./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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_f3137bcb-af26-412e-9f93-8f4826168a63/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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:15,664 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:15,742 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 21:28:15,748 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:15,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:15,773 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:15,773 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:15,774 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:15,775 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:15,775 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:15,776 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:15,777 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:15,777 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:15,778 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:15,778 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:15,779 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:15,779 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:15,780 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:15,780 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:15,781 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:15,781 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:15,782 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:15,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:28:15,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:28:15,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:15,784 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:28:15,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:15,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:28:15,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:15,785 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:28:15,786 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:28:15,786 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:28:15,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:15,787 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:28:15,787 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:28:15,787 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:28:15,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:15,788 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:15,788 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:15,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:15,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:15,789 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:15,789 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:15,789 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:15,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:15,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:15,790 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:15,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:15,790 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_f3137bcb-af26-412e-9f93-8f4826168a63/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2023-11-23 21:28:16,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:16,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:16,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:16,096 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:16,097 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:16,098 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-23 21:28:19,241 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:19,469 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:19,470 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-23 21:28:19,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data/c30da97ed/e31f9ee6898e40d492d71074fc6ae93a/FLAG9ec736803 [2023-11-23 21:28:19,493 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data/c30da97ed/e31f9ee6898e40d492d71074fc6ae93a [2023-11-23 21:28:19,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:19,497 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:19,499 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:19,499 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:19,505 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:19,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:19" (1/1) ... [2023-11-23 21:28:19,507 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43045098 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:19, skipping insertion in model container [2023-11-23 21:28:19,507 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:19" (1/1) ... [2023-11-23 21:28:19,533 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:19,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:19,760 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-23 21:28:19,761 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@63c8b75e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:19, skipping insertion in model container [2023-11-23 21:28:19,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:19,762 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 21:28:19,764 INFO L158 Benchmark]: Toolchain (without parser) took 265.88ms. Allocated memory is still 153.1MB. Free memory was 107.4MB in the beginning and 97.3MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:28:19,765 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 153.1MB. Free memory was 123.5MB in the beginning and 123.3MB in the end (delta: 194.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:28:19,766 INFO L158 Benchmark]: CACSL2BoogieTranslator took 263.19ms. Allocated memory is still 153.1MB. Free memory was 106.8MB in the beginning and 97.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-23 21:28:19,768 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 153.1MB. Free memory was 123.5MB in the beginning and 123.3MB in the end (delta: 194.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 263.19ms. Allocated memory is still 153.1MB. Free memory was 106.8MB in the beginning and 97.3MB in the end (delta: 9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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_f3137bcb-af26-412e-9f93-8f4826168a63/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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:22,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:22,470 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 21:28:22,478 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:22,479 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:22,510 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:22,511 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:22,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:22,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:22,518 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:22,518 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:22,519 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:22,519 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:22,521 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:22,521 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:22,522 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:22,522 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:28:22,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:28:22,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:22,525 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:28:22,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:22,526 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:28:22,526 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:22,527 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:28:22,527 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:28:22,527 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:28:22,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:22,528 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:28:22,529 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 21:28:22,529 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 21:28:22,531 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:28:22,531 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:28:22,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:22,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:22,532 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 21:28:22,532 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:22,533 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:22,533 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:22,533 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:22,534 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:22,534 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 21:28:22,534 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 21:28:22,535 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:22,535 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:22,535 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:22,536 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_f3137bcb-af26-412e-9f93-8f4826168a63/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2023-11-23 21:28:22,946 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:22,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:22,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:22,980 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:22,980 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:22,983 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-23 21:28:26,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:26,529 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:26,530 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2023-11-23 21:28:26,539 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data/3965dbf38/f8b49cc741314803bdcd9cb9623767ae/FLAGbb1072343 [2023-11-23 21:28:26,553 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/data/3965dbf38/f8b49cc741314803bdcd9cb9623767ae [2023-11-23 21:28:26,556 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:26,567 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:26,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:26,570 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:26,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:26,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:26" (1/1) ... [2023-11-23 21:28:26,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56a3cd82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:26, skipping