./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-horseshoe.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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:11,955 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:12,070 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 20:36:12,076 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:12,077 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:12,101 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:12,102 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:12,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:12,103 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:12,104 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:12,105 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:12,105 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:12,106 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:12,106 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:12,107 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:12,108 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:12,108 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:12,109 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:12,109 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:12,110 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:12,110 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:12,111 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:12,112 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:36:12,113 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:36:12,113 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:12,114 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:12,114 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:12,115 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:12,115 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:12,116 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:36:12,116 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:36:12,117 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:36:12,117 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:12,118 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:36:12,118 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:36:12,119 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:12,119 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:12,119 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:12,120 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:12,120 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:12,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:12,121 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:12,121 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:12,121 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:12,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:12,122 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:12,122 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:12,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:12,122 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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d [2023-11-23 20:36:12,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:12,459 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:12,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:12,463 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:12,464 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:12,465 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-23 20:36:15,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:15,856 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:15,856 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-23 20:36:15,868 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data/34e34390a/0264d8a85899493f90e71422b27c633f/FLAGf374a40cf [2023-11-23 20:36:15,887 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data/34e34390a/0264d8a85899493f90e71422b27c633f [2023-11-23 20:36:15,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:15,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:15,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:15,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:15,908 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:15,909 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:15" (1/1) ... [2023-11-23 20:36:15,910 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128152fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:15, skipping insertion in model container [2023-11-23 20:36:15,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:15" (1/1) ... [2023-11-23 20:36:15,953 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:16,237 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:16,249 ERROR L324 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2023-11-23 20:36:16,249 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29483a8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:16, skipping insertion in model container [2023-11-23 20:36:16,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:16,250 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 20:36:16,252 INFO L158 Benchmark]: Toolchain (without parser) took 354.60ms. Allocated memory is still 169.9MB. Free memory was 125.1MB in the beginning and 114.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:16,253 INFO L158 Benchmark]: CDTParser took 0.46ms. Allocated memory is still 113.2MB. Free memory was 61.6MB in the beginning and 61.4MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:16,253 INFO L158 Benchmark]: CACSL2BoogieTranslator took 348.13ms. Allocated memory is still 169.9MB. Free memory was 125.1MB in the beginning and 115.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:16,255 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.46ms. Allocated memory is still 113.2MB. Free memory was 61.6MB in the beginning and 61.4MB in the end (delta: 159.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 348.13ms. Allocated memory is still 169.9MB. Free memory was 125.1MB in the beginning and 115.1MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 136]: 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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:18,627 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:18,702 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 20:36:18,708 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:18,709 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:18,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:18,779 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:18,780 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:18,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:18,786 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:18,787 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:18,788 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:18,788 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:18,790 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:18,790 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:18,791 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:18,791 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:36:18,792 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:36:18,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:18,793 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:18,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:18,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:18,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:18,795 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:36:18,796 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:36:18,796 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:36:18,797 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:18,797 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:36:18,797 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 20:36:18,798 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 20:36:18,799 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:36:18,800 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:18,800 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:18,800 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:18,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 20:36:18,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:18,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:18,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:18,803 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:18,803 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:18,803 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 20:36:18,804 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 20:36:18,804 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:18,804 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:18,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:18,805 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_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ceb2af5016fd0ad74653237fbc44a2b3541e4ff971325e3807dab6f19c05af6d [2023-11-23 20:36:19,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:19,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:19,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:19,287 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:19,287 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:19,290 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-23 20:36:22,618 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:22,910 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:22,911 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/sv-benchmarks/c/weaver/popl20-horseshoe.wvr.c [2023-11-23 20:36:22,920 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data/952ddd5dc/b2130d4404ea4c58996f12ae8008c9ac/FLAG934d34427 [2023-11-23 20:36:22,934 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/data/952ddd5dc/b2130d4404ea4c58996f12ae8008c9ac [2023-11-23 20:36:22,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:22,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:22,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:22,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:22,946 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:22,947 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:22" (1/1) ... [2023-11-23 20:36:22,948 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a5e1dbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:22, skipping insertion in model container [2023-11-23 20:36:22,948 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:22" (1/1) ... [2023-11-23 20:36:22,993 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:23,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:23,219 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 20:36:23,236 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:23,283 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:23,300 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:23,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:23,349 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:36:23,350 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-23 20:36:23,358 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:23,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23 WrapperNode [2023-11-23 20:36:23,358 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:23,360 