monitored process [2023-11-06 20:57:08,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:08,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:08,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:08,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:08,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:08,738 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:08,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [937288461] [2023-11-06 20:57:08,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [937288461] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:08,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752648567] [2023-11-06 20:57:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:08,739 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:08,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:08,740 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:08,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-06 20:57:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:08,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 20:57:08,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:08,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:08,993 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:08,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752648567] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:08,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:57:08,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 8] total 18 [2023-11-06 20:57:08,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961557136] [2023-11-06 20:57:08,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:08,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 20:57:08,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:08,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 20:57:08,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-06 20:57:08,995 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:09,047 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2023-11-06 20:57:09,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 20:57:09,048 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-11-06 20:57:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:09,049 INFO L225 Difference]: With dead ends: 71 [2023-11-06 20:57:09,049 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 20:57:09,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:57:09,050 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 14 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:09,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 307 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:09,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 20:57:09,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-11-06 20:57:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.42) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:09,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-11-06 20:57:09,053 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2023-11-06 20:57:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:09,054 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-11-06 20:57:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-11-06 20:57:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:57:09,055 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:09,055 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:09,060 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2023-11-06 20:57:09,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (16)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:09,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:09,458 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting LDV_INIT_LIST_HEADErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:09,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:09,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1290729472, now seen corresponding path program 1 times [2023-11-06 20:57:09,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:09,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109255868] [2023-11-06 20:57:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:09,459 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 20:57:09,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:09,460 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:09,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (18)] Waiting until timeout for monitored process [2023-11-06 20:57:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:09,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:09,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:09,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:09,896 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:09,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:09,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109255868] [2023-11-06 20:57:09,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109255868] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:09,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [100058275] [2023-11-06 20:57:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:09,897 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:09,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:09,900 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:09,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-11-06 20:57:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:10,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:10,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:10,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:10,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [100058275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:10,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185651250] [2023-11-06 20:57:10,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:10,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:10,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:10,186 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:10,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 20:57:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:10,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 20:57:10,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:10,333 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 20:57:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:10,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:10,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185651250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:10,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-06 20:57:10,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8] total 21 [2023-11-06 20:57:10,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46637195] [2023-11-06 20:57:10,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:10,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:57:10,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:57:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-06 20:57:10,565 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:10,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:10,983 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2023-11-06 20:57:10,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 20:57:10,984 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-06 20:57:10,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:10,985 INFO L225 Difference]: With dead ends: 69 [2023-11-06 20:57:10,985 INFO L226 Difference]: Without dead ends: 69 [2023-11-06 20:57:10,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2023-11-06 20:57:10,986 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 26 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:10,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 299 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:57:10,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-06 20:57:10,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-06 20:57:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.38) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:10,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2023-11-06 20:57:10,990 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 24 [2023-11-06 20:57:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:10,991 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2023-11-06 20:57:10,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2023-11-06 20:57:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:57:10,992 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:10,992 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:10,996 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-11-06 20:57:11,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (18)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:11,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:11,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:11,595 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting LDV_INIT_LIST_HEADErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:11,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:11,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1290729471, now seen corresponding path program 1 times [2023-11-06 20:57:11,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:11,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455488110] [2023-11-06 20:57:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:11,597 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 20:57:11,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:11,598 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:11,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (21)] Waiting until timeout for monitored process [2023-11-06 20:57:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:11,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:11,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:11,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:12,069 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455488110] [2023-11-06 20:57:12,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455488110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:12,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977392878] [2023-11-06 20:57:12,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:12,069 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:12,072 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:12,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-11-06 20:57:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:12,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:12,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:12,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:12,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:12,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [977392878] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:12,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427409708] [2023-11-06 20:57:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:12,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:12,392 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:12,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 20:57:12,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:12,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 20:57:12,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:12,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:57:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:12,970 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:12,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427409708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-06 20:57:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 8, 8] total 22 [2023-11-06 20:57:12,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550102936] [2023-11-06 20:57:12,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:12,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 20:57:12,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 20:57:12,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-06 