./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:39,095 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:39,167 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 20:32:39,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:39,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:39,202 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:39,202 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:39,203 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:39,204 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:39,204 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:39,205 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:39,205 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:39,206 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:39,206 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:32:39,207 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:39,207 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:39,208 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:32:39,208 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:32:39,209 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:39,209 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:32:39,210 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:32:39,211 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:32:39,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:32:39,212 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:32:39,212 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:39,213 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:39,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:39,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:39,214 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:39,214 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:32:39,215 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:32:39,215 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:32:39,215 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:39,215 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:32:39,216 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:32:39,216 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:39,216 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:39,216 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:39,217 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:39,217 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:39,217 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:39,218 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:39,218 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:39,218 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:32:39,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:32:39,218 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:39,219 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:39,219 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:39,219 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_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2023-11-23 20:32:39,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:39,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:39,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:39,482 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:39,483 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:39,484 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-11-23 20:32:42,532 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:42,826 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:42,827 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-11-23 20:32:42,871 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data/078da1a9f/975cbb2196004f728ce83f726d480627/FLAG9f4897bd2 [2023-11-23 20:32:42,886 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data/078da1a9f/975cbb2196004f728ce83f726d480627 [2023-11-23 20:32:42,889 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:42,890 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:42,892 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:42,892 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:42,897 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:42,898 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:42" (1/1) ... [2023-11-23 20:32:42,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c1a9e6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:42, skipping insertion in model container [2023-11-23 20:32:42,900 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:42" (1/1) ... [2023-11-23 20:32:42,948 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:43,446 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:43,464 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-23 20:32:43,464 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cf04ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:43, skipping insertion in model container [2023-11-23 20:32:43,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:43,465 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 20:32:43,467 INFO L158 Benchmark]: Toolchain (without parser) took 575.84ms. Allocated memory is still 109.1MB. Free memory was 69.6MB in the beginning and 54.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 20:32:43,467 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 109.1MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:32:43,468 INFO L158 Benchmark]: CACSL2BoogieTranslator took 573.35ms. Allocated memory is still 109.1MB. Free memory was 69.3MB in the beginning and 54.9MB in the end (delta: 14.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 20:32:43,469 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 109.1MB. Free memory is still 55.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 573.35ms. Allocated memory is still 109.1MB. Free memory was 69.3MB in the beginning and 54.9MB in the end (delta: 14.4MB). 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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:32:45,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:32:46,029 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 20:32:46,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:32:46,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:32:46,105 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:32:46,106 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:32:46,107 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:32:46,108 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:32:46,113 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:32:46,113 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:32:46,114 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:32:46,114 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:32:46,116 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:32:46,117 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:32:46,117 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:32:46,118 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:32:46,118 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:32:46,119 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:32:46,120 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:32:46,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:32:46,121 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:32:46,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:32:46,121 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:32:46,122 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:32:46,122 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:32:46,123 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:32:46,123 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:32:46,123 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 20:32:46,124 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 20:32:46,125 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:32:46,126 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:32:46,126 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:32:46,126 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:32:46,127 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 20:32:46,127 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:32:46,128 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:32:46,129 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:46,129 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:32:46,129 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:32:46,129 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 20:32:46,130 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 20:32:46,130 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:32:46,130 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:32:46,131 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:32:46,131 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_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02acfb70bf31515ceb84abad2b1306b0eab86ac3ab86c4ec829443e87c9da071 [2023-11-23 20:32:46,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:32:46,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:32:46,530 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:32:46,531 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:32:46,531 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:32:46,533 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-11-23 20:32:49,685 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:32:50,093 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:32:50,093 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/sv-benchmarks/c/ldv-memsafety/memleaks_test11_1.i [2023-11-23 20:32:50,123 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data/d55990fe3/9af084f88e6943a2a5710a645141f585/FLAG447649e03 [2023-11-23 20:32:50,145 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/data/d55990fe3/9af084f88e6943a2a5710a645141f585 [2023-11-23 20:32:50,147 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:32:50,149 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:32:50,150 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:50,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:32:50,156 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:32:50,157 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:50" (1/1) ... [2023-11-23 20:32:50,158 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@704bef8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:50, skipping insertion in model container [2023-11-23 20:32:50,158 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:32:50" (1/1) ... [2023-11-23 20:32:50,219 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:50,800 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:50,828 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 20:32:50,840 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:32:50,967 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:50,974 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:32:51,039 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:32:51,081 WARN L675 CHandler]: The function release is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:32:51,089 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:32:51,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51 WrapperNode [2023-11-23 20:32:51,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:32:51,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:51,091 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:32:51,091 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:32:51,098 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,146 INFO L138 Inliner]: procedures = 169, calls = 88, calls flagged for inlining = 26, calls inlined = 8, statements flattened = 95 [2023-11-23 20:32:51,146 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:32:51,147 