insertion in model container [2023-11-23 21:28:26,580 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:26" (1/1) ... [2023-11-23 21:28:26,612 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:26,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:26,898 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 21:28:26,912 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:26,945 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:26,980 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:27,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:27,041 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:28:27,041 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 21:28:27,049 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:27,049 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27 WrapperNode [2023-11-23 21:28:27,049 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:27,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:27,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:27,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:27,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,084 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,129 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 196 [2023-11-23 21:28:27,129 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:27,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:27,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:27,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:27,140 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,141 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,164 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,175 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,199 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:27,219 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:27,219 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:27,220 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:27,220 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (1/1) ... [2023-11-23 21:28:27,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:27,260 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:27,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:28:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:28:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 21:28:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 21:28:27,307 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 21:28:27,308 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 21:28:27,308 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 21:28:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 21:28:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 21:28:27,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 21:28:27,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:27,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:27,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:28:27,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 21:28:27,314 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-23 21:28:27,441 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:27,444 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:28,147 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:28,557 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:28,558 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-23 21:28:28,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:28 BoogieIcfgContainer [2023-11-23 21:28:28,560 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:28,563 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:28,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:28,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:28,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:26" (1/3) ... [2023-11-23 21:28:28,568 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:28, skipping insertion in model container [2023-11-23 21:28:28,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:27" (2/3) ... [2023-11-23 21:28:28,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6368986 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:28, skipping insertion in model container [2023-11-23 21:28:28,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:28" (3/3) ... [2023-11-23 21:28:28,571 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2023-11-23 21:28:28,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:28:28,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-11-23 21:28:28,592 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 21:28:28,694 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-23 21:28:28,734 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 146 flow [2023-11-23 21:28:28,849 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 866 states, 752 states have (on average 3.110372340425532) internal successors, (2339), 865 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:28,867 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:28:28,874 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;@7403447d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:28:28,874 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-11-23 21:28:28,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 866 states, 752 states have (on average 3.110372340425532) internal successors, (2339), 865 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:28:28,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:28,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:28:28,888 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:28,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash 590919, now seen corresponding path program 1 times [2023-11-23 21:28:28,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:28,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1324525268] [2023-11-23 21:28:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:28,907 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:28,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:28,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:28,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 21:28:29,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:29,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:28:29,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:29,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:28:29,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:29,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:28:29,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:29,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:28:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:29,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:28:29,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:29,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:28:29,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:29,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:28:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:29,266 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:29,267 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1324525268] [2023-11-23 21:28:29,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1324525268] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:29,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:29,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:28:29,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339331582] [2023-11-23 21:28:29,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:29,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:29,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:29,320 INFO L87 Difference]: Start difference. First operand has 866 states, 752 states have (on average 3.110372340425532) internal successors, (2339), 865 states have internal predecessors, (2339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:29,603 INFO L93 Difference]: Finished difference Result 862 states and 2335 transitions. [2023-11-23 21:28:29,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:28:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:29,654 INFO L225 Difference]: With dead ends: 862 [2023-11-23 21:28:29,654 INFO L226 Difference]: Without dead ends: 862 [2023-11-23 21:28:29,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:29,663 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 5 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:29,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:29,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2023-11-23 21:28:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 862. [2023-11-23 21:28:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 751 states have (on average 3.1091877496671105) internal successors, (2335), 861 states have internal predecessors, (2335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2335 transitions. [2023-11-23 21:28:29,783 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2335 transitions. Word has length 3 [2023-11-23 21:28:29,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:29,783 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 2335 transitions. [2023-11-23 21:28:29,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:29,784 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2335 transitions. [2023-11-23 21:28:29,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:28:29,784 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:29,785 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:28:29,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:29,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:29,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:29,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:29,989 INFO L85 PathProgramCache]: Analyzing trace with hash 590920, now seen corresponding path program 1 times [2023-11-23 21:28:29,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:29,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1290308140] [2023-11-23 21:28:29,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:29,990 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:29,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:29,992 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:29,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 21:28:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:30,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:28:30,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:30,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-23 