20:57:12,974 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:13,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:13,497 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2023-11-06 20:57:13,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:57:13,498 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-06 20:57:13,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:13,499 INFO L225 Difference]: With dead ends: 67 [2023-11-06 20:57:13,499 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 20:57:13,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-06 20:57:13,500 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 24 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:13,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 391 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 20:57:13,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 20:57:13,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-06 20:57:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.34) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2023-11-06 20:57:13,503 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 24 [2023-11-06 20:57:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:13,504 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2023-11-06 20:57:13,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2023-11-06 20:57:13,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 20:57:13,505 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:13,505 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:13,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:13,724 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (21)] Ended with exit code 0 [2023-11-06 20:57:13,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:14,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:14,113 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:14,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:14,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1341413475, now seen corresponding path program 1 times [2023-11-06 20:57:14,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:14,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [18069051] [2023-11-06 20:57:14,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:14,115 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 20:57:14,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:14,116 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:14,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (24)] Waiting until timeout for monitored process [2023-11-06 20:57:14,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:14,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:14,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:14,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:14,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:14,554 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [18069051] [2023-11-06 20:57:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [18069051] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [126829925] [2023-11-06 20:57:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:14,554 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:14,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:14,563 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:14,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-11-06 20:57:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:14,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 20:57:14,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:14,889 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:14,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [126829925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:14,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:57:14,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-11-06 20:57:14,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560508713] [2023-11-06 20:57:14,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:14,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:57:14,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:14,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:57:14,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:57:14,891 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:14,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:14,981 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2023-11-06 20:57:14,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 20:57:14,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-11-06 20:57:14,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:14,984 INFO L225 Difference]: With dead ends: 67 [2023-11-06 20:57:14,984 INFO L226 Difference]: Without dead ends: 67 [2023-11-06 20:57:14,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-06 20:57:14,985 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 15 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:14,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 337 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-06 20:57:14,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2023-11-06 20:57:14,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 50 states have (on average 1.32) internal successors, (66), 62 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:14,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2023-11-06 20:57:14,988 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 24 [2023-11-06 20:57:14,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:14,988 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2023-11-06 20:57:14,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-06 20:57:14,988 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2023-11-06 20:57:14,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 20:57:14,989 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:14,989 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:15,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (24)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:15,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:15,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:15,390 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:15,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:15,390 INFO L85 PathProgramCache]: Analyzing trace with hash -506543622, now seen corresponding path program 1 times [2023-11-06 20:57:15,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:15,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [408264242] [2023-11-06 20:57:15,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:15,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-06 20:57:15,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:15,392 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:15,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (26)] Waiting until timeout for monitored process [2023-11-06 20:57:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:15,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:15,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:15,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:15,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:15,859 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [408264242] [2023-11-06 20:57:15,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [408264242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [806796649] [2023-11-06 20:57:15,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:15,860 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:15,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:15,861 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:15,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-11-06 20:57:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:16,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:16,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:16,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:16,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:16,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:16,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [806796649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:16,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790273508] [2023-11-06 20:57:16,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:16,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:16,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:16,161 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:16,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-06 20:57:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:16,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 20:57:16,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:16,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-06 20:57:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:16,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:16,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790273508] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:16,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-06 20:57:16,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8, 8, 8] total 21 [2023-11-06 20:57:16,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562014548] [2023-11-06 20:57:16,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:16,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 20:57:16,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:16,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 20:57:16,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-06 20:57:16,603 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:17,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:17,033 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2023-11-06 20:57:17,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 20:57:17,033 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-06 20:57:17,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:17,034 INFO L225 Difference]: With dead ends: 71 [2023-11-06 20:57:17,034 INFO L226 Difference]: Without dead ends: 71 [2023-11-06 20:57:17,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-11-06 20:57:17,035 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 58 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:17,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 224 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:57:17,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-06 20:57:17,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2023-11-06 20:57:17,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 50 states have (on average 1.28) internal successors, (64), 60 states have internal predecessors, (64), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:17,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-06 20:57:17,057 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 32 [2023-11-06 20:57:17,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:17,057 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-06 20:57:17,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:17,057 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-06 20:57:17,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-06 20:57:17,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:17,058 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:17,073 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:17,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (26)] Ended with exit code 0 [2023-11-06 20:57:17,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:17,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:17,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -506543621, now seen corresponding path program 1 times [2023-11-06 20:57:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667417979] [2023-11-06 20:57:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:17,670 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 20:57:17,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:17,672 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:17,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (29)] Waiting