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:32:51,147 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:32:51,147 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:32:51,156 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,156 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,160 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,161 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,171 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,173 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,175 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,177 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,181 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:32:51,182 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:32:51,182 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:32:51,182 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:32:51,183 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (1/1) ... [2023-11-23 20:32:51,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:32:51,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:32:51,226 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:32:51,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:32:51,272 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-11-23 20:32:51,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-11-23 20:32:51,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_i2c_set_clientdata [2023-11-23 20:32:51,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_i2c_set_clientdata [2023-11-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:32:51,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:32:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:32:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:32:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:32:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-23 20:32:51,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:32:51,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:32:51,425 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:32:51,427 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:32:51,862 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:32:51,939 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:32:51,940 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:32:51,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:51 BoogieIcfgContainer [2023-11-23 20:32:51,941 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:32:51,944 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:32:51,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:32:51,948 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:32:51,949 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:32:50" (1/3) ... [2023-11-23 20:32:51,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d25815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:51, skipping insertion in model container [2023-11-23 20:32:51,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:32:51" (2/3) ... [2023-11-23 20:32:51,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76d25815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:32:51, skipping insertion in model container [2023-11-23 20:32:51,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:32:51" (3/3) ... [2023-11-23 20:32:51,957 INFO L112 eAbstractionObserver]: Analyzing ICFG memleaks_test11_1.i [2023-11-23 20:32:51,976 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:32:51,977 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2023-11-23 20:32:52,020 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:32:52,027 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;@7d524644, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:32:52,027 INFO L358 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2023-11-23 20:32:52,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 80 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:32:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:32:52,043 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:52,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:52,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:32:52,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1692559857, now seen corresponding path program 1 times [2023-11-23 20:32:52,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:32:52,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147500690] [2023-11-23 20:32:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:52,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:32:52,072 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:32:52,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 20:32:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:52,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:32:52,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:52,273 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:52,274 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:32:52,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147500690] [2023-11-23 20:32:52,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147500690] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:52,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:52,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:32:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759525233] [2023-11-23 20:32:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:52,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:52,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:32:52,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:52,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:52,314 INFO L87 Difference]: Start difference. First operand has 80 states, 41 states have (on average 1.8780487804878048) internal successors, (77), 71 states have internal predecessors, (77), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2023-11-23 20:32:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:52,492 INFO L93 Difference]: Finished difference Result 147 states and 172 transitions. [2023-11-23 20:32:52,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:52,495 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 [2023-11-23 20:32:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:52,506 INFO L225 Difference]: With dead ends: 147 [2023-11-23 20:32:52,506 INFO L226 Difference]: Without dead ends: 146 [2023-11-23 20:32:52,508 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 [2023-11-23 20:32:52,511 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 62 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:52,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 328 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:32:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-23 20:32:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 83. [2023-11-23 20:32:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 73 states have internal predecessors, (79), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-23 20:32:52,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-11-23 20:32:52,581 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 10 [2023-11-23 20:32:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:52,581 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-11-23 20:32:52,582 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) [2023-11-23 20:32:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-11-23 20:32:52,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:32:52,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:52,583 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:52,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-23 20:32:52,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:52,786 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:32:52,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash -805056176, now seen corresponding path program 1 times [2023-11-23 20:32:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:32:52,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059594346] [2023-11-23 20:32:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:52,788 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:52,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:32:52,789 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:32:52,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 20:32:52,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:52,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:32:52,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:52,896 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:52,896 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:32:52,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059594346] [2023-11-23 20:32:52,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059594346] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:52,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:52,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:32:52,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297168078] [2023-11-23 20:32:52,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:52,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:32:52,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:32:52,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:32:52,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:32:52,900 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:32:53,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:53,225 INFO L93 Difference]: Finished difference Result 148 states and 171 transitions. [2023-11-23 20:32:53,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:32:53,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-23 20:32:53,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:53,228 INFO L225 Difference]: With dead ends: 148 [2023-11-23 20:32:53,228 INFO L226 Difference]: Without dead ends: 146 [2023-11-23 20:32:53,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:32:53,230 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 62 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:53,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 266 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:32:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-23 20:32:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 79. [2023-11-23 20:32:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 1.829268292682927) internal successors, (75), 70 states have internal predecessors, (75), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-23 20:32:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-11-23 20:32:53,243 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 10 [2023-11-23 20:32:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:53,243 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-11-23 20:32:53,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 20:32:53,244 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-11-23 20:32:53,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:32:53,245 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:53,245 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:53,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:32:53,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:53,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:32:53,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:53,448 INFO L85 PathProgramCache]: Analyzing trace with hash -917501701, now seen corresponding path program 1 times [2023-11-23 20:32:53,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:32:53,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473293689] [2023-11-23 20:32:53,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:53,449 