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:23,360 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:23,360 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:23,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,381 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,430 INFO L138 Inliner]: procedures = 27, calls = 56, calls flagged for inlining = 17, calls inlined = 19, statements flattened = 252 [2023-11-23 20:36:23,430 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:23,431 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:23,431 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:23,432 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:23,445 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,480 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,501 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,504 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,506 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:23,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:23,512 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:23,512 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:23,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (1/1) ... [2023-11-23 20:36:23,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:23,555 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:23,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:23,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 20:36:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 20:36:23,619 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 20:36:23,621 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 20:36:23,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 20:36:23,622 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 20:36:23,622 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 20:36:23,623 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 20:36:23,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-23 20:36:23,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-23 20:36:23,623 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:23,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:23,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:23,625 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:23,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 20:36:23,627 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 20:36:23,820 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:23,824 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:24,636 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:25,134 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:25,134 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-23 20:36:25,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:25 BoogieIcfgContainer [2023-11-23 20:36:25,135 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:25,137 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:25,138 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:25,141 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:25,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:22" (1/3) ... [2023-11-23 20:36:25,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1707b8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:25, skipping insertion in model container [2023-11-23 20:36:25,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:23" (2/3) ... [2023-11-23 20:36:25,142 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1707b8a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:25, skipping insertion in model container [2023-11-23 20:36:25,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:25" (3/3) ... [2023-11-23 20:36:25,144 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-horseshoe.wvr.c [2023-11-23 20:36:25,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:25,164 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 28 error locations. [2023-11-23 20:36:25,164 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 20:36:25,268 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 20:36:25,299 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 85 places, 82 transitions, 185 flow [2023-11-23 20:36:25,694 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7258 states, 6930 states have (on average 3.9988455988455986) internal successors, (27712), 7257 states have internal predecessors, (27712), 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 20:36:25,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:25,735 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;@4f9e0f67, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:25,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-23 20:36:25,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 7258 states, 6930 states have (on average 3.9988455988455986) internal successors, (27712), 7257 states have internal predecessors, (27712), 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 20:36:25,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 20:36:25,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:25,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 20:36:25,793 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:25,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:25,800 INFO L85 PathProgramCache]: Analyzing trace with hash 759622, now seen corresponding path program 1 times [2023-11-23 20:36:25,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:25,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901104676] [2023-11-23 20:36:25,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:25,815 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:25,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:25,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:25,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 20:36:25,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:26,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:26,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:26,104 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 20:36:26,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,132 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 20:36:26,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,158 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 20:36:26,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,176 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 20:36:26,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,208 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 20:36:26,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 20:36:26,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 20:36:26,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,296 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 20:36:26,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,308 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 20:36:26,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 20:36:26,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,334 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 20:36:26,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,340 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 20:36:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,361 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 20:36:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,377 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 20:36:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,387 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 20:36:26,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,393 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 20:36:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,404 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 20:36:26,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,411 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 20:36:26,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,432 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 20:36:26,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,442 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 20:36:26,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,450 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 20:36:26,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,459 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 20:36:26,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,470 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 20:36:26,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:26,476 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 20:36:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:26,487 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:26,487 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:26,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901104676] [2023-11-23 20:36:26,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901104676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:26,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:26,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:36:26,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003737525] [2023-11-23 20:36:26,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:26,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:26,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:26,547 INFO L87 Difference]: Start difference. First operand has 7258 states, 6930 states have (on average 3.9988455988455986) internal successors, (27712), 7257 states have internal predecessors, (27712), 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 20:36:27,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:27,018 INFO L93 Difference]: Finished difference Result 7254 states and 26388 transitions. [2023-11-23 20:36:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:27,022 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 20:36:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:27,142 INFO L225 Difference]: With dead ends: 7254 [2023-11-23 20:36:27,143 INFO L226 Difference]: Without dead ends: 7254 [2023-11-23 20:36:27,144 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 20:36:27,148 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:27,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:27,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7254 states. [2023-11-23 20:36:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7254 to 7254. [2023-11-23 20:36:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7254 states, 6929 states have (on average 3.808341752056574) internal successors, (26388), 7253 states have internal predecessors, (26388), 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 20:36:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7254 states to 7254 states and 26388 transitions. [2023-11-23 20:36:27,794 INFO L78 Accepts]: Start accepts. Automaton has 7254 states and 26388 transitions. Word has length 3 [2023-11-23 20:36:27,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:27,794 INFO L495 AbstractCegarLoop]: Abstraction has 7254 states and 26388 transitions. [2023-11-23 20:36:27,795 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 20:36:27,795 INFO L276 IsEmpty]: Start isEmpty. Operand 7254 states and 26388 transitions. [2023-11-23 20:36:27,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 