21:28:30,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:30,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:30,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:30,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:30,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:30,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:30,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:30,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:28:30,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:30,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:30,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:30,354 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:30,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1290308140] [2023-11-23 21:28:30,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1290308140] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:30,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:30,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:30,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170977518] [2023-11-23 21:28:30,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:30,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:30,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:30,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:30,364 INFO L87 Difference]: Start difference. First operand 862 states and 2335 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:30,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:30,888 INFO L93 Difference]: Finished difference Result 866 states and 2341 transitions. [2023-11-23 21:28:30,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:28:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:30,902 INFO L225 Difference]: With dead ends: 866 [2023-11-23 21:28:30,903 INFO L226 Difference]: Without dead ends: 866 [2023-11-23 21:28:30,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:30,913 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:30,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 59 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:28:30,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2023-11-23 21:28:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2023-11-23 21:28:30,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 755 states have (on average 3.100662251655629) internal successors, (2341), 865 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2341 transitions. [2023-11-23 21:28:31,004 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2341 transitions. Word has length 3 [2023-11-23 21:28:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:31,005 INFO L495 AbstractCegarLoop]: Abstraction has 866 states and 2341 transitions. [2023-11-23 21:28:31,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:31,005 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2341 transitions. [2023-11-23 21:28:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:28:31,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:31,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:28:31,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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)] Ended with exit code 0 [2023-11-23 21:28:31,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:31,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:31,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:31,209 INFO L85 PathProgramCache]: Analyzing trace with hash 18319253, now seen corresponding path program 1 times [2023-11-23 21:28:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [958525562] [2023-11-23 21:28:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:31,210 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:31,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:31,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:31,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-23 21:28:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:31,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:28:31,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:31,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 21:28:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:31,306 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:31,306 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [958525562] [2023-11-23 21:28:31,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [958525562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:31,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:31,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:31,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865189189] [2023-11-23 21:28:31,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:31,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:31,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:31,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:31,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:31,309 INFO L87 Difference]: Start difference. First operand 866 states and 2341 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:31,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:31,608 INFO L93 Difference]: Finished difference Result 715 states and 1932 transitions. [2023-11-23 21:28:31,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:31,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:28:31,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:31,616 INFO L225 Difference]: With dead ends: 715 [2023-11-23 21:28:31,616 INFO L226 Difference]: Without dead ends: 715 [2023-11-23 21:28:31,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:28:31,627 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:31,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 24 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:28:31,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2023-11-23 21:28:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 715. [2023-11-23 21:28:31,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 638 states have (on average 3.0282131661442007) internal successors, (1932), 714 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1932 transitions. [2023-11-23 21:28:31,662 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1932 transitions. Word has length 4 [2023-11-23 21:28:31,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:31,662 INFO L495 AbstractCegarLoop]: Abstraction has 715 states and 1932 transitions. [2023-11-23 21:28:31,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:31,663 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1932 transitions. [2023-11-23 21:28:31,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 21:28:31,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:31,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 21:28:31,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 21:28:31,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:31,866 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:31,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:31,866 INFO L85 PathProgramCache]: Analyzing trace with hash 18319254, now seen corresponding path program 1 times [2023-11-23 21:28:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:31,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2112392723] [2023-11-23 21:28:31,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:31,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:31,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:31,875 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:31,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 21:28:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:31,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:28:31,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:31,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:28:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:32,042 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:32,043 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:32,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2112392723] [2023-11-23 21:28:32,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2112392723] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:32,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:32,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:32,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068200955] [2023-11-23 21:28:32,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:32,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:32,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:32,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:32,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:32,046 INFO L87 Difference]: Start difference. First operand 715 states and 1932 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:32,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:32,443 INFO L93 Difference]: Finished difference Result 714 states and 1931 transitions. [2023-11-23 21:28:32,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:32,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 21:28:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:32,451 INFO L225 Difference]: With dead ends: 714 [2023-11-23 21:28:32,451 INFO L226 Difference]: Without dead ends: 714 [2023-11-23 21:28:32,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 21:28:32,452 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:32,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 22 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:28:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2023-11-23 21:28:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 714. [2023-11-23 21:28:32,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 638 states have (on average 3.0266457680250785) internal successors, (1931), 713 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1931 transitions. [2023-11-23 21:28:32,483 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 1931 transitions. Word has length 4 [2023-11-23 21:28:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:32,483 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 1931 transitions. [2023-11-23 21:28:32,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:32,484 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 1931 transitions. [2023-11-23 21:28:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:28:32,484 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:32,485 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-23 21:28:32,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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)] Ended with exit code 0 [2023-11-23 