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:53,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:32:53,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:32:53,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-23 20:32:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:53,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:32:53,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:53,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:32:53,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:32:53,604 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:32:53,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473293689] [2023-11-23 20:32:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473293689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:32:53,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:32:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:32:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610031444] [2023-11-23 20:32:53,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:32:53,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:32:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:32:53,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:32:53,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:53,609 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:32:53,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:32:53,787 INFO L93 Difference]: Finished difference Result 143 states and 164 transitions. [2023-11-23 20:32:53,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:32:53,788 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2023-11-23 20:32:53,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:32:53,790 INFO L225 Difference]: With dead ends: 143 [2023-11-23 20:32:53,790 INFO L226 Difference]: Without dead ends: 143 [2023-11-23 20:32:53,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:32:53,792 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 59 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:32:53,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 405 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:32:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-23 20:32:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 83. [2023-11-23 20:32:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 73 states have internal predecessors, (78), 6 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (10), 7 states have call predecessors, (10), 6 states have call successors, (10) [2023-11-23 20:32:53,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2023-11-23 20:32:53,803 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2023-11-23 20:32:53,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:32:53,804 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2023-11-23 20:32:53,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-23 20:32:53,804 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2023-11-23 20:32:53,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:32:53,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:32:53,805 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:32:53,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-23 20:32:54,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:54,008 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:32:54,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:32:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash -917501717, now seen corresponding path program 1 times [2023-11-23 20:32:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:32:54,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1053274881] [2023-11-23 20:32:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:54,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:32:54,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:32:54,011 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:32:54,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-23 20:32:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:54,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:32:54,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:54,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:32:54,329 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 20:32:54,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 20:32:54,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:54,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:32:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:32:57,504 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:32:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1053274881] [2023-11-23 20:32:57,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1053274881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:32:57,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [567211142] [2023-11-23 20:32:57,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:32:57,506 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:32:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:32:57,508 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:32:57,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2023-11-23 20:32:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:32:57,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 20:32:57,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:32:57,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:32:57,719 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-11-23 20:32:57,752 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:32:57,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:32:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-23 20:32:57,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:00,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [567211142] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:00,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827474453] [2023-11-23 20:33:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:00,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:00,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:00,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:00,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:33:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:00,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:00,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:00,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:00,306 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 20:33:00,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 20:33:00,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:00,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:04,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827474453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:04,675 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:33:04,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 9 [2023-11-23 20:33:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568760544] [2023-11-23 20:33:04,675 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:04,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:33:04,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:04,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:33:04,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=52, Unknown=2, NotChecked=14, Total=90 [2023-11-23 20:33:04,678 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:33:05,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:05,153 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2023-11-23 20:33:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2023-11-23 20:33:05,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:05,155 INFO L225 Difference]: With dead ends: 121 [2023-11-23 20:33:05,155 INFO L226 Difference]: Without dead ends: 121 [2023-11-23 20:33:05,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=34, Invalid=78, Unknown=2, NotChecked=18, Total=132 [2023-11-23 20:33:05,157 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 64 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:05,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 200 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 225 Invalid, 0 Unknown, 130 Unchecked, 0.4s Time] [2023-11-23 20:33:05,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-23 20:33:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2023-11-23 20:33:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 81 states have internal predecessors, (92), 7 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (12), 10 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-23 20:33:05,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2023-11-23 20:33:05,167 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 16 [2023-11-23 20:33:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:05,168 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2023-11-23 20:33:05,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-23 20:33:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2023-11-23 20:33:05,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:33:05,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:05,169 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:05,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:05,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:05,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:05,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:05,785 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:05,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:05,786 INFO L85 PathProgramCache]: Analyzing trace with hash -917501716, now seen corresponding path program 1 times [2023-11-23 20:33:05,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:05,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [322365772] [2023-11-23 20:33:05,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:05,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:05,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:05,788 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:05,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-23 20:33:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:05,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:33:05,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:05,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:05,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:06,056 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-23 20:33:06,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:06,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:06,102 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:06,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-23 20:33:06,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:08,468 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [322365772] [2023-11-23 20:33:08,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [322365772] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:08,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233909104] [2023-11-23 20:33:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:08,469 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:08,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:08,477 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:08,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2023-11-23 20:33:08,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:08,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:33:08,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:08,643 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:08,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:08,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:08,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:08,818 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:08,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-23 