20:36:27,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:27,796 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 20:36:27,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:27,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:28,000 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:28,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash 759623, now seen corresponding path program 1 times [2023-11-23 20:36:28,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:28,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1463893736] [2023-11-23 20:36:28,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:28,003 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:28,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:28,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:28,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 20:36:28,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:28,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:28,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:28,157 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 20:36:28,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,174 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 20:36:28,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,199 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 20:36:28,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,211 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 20:36:28,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,238 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 20:36:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:28,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,292 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 20:36:28,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,314 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 20:36:28,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,328 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 20:36:28,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:36:28,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,349 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 20:36:28,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,358 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 20:36:28,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,371 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 20:36:28,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,382 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 20:36:28,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,406 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 20:36:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,419 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 20:36:28,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,433 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 20:36:28,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,441 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 20:36:28,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,462 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 20:36:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,473 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 20:36:28,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,495 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 20:36:28,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,503 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 20:36:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,518 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 20:36:28,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:28,556 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 20:36:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:28,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:28,640 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:28,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1463893736] [2023-11-23 20:36:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1463893736] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:28,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274214508] [2023-11-23 20:36:28,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:28,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:28,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:28,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:28,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:28,644 INFO L87 Difference]: Start difference. First operand 7254 states and 26388 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 20:36:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:29,352 INFO L93 Difference]: Finished difference Result 7258 states and 26394 transitions. [2023-11-23 20:36:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:29,353 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 20:36:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:29,448 INFO L225 Difference]: With dead ends: 7258 [2023-11-23 20:36:29,448 INFO L226 Difference]: Without dead ends: 7258 [2023-11-23 20:36:29,448 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 20:36:29,449 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:29,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:36:29,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7258 states. [2023-11-23 20:36:29,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7258 to 7258. [2023-11-23 20:36:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7258 states, 6933 states have (on average 3.807009952401558) internal successors, (26394), 7257 states have internal predecessors, (26394), 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 20:36:29,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7258 states to 7258 states and 26394 transitions. [2023-11-23 20:36:29,886 INFO L78 Accepts]: Start accepts. Automaton has 7258 states and 26394 transitions. Word has length 3 [2023-11-23 20:36:29,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:29,887 INFO L495 AbstractCegarLoop]: Abstraction has 7258 states and 26394 transitions. [2023-11-23 20:36:29,887 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 20:36:29,887 INFO L276 IsEmpty]: Start isEmpty. Operand 7258 states and 26394 transitions. [2023-11-23 20:36:29,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:36:29,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:29,888 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 20:36:29,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:30,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:30,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:30,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:30,096 INFO L85 PathProgramCache]: Analyzing trace with hash 23549195, now seen corresponding path program 1 times [2023-11-23 20:36:30,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:30,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867801138] [2023-11-23 20:36:30,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:30,097 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:30,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:30,101 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:30,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2023-11-23 20:36:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:30,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:36:30,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:30,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,369 INFO L349 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2023-11-23 20:36:30,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 22 [2023-11-23 20:36:30,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,436 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:30,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2023-11-23 20:36:30,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,503 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:30,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 18 [2023-11-23 20:36:30,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,541 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 20:36:30,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,664 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 20:36:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:30,712 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:30,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-23 20:36:30,777 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:36:30,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:36:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:30,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:30,831 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:30,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867801138] [2023-11-23 20:36:30,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867801138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:30,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:30,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:36:30,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448787284] [2023-11-23 20:36:30,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:30,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:30,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:30,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:30,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:30,837 INFO L87 Difference]: Start difference. First operand 7258 states and 26394 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 20:36:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:31,168 INFO L93 Difference]: Finished difference Result 6069 states and 21641 transitions. [2023-11-23 20:36:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 20:36:31,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:31,208 INFO L225 Difference]: With dead ends: 6069 [2023-11-23 20:36:31,208 INFO L226 Difference]: Without dead ends: 6069 [2023-11-23 20:36:31,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 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 20:36:31,210 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:31,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 18 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:31,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6069 states. [2023-11-23 20:36:31,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6069 to 6069. [2023-11-23 20:36:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6069 states, 5820 states have (on average 3.718384879725086) internal successors, (21641), 6068 states have internal predecessors, (21641), 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 20:36:31,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6069 states to 6069 states and 21641 transitions. [2023-11-23 20:36:31,538 INFO L78 Accepts]: Start accepts. Automaton has 6069 states and 21641 transitions. Word has length 4 [2023-11-23 20:36:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:31,538 INFO L495 AbstractCegarLoop]: Abstraction has 6069 states and 21641 transitions. [2023-11-23 20:36:31,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 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 20:36:31,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6069 states and 21641 transitions. [2023-11-23 