21:28:32,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:32,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:32,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:32,688 INFO L85 PathProgramCache]: Analyzing trace with hash 567893245, now seen corresponding path program 1 times [2023-11-23 21:28:32,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:32,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635727025] [2023-11-23 21:28:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:32,688 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:32,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:32,690 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:32,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-23 21:28:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:32,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:28:32,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:32,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-23 21:28:32,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:32,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:32,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:32,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:32,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:32,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:32,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:32,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:33,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:33,482 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:33,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635727025] [2023-11-23 21:28:33,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635727025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:33,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [252256543] [2023-11-23 21:28:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,482 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:28:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:28:33,487 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:28:33,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-23 21:28:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:33,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:28:33,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:33,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-23 21:28:33,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:33,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:33,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:33,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:33,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:33,701 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:33,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:33,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:33,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:33,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:33,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:33,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [252256543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:33,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351097411] [2023-11-23 21:28:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:33,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:33,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:33,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:28:34,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:34,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:28:34,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:34,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:28:34,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:34,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:34,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:34,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:34,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:28:34,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:34,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:34,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:34,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:34,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:34,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:34,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351097411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:34,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:28:34,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-23 21:28:34,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068477135] [2023-11-23 21:28:34,338 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:28:34,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 21:28:34,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:34,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 21:28:34,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-23 21:28:34,339 INFO L87 Difference]: Start difference. First operand 714 states and 1931 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:35,840 INFO L93 Difference]: Finished difference Result 726 states and 1949 transitions. [2023-11-23 21:28:35,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 21:28:35,841 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:28:35,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:35,847 INFO L225 Difference]: With dead ends: 726 [2023-11-23 21:28:35,847 INFO L226 Difference]: Without dead ends: 726 [2023-11-23 21:28:35,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-23 21:28:35,849 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:35,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 49 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-23 21:28:35,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-23 21:28:35,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 726. [2023-11-23 21:28:35,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 650 states have (on average 2.9984615384615383) internal successors, (1949), 725 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1949 transitions. [2023-11-23 21:28:35,887 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1949 transitions. Word has length 5 [2023-11-23 21:28:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:35,888 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1949 transitions. [2023-11-23 21:28:35,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:35,889 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1949 transitions. [2023-11-23 21:28:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:28:35,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:35,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:28:35,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:36,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:36,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2023-11-23 21:28:36,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 21:28:36,503 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:36,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:36,503 INFO L85 PathProgramCache]: Analyzing trace with hash 567897458, now seen corresponding path program 1 times [2023-11-23 21:28:36,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:36,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1170075353] [2023-11-23 21:28:36,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:36,504 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:36,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:36,505 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:36,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-23 21:28:36,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:36,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 21:28:36,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:36,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:36,634 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:36,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1170075353] [2023-11-23 21:28:36,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1170075353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:36,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:36,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:36,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633903830] [2023-11-23 21:28:36,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:36,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:36,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:36,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:36,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:36,636 INFO L87 Difference]: Start difference. First operand 726 states and 1949 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:36,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:36,879 INFO L93 Difference]: Finished difference Result 726 states and 1948 transitions. [2023-11-23 21:28:36,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:36,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:28:36,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:36,887 INFO L225 Difference]: With dead ends: 726 [2023-11-23 21:28:36,887 INFO L226 Difference]: Without dead ends: 726 [2023-11-23 21:28:36,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:36,888 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:36,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2023-11-23 21:28:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 726. [2023-11-23 21:28:36,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 650 states have (on average 2.996923076923077) internal successors, (1948), 725 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:36,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1948 transitions. [2023-11-23 21:28:36,917 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1948 transitions. Word has length 5 [2023-11-23 21:28:36,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:36,918 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1948 transitions. [2023-11-23 21:28:36,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:36,918 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1948 transitions. [2023-11-23 21:28:36,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:28:36,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:36,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:36,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-23 21:28:37,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:37,121 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:37,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash 288696349, now seen corresponding path program 1 times [2023-11-23 21:28:37,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:37,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [606163624] [2023-11-23 21:28:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:37,122 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:37,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:37,125 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:37,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2023-11-23 21:28:37,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:37,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 21:28:37,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:37,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:37,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:37,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 11 [2023-11-23 21:28:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:37,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:37,376 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:28:37,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-23 21:28:37,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:37,412 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 20 [2023-11-23 21:28:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:28:37,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:37,555 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:37,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [606163624] [2023-11-23 21:28:37,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [606163624] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:37,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:37,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:37,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363100040] [2023-11-23 21:28:37,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:37,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:37,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:37,558 INFO L87 Difference]: Start difference. First operand 726 states and 1948 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:37,872 INFO L93 Difference]: Finished difference Result 608 states and 1587 transitions. [2023-11-23 21:28:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:28:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:37,878 INFO L225 Difference]: With dead ends: 608 [2023-11-23 21:28:37,878 INFO L226 Difference]: Without dead ends: 608 [2023-11-23 21:28:37,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:28:37,879 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 96 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:37,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 14 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:28:37,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2023-11-23 21:28:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2023-11-23 21:28:37,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 551 states have (on average 2.88021778584392) internal successors, (1587), 607 states have internal predecessors, (1587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:37,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1587 transitions. [2023-11-23 21:28:37,904 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1587 transitions. Word has length 7 [2023-11-23 21:28:37,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:37,904 INFO L495 AbstractCegarLoop]: Abstraction has 608 states and 1587 transitions. [2023-11-23 21:28:37,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:37,904 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1587 transitions. [2023-11-23 21:28:37,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 21:28:37,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:37,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:37,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:38,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:38,109 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:38,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:38,109 INFO L85 PathProgramCache]: Analyzing trace with hash 288696350, now seen corresponding path program 1 times [2023-11-23 21:28:38,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:38,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [873922532] [2023-11-23 21:28:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:38,110 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:38,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:38,112 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:38,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 21:28:38,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:38,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 21:28:38,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:38,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:38,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:38,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-23 21:28:38,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:28:38,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:38,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 21:28:38,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:38,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:28:38,450 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:28:38,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 21:28:38,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:38,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:39,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:39,421 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:39,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [873922532] [2023-11-23 21:28:39,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [873922532] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:39,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486254452] [2023-11-23 21:28:39,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:39,422 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:28:39,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:28:39,427 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:28:39,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2023-11-23 21:28:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:39,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 21:28:39,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:39,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:39,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 21:28:39,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:39,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 21:28:39,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:39,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:39,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:39,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2023-11-23 21:28:39,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:39,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 21:28:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:28:39,885 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:39,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [486254452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:39,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:28:39,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 5] total 10 [2023-11-23 21:28:39,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359893023] [2023-11-23 21:28:39,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:39,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:39,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:28:39,887 INFO L87 Difference]: Start difference. First operand 608 states and 1587 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:40,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:40,122 INFO L93 Difference]: Finished difference Result 490 states and 1226 transitions. [2023-11-23 21:28:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 21:28:40,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:40,126 INFO L225 Difference]: With dead ends: 490 [2023-11-23 21:28:40,126 INFO L226 Difference]: Without dead ends: 490 [2023-11-23 21:28:40,126 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-11-23 21:28:40,127 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:40,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 10 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:40,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2023-11-23 21:28:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 490. [2023-11-23 21:28:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 452 states have (on average 2.7123893805309733) internal successors, (1226), 489 states have internal predecessors, (1226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1226 transitions. [2023-11-23 21:28:40,146 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1226 transitions. Word has length 7 [2023-11-23 21:28:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:40,146 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 1226 transitions. [2023-11-23 21:28:40,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1226 transitions. [2023-11-23 21:28:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:28:40,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:40,147 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:40,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:40,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 21:28:40,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:40,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:40,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:40,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997594, now seen corresponding path program 1 times [2023-11-23 21:28:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:40,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [991124290] [2023-11-23 21:28:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:40,554 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:40,555 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:40,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 (13)] Waiting until timeout for monitored process [2023-11-23 21:28:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:40,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:28:40,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:40,707 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 21:28:40,708 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 