20:33:08,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:09,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1233909104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:09,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681709258] [2023-11-23 20:33:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:09,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:09,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:09,081 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:09,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:33:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:09,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:33:09,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:09,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:09,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:09,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:09,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:09,357 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:09,357 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:09,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-23 20:33:09,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:09,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681709258] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:09,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:09,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-11-23 20:33:09,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112100259] [2023-11-23 20:33:09,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:09,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:33:09,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:09,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:33:09,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=69, Unknown=2, NotChecked=16, Total=110 [2023-11-23 20:33:09,607 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:10,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:10,893 INFO L93 Difference]: Finished difference Result 203 states and 233 transitions. [2023-11-23 20:33:10,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:33:10,894 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-23 20:33:10,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:10,896 INFO L225 Difference]: With dead ends: 203 [2023-11-23 20:33:10,896 INFO L226 Difference]: Without dead ends: 203 [2023-11-23 20:33:10,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=31, Invalid=103, Unknown=2, NotChecked=20, Total=156 [2023-11-23 20:33:10,897 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 118 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:10,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 524 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 531 Invalid, 0 Unknown, 229 Unchecked, 1.1s Time] [2023-11-23 20:33:10,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-23 20:33:10,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 130. [2023-11-23 20:33:10,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 85 states have (on average 1.8) internal successors, (153), 112 states have internal predecessors, (153), 12 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (20), 15 states have call predecessors, (20), 12 states have call successors, (20) [2023-11-23 20:33:10,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 185 transitions. [2023-11-23 20:33:10,911 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 185 transitions. Word has length 16 [2023-11-23 20:33:10,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:10,911 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 185 transitions. [2023-11-23 20:33:10,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:10,912 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 185 transitions. [2023-11-23 20:33:10,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:33:10,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:10,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:10,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (9)] Ended with exit code 0 [2023-11-23 20:33:11,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:11,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:11,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:11,515 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:11,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:11,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1210904724, now seen corresponding path program 1 times [2023-11-23 20:33:11,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:11,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [255733984] [2023-11-23 20:33:11,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:11,517 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:11,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:11,518 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:11,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-23 20:33:11,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:11,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:11,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:11,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:11,623 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:11,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [255733984] [2023-11-23 20:33:11,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [255733984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:11,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:11,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:11,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754538433] [2023-11-23 20:33:11,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:11,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:11,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:11,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:11,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:11,626 INFO L87 Difference]: Start difference. First operand 130 states and 185 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:11,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:11,730 INFO L93 Difference]: Finished difference Result 115 states and 155 transitions. [2023-11-23 20:33:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:11,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-11-23 20:33:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:11,732 INFO L225 Difference]: With dead ends: 115 [2023-11-23 20:33:11,732 INFO L226 Difference]: Without dead ends: 113 [2023-11-23 20:33:11,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:11,733 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 0 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:11,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 319 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:11,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-23 20:33:11,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-23 20:33:11,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.7945205479452055) internal successors, (131), 99 states have internal predecessors, (131), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-23 20:33:11,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 153 transitions. [2023-11-23 20:33:11,743 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 153 transitions. Word has length 16 [2023-11-23 20:33:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:11,743 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 153 transitions. [2023-11-23 20:33:11,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 20:33:11,744 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 153 transitions. [2023-11-23 20:33:11,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:33:11,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:11,745 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:11,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:11,947 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:11,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1785245139, now seen corresponding path program 1 times [2023-11-23 20:33:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1604965886] [2023-11-23 20:33:11,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:11,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:11,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:11,950 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:11,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-23 20:33:12,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:12,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:33:12,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:12,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:12,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:12,297 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:12,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1604965886] [2023-11-23 20:33:12,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1604965886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:12,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1720792053] [2023-11-23 20:33:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:12,297 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:12,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:12,298 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:12,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-11-23 20:33:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:12,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:33:12,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:12,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:12,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:12,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1720792053] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:12,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545143093] [2023-11-23 20:33:12,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:12,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:12,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:12,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:12,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 20:33:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:12,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:33:12,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:12,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:12,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:12,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545143093] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:12,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:33:12,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 5, 4] total 9 [2023-11-23 20:33:12,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653765856] [2023-11-23 20:33:12,647 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:12,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:33:12,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:12,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:33:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:33:12,649 INFO L87 Difference]: Start difference. First operand 113 states and 153 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 20:33:13,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:13,031 INFO L93 Difference]: Finished difference Result 116 states and 155 transitions. [2023-11-23 20:33:13,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:13,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 17 [2023-11-23 20:33:13,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:13,033 INFO L225 Difference]: With dead ends: 116 [2023-11-23 20:33:13,033 INFO L226 Difference]: Without dead ends: 114 [2023-11-23 20:33:13,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:33:13,034 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 