until timeout for monitored process [2023-11-06 20:57:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:17,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:17,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:17,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:18,167 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:18,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667417979] [2023-11-06 20:57:18,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667417979] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:18,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1367076149] [2023-11-06 20:57:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:18,167 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:18,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:18,168 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:18,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2023-11-06 20:57:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:18,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:18,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:18,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:18,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1367076149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066651980] [2023-11-06 20:57:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:18,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:18,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:18,523 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:18,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-06 20:57:18,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:18,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-06 20:57:18,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:18,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-06 20:57:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:19,185 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:19,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066651980] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:19,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2023-11-06 20:57:19,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8, 8, 8] total 22 [2023-11-06 20:57:19,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561026865] [2023-11-06 20:57:19,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:19,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-06 20:57:19,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:19,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-06 20:57:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-06 20:57:19,188 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:19,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:19,677 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-11-06 20:57:19,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 20:57:19,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-06 20:57:19,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:19,679 INFO L225 Difference]: With dead ends: 63 [2023-11-06 20:57:19,679 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 20:57:19,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2023-11-06 20:57:19,680 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 105 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:19,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 262 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 20:57:19,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 20:57:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-06 20:57:19,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.24) internal successors, (62), 58 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:19,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2023-11-06 20:57:19,683 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 32 [2023-11-06 20:57:19,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:19,683 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2023-11-06 20:57:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2023-11-06 20:57:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-06 20:57:19,698 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:19,698 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:19,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (30)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:19,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (29)] Ended with exit code 0 [2023-11-06 20:57:20,108 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-06 20:57:20,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:20,303 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:20,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:20,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1455636836, now seen corresponding path program 1 times [2023-11-06 20:57:20,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:20,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [484007347] [2023-11-06 20:57:20,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:20,304 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 20:57:20,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:20,305 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:20,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (32)] Waiting until timeout for monitored process [2023-11-06 20:57:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:20,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:20,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:20,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:20,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:20,811 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:20,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [484007347] [2023-11-06 20:57:20,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [484007347] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696126649] [2023-11-06 20:57:20,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:20,812 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:20,813 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:20,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-11-06 20:57:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:21,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 20:57:21,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:21,184 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 20:57:21,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 20:57:21,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696126649] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 20:57:21,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 20:57:21,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 19 [2023-11-06 20:57:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133395151] [2023-11-06 20:57:21,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 20:57:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 20:57:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-06 20:57:21,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 20:57:21,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-11-06 20:57:21,186 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 20:57:21,266 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2023-11-06 20:57:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 20:57:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2023-11-06 20:57:21,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 20:57:21,268 INFO L225 Difference]: With dead ends: 63 [2023-11-06 20:57:21,268 INFO L226 Difference]: Without dead ends: 63 [2023-11-06 20:57:21,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-11-06 20:57:21,269 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 67 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 20:57:21,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 250 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 20:57:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-06 20:57:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-06 20:57:21,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.22) internal successors, (61), 58 states have internal predecessors, (61), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:21,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-11-06 20:57:21,273 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 34 [2023-11-06 20:57:21,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 20:57:21,274 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-11-06 20:57:21,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 20:57:21,274 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-11-06 20:57:21,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-06 20:57:21,276 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 20:57:21,276 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 20:57:21,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (32)] Forceful destruction successful, exit code 0 [2023-11-06 20:57:21,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-11-06 20:57:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:21,677 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-06 20:57:21,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 20:57:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 981197118, now seen corresponding path program 1 times [2023-11-06 20:57:21,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-06 20:57:21,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544777155] [2023-11-06 20:57:21,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:21,678 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 20:57:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/mathsat [2023-11-06 20:57:21,679 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 20:57:21,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/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 (34)] Waiting until timeout for monitored process [2023-11-06 20:57:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:21,896 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:21,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:21,979 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:21,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:22,205 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-06 20:57:22,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544777155] [2023-11-06 20:57:22,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544777155] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:22,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1131090754] [2023-11-06 20:57:22,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:22,206 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-06 20:57:22,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 [2023-11-06 20:57:22,208 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-06 20:57:22,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2023-11-06 20:57:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:22,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 20:57:22,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:22,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:22,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 20:57:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 20:57:22,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1131090754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 20:57:22,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656640516] [2023-11-06 20:57:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 20:57:22,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 20:57:22,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 20:57:22,621 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 20:57:22,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_98040eec-3fb9-496a-b0e1-b0e17e27f370/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-06 20:57:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 20:57:22,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-06 20:57:22,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 20:57:22,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7