21 treesize of output 15 [2023-11-23 21:28:40,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:40,719 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:28:40,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 1 [2023-11-23 21:28:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:40,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:40,745 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 21:28:40,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-23 21:28:40,767 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 21:28:40,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 21:28:40,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:28:40,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:40,798 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:40,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [991124290] [2023-11-23 21:28:40,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [991124290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:40,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:40,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:28:40,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529288720] [2023-11-23 21:28:40,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:40,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:40,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:40,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:40,800 INFO L87 Difference]: Start difference. First operand 490 states and 1226 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:40,968 INFO L93 Difference]: Finished difference Result 468 states and 1181 transitions. [2023-11-23 21:28:40,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:40,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 21:28:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:40,972 INFO L225 Difference]: With dead ends: 468 [2023-11-23 21:28:40,972 INFO L226 Difference]: Without dead ends: 468 [2023-11-23 21:28:40,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:40,973 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:40,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 12 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-23 21:28:40,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 468. [2023-11-23 21:28:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 439 states have (on average 2.6902050113895215) internal successors, (1181), 467 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1181 transitions. [2023-11-23 21:28:40,989 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1181 transitions. Word has length 10 [2023-11-23 21:28:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:40,989 INFO L495 AbstractCegarLoop]: Abstraction has 468 states and 1181 transitions. [2023-11-23 21:28:40,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:40,990 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1181 transitions. [2023-11-23 21:28:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:28:40,990 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:40,997 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:41,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:41,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:41,201 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:41,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:41,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2028997595, now seen corresponding path program 1 times [2023-11-23 21:28:41,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:41,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [288289565] [2023-11-23 21:28:41,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:41,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:41,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:41,205 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:41,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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)] Waiting until timeout for monitored process [2023-11-23 21:28:41,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:41,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 21:28:41,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:41,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:41,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-11-23 21:28:41,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 21:28:41,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:41,382 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:28:41,386 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 21:28:41,418 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-23 21:28:41,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 21:28:41,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:41,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:42,161 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:42,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [288289565] [2023-11-23 21:28:42,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [288289565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:42,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [161140124] [2023-11-23 21:28:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:42,162 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:28:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:28:42,163 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:28:42,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-11-23 21:28:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:42,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:28:42,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:42,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:42,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-11-23 21:28:42,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:42,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:42,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:28:42,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:42,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:42,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 21:28:42,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:42,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 21:28:42,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:28:42,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:42,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [161140124] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:42,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:28:42,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 5] total 11 [2023-11-23 21:28:42,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027820068] [2023-11-23 21:28:42,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:42,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:42,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:42,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:42,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:28:42,687 INFO L87 Difference]: Start difference. First operand 468 states and 1181 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:42,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:42,892 INFO L93 Difference]: Finished difference Result 446 states and 1136 transitions. [2023-11-23 21:28:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:42,893 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-23 21:28:42,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:42,897 INFO L225 Difference]: With dead ends: 446 [2023-11-23 21:28:42,897 INFO L226 Difference]: Without dead ends: 446 [2023-11-23 21:28:42,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:28:42,898 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 44 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:42,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 8 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:28:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-23 21:28:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2023-11-23 21:28:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 426 states have (on average 2.6666666666666665) internal successors, (1136), 445 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:42,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1136 transitions. [2023-11-23 21:28:42,918 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1136 transitions. Word has length 10 [2023-11-23 21:28:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:42,918 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 1136 transitions. [2023-11-23 21:28:42,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:42,919 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1136 transitions. [2023-11-23 21:28:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:28:42,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:42,920 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-23 21:28:42,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:43,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:43,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:43,323 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:28:43,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:43,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1110995044, now seen corresponding path program 2 times [2023-11-23 21:28:43,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:28:43,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [37491245] [2023-11-23 21:28:43,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:28:43,325 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:28:43,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:28:43,327 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:28:43,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 (16)] Waiting until timeout for monitored process [2023-11-23 21:28:43,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:28:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:28:43,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 21:28:43,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:43,470 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:28:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:43,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:43,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:43,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:43,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:43,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:28:43,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:43,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:43,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:43,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:43,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:43,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:44,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:44,574 