62 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:13,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 229 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:33:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-11-23 20:33:13,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2023-11-23 20:33:13,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.7466666666666666) internal successors, (131), 99 states have internal predecessors, (131), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 11 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-23 20:33:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2023-11-23 20:33:13,055 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 17 [2023-11-23 20:33:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:13,055 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2023-11-23 20:33:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-23 20:33:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2023-11-23 20:33:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:33:13,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:13,057 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:13,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:13,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:13,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:13,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:13,659 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:13,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:13,659 INFO L85 PathProgramCache]: Analyzing trace with hash 342226559, now seen corresponding path program 1 times [2023-11-23 20:33:13,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:13,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203470503] [2023-11-23 20:33:13,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:13,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:13,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:13,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:13,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-23 20:33:13,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:13,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:33:13,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:13,904 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ULTIMATE.start_entry_point_~c11~0#1.base| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base|) (_ bv0 1)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base| (_ bv0 1))))) is different from true [2023-11-23 20:33:13,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:13,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:14,006 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-11-23 20:33:14,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-11-23 20:33:14,193 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:14,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203470503] [2023-11-23 20:33:14,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203470503] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:14,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [121719118] [2023-11-23 20:33:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:14,193 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:14,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:14,195 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:14,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-11-23 20:33:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:14,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 20:33:14,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:14,548 WARN L876 $PredicateComparison]: unable to prove that (and (= (_ bv0 1) (select |c_ULTIMATE.start_main_old_#valid#1| (_ bv0 32))) (exists ((|ULTIMATE.start_entry_point_~c11~0#1.base| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base|) (_ bv0 1)) (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_entry_point_~c11~0#1.base| (_ bv0 1)))))) is different from true [2023-11-23 20:33:14,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:14,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:14,648 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-11-23 20:33:14,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-11-23 20:33:14,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [121719118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:14,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929522239] [2023-11-23 20:33:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:14,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:14,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:14,853 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:14,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 20:33:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:14,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:33:14,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:15,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:15,137 INFO L349 Elim1Store]: treesize reduction 30, result has 21.1 percent of original size [2023-11-23 20:33:15,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 38 [2023-11-23 20:33:15,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929522239] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:15,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-11-23 20:33:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150190877] [2023-11-23 20:33:15,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-23 20:33:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-23 20:33:15,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=88, Unknown=2, NotChecked=38, Total=156 [2023-11-23 20:33:15,291 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:33:16,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:16,153 INFO L93 Difference]: Finished difference Result 168 states and 215 transitions. [2023-11-23 20:33:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:33:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-11-23 20:33:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:16,157 INFO L225 Difference]: With dead ends: 168 [2023-11-23 20:33:16,157 INFO L226 Difference]: Without dead ends: 163 [2023-11-23 20:33:16,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 83 SyntacticMatches, 9 SemanticMatches, 12 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=35, Invalid=103, Unknown=2, NotChecked=42, Total=182 [2023-11-23 20:33:16,158 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 54 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 306 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:16,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 453 Invalid, 703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 387 Invalid, 0 Unknown, 306 Unchecked, 0.8s Time] [2023-11-23 20:33:16,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-23 20:33:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 109. [2023-11-23 20:33:16,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 70 states have (on average 1.7857142857142858) internal successors, (125), 95 states have internal predecessors, (125), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (13), 10 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-23 20:33:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 147 transitions. [2023-11-23 20:33:16,174 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 147 transitions. Word has length 20 [2023-11-23 20:33:16,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:16,175 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 147 transitions. [2023-11-23 20:33:16,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 20:33:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 147 transitions. [2023-11-23 20:33:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:33:16,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:16,180 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:16,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:16,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:16,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:16,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:16,783 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:16,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:16,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1237891212, now seen corresponding path program 1 times [2023-11-23 20:33:16,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:16,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [455745544] [2023-11-23 20:33:16,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:16,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:16,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:16,785 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:16,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-23 20:33:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:16,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:16,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:16,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:16,941 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-11-23 20:33:16,966 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:33:16,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:33:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-11-23 20:33:16,989 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:17,158 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [455745544] [2023-11-23 20:33:17,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [455745544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:17,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [159593148] [2023-11-23 20:33:17,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:17,159 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:17,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:17,161 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:17,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-11-23 20:33:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:17,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 20:33:17,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:17,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:17,379 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:33:17,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:33:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-11-23 20:33:17,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:17,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [159593148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:17,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547072179] [2023-11-23 20:33:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:17,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:17,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:17,578 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:17,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-23 20:33:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:17,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:17,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:17,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:17,771 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 20:33:17,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 20:33:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:17,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:18,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547072179] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:18,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:33:18,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 8 [2023-11-23 20:33:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758496886] [2023-11-23 20:33:18,006 