20:36:31,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:36:31,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:31,540 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 20:36:31,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-23 20:36:31,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:31,742 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:31,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:31,743 INFO L85 PathProgramCache]: Analyzing trace with hash 23549196, now seen corresponding path program 1 times [2023-11-23 20:36:31,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:31,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377993031] [2023-11-23 20:36:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:31,744 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:31,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:31,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:31,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-23 20:36:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:31,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:36:31,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:31,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:31,927 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 5 [2023-11-23 20:36:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:31,950 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 20:36:31,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:31,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:31,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 20:36:32,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,046 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 11 treesize of output 1 [2023-11-23 20:36:32,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 20:36:32,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 5 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 20:36:32,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,204 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 11 treesize of output 1 [2023-11-23 20:36:32,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:32,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:36:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:32,321 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:32,321 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:32,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377993031] [2023-11-23 20:36:32,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377993031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:32,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:32,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:32,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211027905] [2023-11-23 20:36:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:32,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:32,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:32,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:32,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:32,323 INFO L87 Difference]: Start difference. First operand 6069 states and 21641 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 20:36:32,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:32,675 INFO L93 Difference]: Finished difference Result 4880 states and 16888 transitions. [2023-11-23 20:36:32,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:32,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 20:36:32,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:32,704 INFO L225 Difference]: With dead ends: 4880 [2023-11-23 20:36:32,704 INFO L226 Difference]: Without dead ends: 4880 [2023-11-23 20:36:32,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:32,706 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:32,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 16 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:32,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4880 states. [2023-11-23 20:36:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4880 to 4880. [2023-11-23 20:36:32,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4880 states, 4707 states have (on average 3.5878478861270446) internal successors, (16888), 4879 states have internal predecessors, (16888), 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 20:36:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4880 states to 4880 states and 16888 transitions. [2023-11-23 20:36:32,992 INFO L78 Accepts]: Start accepts. Automaton has 4880 states and 16888 transitions. Word has length 4 [2023-11-23 20:36:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:32,993 INFO L495 AbstractCegarLoop]: Abstraction has 4880 states and 16888 transitions. [2023-11-23 20:36:32,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 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 20:36:32,993 INFO L276 IsEmpty]: Start isEmpty. Operand 4880 states and 16888 transitions. [2023-11-23 20:36:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:36:32,994 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:32,994 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-23 20:36:33,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:33,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:33,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:33,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:33,198 INFO L85 PathProgramCache]: Analyzing trace with hash 730021200, now seen corresponding path program 1 times [2023-11-23 20:36:33,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:33,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457270548] [2023-11-23 20:36:33,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:33,199 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:33,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:33,200 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:33,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:33,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:33,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 20:36:33,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:33,312 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 20:36:33,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,328 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 20:36:33,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,343 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 20:36:33,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,353 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 20:36:33,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,377 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 20:36:33,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,389 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 20:36:33,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:36:33,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,414 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 20:36:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,427 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 20:36:33,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,436 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 20:36:33,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,452 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 20:36:33,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,474 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 20:36:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,507 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 20:36:33,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,521 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 20:36:33,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,533 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 20:36:33,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,547 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 20:36:33,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,558 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 20:36:33,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,580 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 20:36:33,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:33,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,658 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 20:36:33,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,679 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 20:36:33,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,702 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 20:36:33,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,724 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 20:36:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:33,750 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 20:36:33,953 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 20:36:33,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:34,422 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 20:36:34,423 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457270548] [2023-11-23 20:36:34,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457270548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:34,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [931612888] [2023-11-23 20:36:34,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:34,424 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:36:34,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:36:34,430 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:36:34,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-23 20:36:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:34,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:36:34,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:34,607 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 20:36:34,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,620 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 20:36:34,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,635 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 20:36:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,647 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 20:36:34,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,663 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 20:36:34,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,688 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 20:36:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,705 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 20:36:34,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:36:34,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,724 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 20:36:34,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,736 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 20:36:34,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,750 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 20:36:34,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,772 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 20:36:34,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,802 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 20:36:34,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,815 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 