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:28:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [37491245] [2023-11-23 21:28:44,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [37491245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:44,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2015401939] [2023-11-23 21:28:44,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:28:44,575 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:28:44,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:28:44,576 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:28:44,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2023-11-23 21:28:44,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:28:44,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:28:44,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:28:44,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:44,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-23 21:28:44,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:44,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:44,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:44,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:44,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:44,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:44,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:44,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:44,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:45,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:45,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2015401939] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866069459] [2023-11-23 21:28:46,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:28:46,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:46,127 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:46,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-23 21:28:46,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:28:46,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:28:46,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:28:46,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:46,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-11-23 21:28:46,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:46,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:46,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:46,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:46,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:46,302 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:46,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:46,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:28:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:28:46,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:28:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:46,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:28:46,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866069459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:46,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:28:46,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 17 [2023-11-23 21:28:46,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297457632] [2023-11-23 21:28:46,873 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:28:46,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-23 21:28:46,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:28:46,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-23 21:28:46,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:28:46,875 INFO L87 Difference]: Start difference. First operand 446 states and 1136 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:28:52,247 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:28:53,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:28:54,477 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:28:56,507 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:29:00,602 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:29:01,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:29:03,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:29:06,189 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-11-23 21:29:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:07,083 INFO L93 Difference]: Finished difference Result 471 states and 1173 transitions. [2023-11-23 21:29:07,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-23 21:29:07,085 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-23 21:29:07,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:07,089 INFO L225 Difference]: With dead ends: 471 [2023-11-23 21:29:07,089 INFO L226 Difference]: Without dead ends: 471 [2023-11-23 21:29:07,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=398, Invalid=862, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 21:29:07,090 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 62 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:07,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 88 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 570 Invalid, 2 Unknown, 0 Unchecked, 17.1s Time] [2023-11-23 21:29:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-11-23 21:29:07,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 470. [2023-11-23 21:29:07,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 450 states have (on average 2.6066666666666665) internal successors, (1173), 469 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:07,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1173 transitions. [2023-11-23 21:29:07,108 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1173 transitions. Word has length 11 [2023-11-23 21:29:07,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:07,108 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 1173 transitions. [2023-11-23 21:29:07,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:07,108 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1173 transitions. [2023-11-23 21:29:07,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 21:29:07,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:07,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:07,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:07,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 (16)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:07,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:07,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 21:29:07,730 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:29:07,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1525528893, now seen corresponding path program 1 times [2023-11-23 21:29:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:29:07,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881612766] [2023-11-23 21:29:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:07,731 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:29:07,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:29:07,732 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:29:07,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 (19)] Waiting until timeout for monitored process [2023-11-23 21:29:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:07,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:29:07,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:07,932 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:07,933 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:29:07,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881612766] [2023-11-23 21:29:07,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881612766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:07,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:07,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 21:29:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005494746] [2023-11-23 21:29:07,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:07,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 21:29:07,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:29:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 21:29:07,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-23 21:29:07,935 INFO L87 Difference]: Start difference. First operand 470 states and 1173 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:08,376 INFO L93 Difference]: Finished difference Result 770 states and 1962 transitions. [2023-11-23 21:29:08,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 21:29:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-23 21:29:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:08,383 INFO L225 Difference]: With dead ends: 770 [2023-11-23 21:29:08,383 INFO L226 Difference]: Without dead ends: 770 [2023-11-23 21:29:08,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:29:08,384 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 39 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:08,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:29:08,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 770 states. [2023-11-23 21:29:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 770 to 620. [2023-11-23 21:29:08,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 600 states have (on average 2.805) internal successors, (1683), 619 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:08,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1683 transitions. [2023-11-23 21:29:08,409 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1683 transitions. Word has length 11 [2023-11-23 21:29:08,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:08,410 INFO L495 AbstractCegarLoop]: Abstraction has 620 states and 1683 transitions. [2023-11-23 21:29:08,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:08,410 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1683 transitions. [2023-11-23 21:29:08,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:29:08,411 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:08,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:08,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 (19)] Forceful destruction successful, exit code 0 [2023-11-23 21:29:08,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:29:08,615 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:29:08,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1449400796, now