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:18,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-23 20:33:18,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-23 20:33:18,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=42, Unknown=1, NotChecked=12, Total=72 [2023-11-23 20:33:18,007 INFO L87 Difference]: Start difference. First operand 109 states and 147 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:33:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:18,533 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2023-11-23 20:33:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:33:18,534 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2023-11-23 20:33:18,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:18,535 INFO L225 Difference]: With dead ends: 153 [2023-11-23 20:33:18,536 INFO L226 Difference]: Without dead ends: 153 [2023-11-23 20:33:18,536 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2023-11-23 20:33:18,537 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 52 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:18,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 227 Invalid, 0 Unknown, 120 Unchecked, 0.5s Time] [2023-11-23 20:33:18,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-23 20:33:18,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 122. [2023-11-23 20:33:18,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 82 states have (on average 1.7439024390243902) internal successors, (143), 105 states have internal predecessors, (143), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (15), 13 states have call predecessors, (15), 10 states have call successors, (15) [2023-11-23 20:33:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2023-11-23 20:33:18,552 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 24 [2023-11-23 20:33:18,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:18,554 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2023-11-23 20:33:18,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 20:33:18,555 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2023-11-23 20:33:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:33:18,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:18,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:18,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:18,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:18,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:19,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:19,163 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:19,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:19,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1237891213, now seen corresponding path program 1 times [2023-11-23 20:33:19,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:19,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286009159] [2023-11-23 20:33:19,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:19,164 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:19,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:19,166 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:19,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-23 20:33:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:19,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 20:33:19,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:19,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:19,413 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#length)| |ldv_malloc_#res.base| |c_ldv_malloc_#in~size|) |c_#length|)) is different from true [2023-11-23 20:33:19,440 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-23 20:33:19,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-23 20:33:19,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-23 20:33:19,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:19,756 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:19,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286009159] [2023-11-23 20:33:19,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286009159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:19,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [288188527] [2023-11-23 20:33:19,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:19,757 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:19,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:19,758 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:19,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-11-23 20:33:19,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:19,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:33:19,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:19,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:19,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:20,154 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-23 20:33:20,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:20,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:20,197 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:20,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-23 20:33:20,210 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:20,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [288188527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:20,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957128464] [2023-11-23 20:33:20,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:20,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:20,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:20,473 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:20,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 20:33:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:20,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 20:33:20,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:20,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:20,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:20,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:20,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:20,759 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:20,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-23 20:33:20,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:20,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957128464] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:20,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:20,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-11-23 20:33:20,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120885538] [2023-11-23 20:33:20,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:20,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 20:33:20,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:20,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 20:33:20,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=173, Unknown=2, NotChecked=54, Total=272 [2023-11-23 20:33:20,984 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 20:33:22,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:22,378 INFO L93 Difference]: Finished difference Result 234 states and 312 transitions. [2023-11-23 20:33:22,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-23 20:33:22,379 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 24 [2023-11-23 20:33:22,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:22,381 INFO L225 Difference]: With dead ends: 234 [2023-11-23 20:33:22,381 INFO L226 Difference]: Without dead ends: 234 [2023-11-23 20:33:22,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=54, Invalid=224, Unknown=2, NotChecked=62, Total=342 [2023-11-23 20:33:22,382 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 127 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:22,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 705 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 591 Invalid, 0 Unknown, 390 Unchecked, 1.3s Time] [2023-11-23 20:33:22,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-11-23 20:33:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 168. [2023-11-23 20:33:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 122 states have (on average 1.7868852459016393) internal successors, (218), 145 states have internal predecessors, (218), 16 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (23), 19 states have call predecessors, (23), 16 states have call successors, (23) [2023-11-23 20:33:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 257 transitions. [2023-11-23 20:33:22,393 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 257 transitions. Word has length 24 [2023-11-23 20:33:22,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:22,393 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 257 transitions. [2023-11-23 20:33:22,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-23 20:33:22,394 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 257 transitions. [2023-11-23 20:33:22,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:33:22,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:22,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:22,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:22,599 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:22,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-23 20:33:22,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:22,998 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:22,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:22,998 INFO L85 PathProgramCache]: Analyzing trace with hash 732332587, now seen corresponding path program 1 times [2023-11-23 20:33:22,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:22,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541544103] [2023-11-23 20:33:22,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:22,999 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:22,999 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:23,000 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:23,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-23 20:33:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:23,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:23,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:23,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:23,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:23,141 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:23,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541544103] [2023-11-23 20:33:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541544103] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:23,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114459392] [2023-11-23 20:33:23,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:23,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:23,143 INFO L87 Difference]: Start difference. First operand 168 states and 257 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:33:23,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:23,233 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2023-11-23 20:33:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:23,234 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-11-23 20:33:23,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:23,235 INFO L225 Difference]: With dead ends: 111 [2023-11-23 20:33:23,235 INFO L226 Difference]: Without dead ends: 109 [2023-11-23 20:33:23,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:23,236 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 0 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:23,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 292 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-23 20:33:23,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-23 20:33:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 95 states have internal predecessors, (123), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-23 