seen corresponding path program 1 times [2023-11-23 21:29:08,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:29:08,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224742007] [2023-11-23 21:29:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:08,616 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:29:08,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:29:08,617 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:29:08,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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)] Waiting until timeout for monitored process [2023-11-23 21:29:08,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:08,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:29:08,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:08,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:29:08,840 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:29:08,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224742007] [2023-11-23 21:29:08,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224742007] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:29:08,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:29:08,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:29:08,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580001888] [2023-11-23 21:29:08,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:29:08,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:29:08,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:29:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:29:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:29:08,841 INFO L87 Difference]: Start difference. First operand 620 states and 1683 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:29:09,129 INFO L93 Difference]: Finished difference Result 880 states and 2284 transitions. [2023-11-23 21:29:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:29:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 21:29:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:29:09,137 INFO L225 Difference]: With dead ends: 880 [2023-11-23 21:29:09,137 INFO L226 Difference]: Without dead ends: 838 [2023-11-23 21:29:09,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 21:29:09,138 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:29:09,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 49 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:29:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2023-11-23 21:29:09,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 807. [2023-11-23 21:29:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 786 states have (on average 2.707379134860051) internal successors, (2128), 806 states have internal predecessors, (2128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:09,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2128 transitions. [2023-11-23 21:29:09,167 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2128 transitions. Word has length 13 [2023-11-23 21:29:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:29:09,168 INFO L495 AbstractCegarLoop]: Abstraction has 807 states and 2128 transitions. [2023-11-23 21:29:09,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:29:09,168 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2128 transitions. [2023-11-23 21:29:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 21:29:09,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:29:09,170 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:29:09,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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)] Ended with exit code 0 [2023-11-23 21:29:09,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:29:09,374 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-11-23 21:29:09,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:29:09,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1433362279, now seen corresponding path program 1 times [2023-11-23 21:29:09,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:29:09,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2061639283] [2023-11-23 21:29:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:09,375 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:29:09,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:29:09,376 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:29:09,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/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 21:29:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:09,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-23 21:29:09,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:09,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:29:09,623 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 21:29:09,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:09,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:09,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:29:09,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:09,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 21:29:09,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:09,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:09,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:09,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:29:09,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:09,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:09,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:09,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 21:29:09,918 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:29:09,919 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 21:29:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:10,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:11,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:11,438 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:29:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2061639283] [2023-11-23 21:29:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2061639283] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:11,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1802516332] [2023-11-23 21:29:11,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:11,439 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:29:11,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:29:11,443 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:29:11,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2023-11-23 21:29:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:11,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 21:29:11,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:11,746 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 21:29:11,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:29:11,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:11,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:11,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:29:11,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:11,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:11,818 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 21:29:11,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:11,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:29:11,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:11,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:12,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:12,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 21:29:12,113 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:29:12,113 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 21:29:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:12,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:13,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1802516332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:13,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310654273] [2023-11-23 21:29:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:29:13,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:29:13,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:29:13,110 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:29:13,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f3137bcb-af26-412e-9f93-8f4826168a63/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-23 21:29:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:29:13,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 21:29:13,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:29:13,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-11-23 21:29:13,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-23 21:29:13,269 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 21:29:13,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:13,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:29:13,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:13,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:13,300 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 21:29:13,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:13,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 21:29:13,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:13,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 21:29:13,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:13,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 1 [2023-11-23 21:29:13,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 21:29:13,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 21:29:13,455 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 21:29:13,455 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 21:29:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:13,625 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:29:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:29:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310654273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:29:14,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:29:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2023-11-23 21:29:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430568066] [2023-11-23 21:29:14,393 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:29:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 21:29:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:29:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 21:29:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-23 21:29:14,395 INFO L87 Difference]: Start difference. First operand 807 states and 2128 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)