20:33:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 144 transitions. [2023-11-23 20:33:23,242 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 144 transitions. Word has length 24 [2023-11-23 20:33:23,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:23,242 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 144 transitions. [2023-11-23 20:33:23,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:33:23,242 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 144 transitions. [2023-11-23 20:33:23,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:33:23,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:23,243 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:23,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:23,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:23,446 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:23,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:23,446 INFO L85 PathProgramCache]: Analyzing trace with hash -280074892, now seen corresponding path program 1 times [2023-11-23 20:33:23,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:23,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300388570] [2023-11-23 20:33:23,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:23,447 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:23,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:23,449 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:23,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-23 20:33:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:23,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 20:33:23,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:23,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:33:23,579 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (= (store |c_old(#valid)| |ldv_malloc_#res.base| (_ bv1 1)) |c_#valid|)) is different from true [2023-11-23 20:33:23,598 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:33:23,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:33:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:23,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:23,633 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:23,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300388570] [2023-11-23 20:33:23,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300388570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:23,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:23,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:23,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509711610] [2023-11-23 20:33:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:23,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:23,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:23,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:23,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=14, Unknown=1, NotChecked=6, Total=30 [2023-11-23 20:33:23,635 INFO L87 Difference]: Start difference. First operand 109 states and 144 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:33:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:23,910 INFO L93 Difference]: Finished difference Result 141 states and 178 transitions. [2023-11-23 20:33:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:33:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2023-11-23 20:33:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:23,912 INFO L225 Difference]: With dead ends: 141 [2023-11-23 20:33:23,912 INFO L226 Difference]: Without dead ends: 141 [2023-11-23 20:33:23,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=20, Unknown=1, NotChecked=8, Total=42 [2023-11-23 20:33:23,913 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 62 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:23,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 235 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2023-11-23 20:33:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-23 20:33:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 108. [2023-11-23 20:33:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.6575342465753424) internal successors, (121), 94 states have internal predecessors, (121), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (12), 10 states have call predecessors, (12), 9 states have call successors, (12) [2023-11-23 20:33:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 142 transitions. [2023-11-23 20:33:23,919 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 142 transitions. Word has length 25 [2023-11-23 20:33:23,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:23,920 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 142 transitions. [2023-11-23 20:33:23,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 20:33:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 142 transitions. [2023-11-23 20:33:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:33:23,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:23,921 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:23,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:24,124 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash -280074891, now seen corresponding path program 1 times [2023-11-23 20:33:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:24,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [976617661] [2023-11-23 20:33:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:24,125 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:24,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:24,126 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:24,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-23 20:33:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:24,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 20:33:24,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:24,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:24,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:24,398 WARN L876 $PredicateComparison]: unable to prove that (exists ((|ldv_malloc_#res.base| (_ BitVec 32))) (and (= (_ bv0 1) (select |c_old(#valid)| |ldv_malloc_#res.base|)) (= (store |c_old(#length)| |ldv_malloc_#res.base| (select |c_#length| |ldv_malloc_#res.base|)) |c_#length|))) is different from true [2023-11-23 20:33:24,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:24,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:24,438 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:24,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:24,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:24,542 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:24,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2023-11-23 20:33:24,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:26,975 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:26,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [976617661] [2023-11-23 20:33:26,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [976617661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:26,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505263148] [2023-11-23 20:33:26,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:26,976 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:26,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:26,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:26,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-11-23 20:33:27,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:27,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-23 20:33:27,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:27,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:27,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-23 20:33:27,381 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:27,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:27,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:27,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:27,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:27,542 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:27,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 4 not checked. [2023-11-23 20:33:27,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:29,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505263148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:29,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982947965] [2023-11-23 20:33:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:29,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:29,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:29,816 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:29,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-23 20:33:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:29,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 20:33:29,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:30,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:30,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:33:30,232 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:30,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 2 not checked. [2023-11-23 20:33:30,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:32,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982947965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:32,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:33:32,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2023-11-23 20:33:32,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005800205] [2023-11-23 20:33:32,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:32,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 20:33:32,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:32,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 20:33:32,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=319, Unknown=2, NotChecked=36, Total=420 [2023-11-23 20:33:32,614 INFO L87 Difference]: Start difference. First operand 108 states and 142 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:33:34,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:34,228 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2023-11-23 20:33:34,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-23 20:33:34,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 25 [2023-11-23 20:33:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:34,230 INFO L225 Difference]: With dead ends: 178 [2023-11-23 20:33:34,230 INFO L226 Difference]: Without dead ends: 178 [2023-11-23 20:33:34,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=121, Invalid=583, Unknown=2, NotChecked=50, Total=756 [2023-11-23 20:33:34,232 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 285 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:34,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 680 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 588 Invalid, 0 Unknown, 193 Unchecked, 1.2s Time] [2023-11-23 20:33:34,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-23 20:33:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 77. [2023-11-23 20:33:34,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.5319148936170213) internal successors, (72), 67 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 20:33:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-23 20:33:34,235 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 25 [2023-11-23 20:33:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:34,236 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-23 20:33:34,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-23 20:33:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-23 20:33:34,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:33:34,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:34,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:34,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:34,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:34,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:34,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:34,849 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:34,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash -280077995, now seen corresponding path program 1 times [2023-11-23 20:33:34,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:34,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532708230] [2023-11-23 20:33:34,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:34,850 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:34,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:34,851 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:34,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-23 20:33:34,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:34,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:33:34,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:34,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:33:34,955 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:34,955 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:34,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532708230] [2023-11-23 20:33:34,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532708230] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:34,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:34,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:34,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215268905] [2023-11-23 20:33:34,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:34,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:33:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:34,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:33:34,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:34,957 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:33:35,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:35,069 INFO L93 Difference]: Finished difference Result 126 states and 142 transitions. [2023-11-23 20:33:35,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:35,069 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2023-11-23 20:33:35,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:35,070 INFO L225 Difference]: With dead ends: 126 [2023-11-23 20:33:35,070 INFO L226 Difference]: Without dead ends: 126 [2023-11-23 20:33:35,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:35,071 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 46 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:35,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 394 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:33:35,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-23 20:33:35,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 79. [2023-11-23 20:33:35,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.510204081632653) internal successors, (74), 68 states have internal predecessors, (74), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 20:33:35,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2023-11-23 20:33:35,077 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 25 [2023-11-23 20:33:35,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:35,077 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2023-11-23 20:33:35,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 20:33:35,078 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2023-11-23 20:33:35,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:33:35,078 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:35,078 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:35,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Ended with exit code 0 [2023-11-23 20:33:35,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:35,281 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:35,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:35,281 INFO L85 PathProgramCache]: Analyzing trace with hash 607425686, now seen corresponding path program 1 times [2023-11-23 20:33:35,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:35,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135695574] [2023-11-23 20:33:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:35,282 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:35,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:35,283 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:35,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-23 20:33:35,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:35,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:35,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-23 20:33:35,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:33:35,925 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135695574] [2023-11-23 20:33:35,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135695574] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:35,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [839292641] [2023-11-23 20:33:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:35,925 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:35,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:35,926 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:35,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-11-23 20:33:36,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:36,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 20:33:36,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:36,089 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:33:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [839292641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547219157] [2023-11-23 20:33:36,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:36,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:36,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:36,140 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:36,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-23 20:33:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:36,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:33:36,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:36,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:33:36,422 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:33:36,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547219157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:36,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:33:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 5, 4, 7, 6] total 15 [2023-11-23 20:33:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000956201] [2023-11-23 20:33:36,635 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:33:36,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:33:36,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:33:36,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:33:36,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:33:36,637 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-23 20:33:37,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:37,388 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-11-23 20:33:37,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 20:33:37,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) Word has length 25 [2023-11-23 20:33:37,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:37,390 INFO L225 Difference]: With dead ends: 78 [2023-11-23 20:33:37,390 INFO L226 Difference]: Without dead ends: 78 [2023-11-23 20:33:37,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 127 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:33:37,391 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 102 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:37,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 240 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:33:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-23 20:33:37,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-23 20:33:37,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.469387755102041) internal successors, (72), 67 states have internal predecessors, (72), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 20:33:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-23 20:33:37,400 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 25 [2023-11-23 20:33:37,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:37,401 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-23 20:33:37,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 13 states have internal predecessors, (49), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2023-11-23 20:33:37,401 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-23 20:33:37,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 20:33:37,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:37,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:37,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:37,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:37,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-23 20:33:38,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:38,005 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2023-11-23 20:33:38,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash -92383887, now seen corresponding path program 1 times [2023-11-23 20:33:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:33:38,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [213716638] [2023-11-23 20:33:38,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:33:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:33:38,007 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:33:38,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-11-23 20:33:38,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:38,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-23 20:33:38,120 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:38,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-23 20:33:38,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:38,445 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-23 20:33:38,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2023-11-23 20:33:38,524 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:33:38,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 46 [2023-11-23 20:33:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-23 20:33:38,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:38,841 INFO L349 Elim1Store]: treesize reduction 7, result has 68.2 percent of original size [2023-11-23 20:33:38,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2023-11-23 20:33:38,961 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:33:38,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [213716638] [2023-11-23 20:33:38,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [213716638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:33:38,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1110258965] [2023-11-23 20:33:38,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:38,961 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:33:38,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:33:38,962 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:33:38,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df4082d6-8143-495e-bec0-a7e0656be458/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2023-11-23 20:33:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:39,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-23 20:33:39,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:39,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:33:39,416 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:33:39,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:33:39,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7