20:36:34,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,832 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 20:36:34,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,854 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 20:36:34,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,881 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 20:36:34,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:34,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,932 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 20:36:34,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,944 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 20:36:34,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,956 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 20:36:34,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,964 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 20:36:34,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:34,992 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 20:36:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,004 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 20:36:35,087 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 20:36:35,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:35,214 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 20:36:35,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [931612888] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042404698] [2023-11-23 20:36:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:35,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:35,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:35,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:35,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:36:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:35,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:35,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:35,403 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 20:36:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,427 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 20:36:35,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,436 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 20:36:35,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,447 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 20:36:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,458 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 20:36:35,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,466 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 20:36:35,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,488 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 20:36:35,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 20:36:35,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,510 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 20:36:35,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,517 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 20:36:35,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,529 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 20:36:35,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:36:35,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,561 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 20:36:35,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,571 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 20:36:35,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,592 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 20:36:35,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,603 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 20:36:35,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:35,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,660 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 20:36:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,669 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 20:36:35,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,679 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 20:36:35,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,691 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 20:36:35,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,698 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 20:36:35,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,719 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 20:36:35,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:35,729 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 20:36:35,818 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 20:36:35,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:35,918 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 20:36:35,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042404698] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:35,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:36:35,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-23 20:36:35,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299585523] [2023-11-23 20:36:35,919 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:35,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 20:36:35,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:35,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 20:36:35,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:36:35,920 INFO L87 Difference]: Start difference. First operand 4880 states and 16888 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 20:36:37,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:37,810 INFO L93 Difference]: Finished difference Result 4892 states and 16906 transitions. [2023-11-23 20:36:37,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:36:37,811 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 20:36:37,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:37,842 INFO L225 Difference]: With dead ends: 4892 [2023-11-23 20:36:37,843 INFO L226 Difference]: Without dead ends: 4892 [2023-11-23 20:36:37,843 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 20:36:37,844 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:37,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 92 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 20:36:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4892 states. [2023-11-23 20:36:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4892 to 4892. [2023-11-23 20:36:38,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4892 states, 4719 states have (on average 3.582538673447764) internal successors, (16906), 4891 states have internal predecessors, (16906), 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 20:36:38,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4892 states to 4892 states and 16906 transitions. [2023-11-23 20:36:38,060 INFO L78 Accepts]: Start accepts. Automaton has 4892 states and 16906 transitions. Word has length 5 [2023-11-23 20:36:38,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:38,060 INFO L495 AbstractCegarLoop]: Abstraction has 4892 states and 16906 transitions. [2023-11-23 20:36:38,060 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 20:36:38,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4892 states and 16906 transitions. [2023-11-23 20:36:38,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:36:38,061 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:38,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:38,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:38,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:38,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:38,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:38,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:38,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:38,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1475175076, now seen corresponding path program 1 times [2023-11-23 20:36:38,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:38,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473204619] [2023-11-23 20:36:38,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:38,665 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:38,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:38,673 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:38,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:38,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:38,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:38,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:38,869 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 15 treesize of output 11 [2023-11-23 20:36:38,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:38,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:38,916 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:38,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-23 20:36:38,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:38,969 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:38,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 15 [2023-11-23 20:36:38,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,004 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 15 treesize of output 11 [2023-11-23 20:36:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,044 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 20:36:39,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,094 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:39,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 15 [2023-11-23 20:36:39,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,141 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 0 case distinctions, treesize of input 22 treesize of output 11 [2023-11-23 20:36:39,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:39,213 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:39,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-11-23 20:36:39,272 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:36:39,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:36:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:39,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:39,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:39,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473204619] [2023-11-23 20:36:39,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473204619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:39,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:39,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:36:39,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032637997] [2023-11-23 20:36:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:39,347 INFO L87 Difference]: Start difference. First operand 4892 states and 16906 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 20:36:39,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:39,609 INFO L93 Difference]: Finished difference Result 4773 states and 16560 transitions. [2023-11-23 20:36:39,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:39,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 20:36:39,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:39,644 INFO L225 Difference]: With dead ends: 4773 [2023-11-23 20:36:39,644 INFO L226 Difference]: Without dead ends: 4773 [2023-11-23 20:36:39,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 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 20:36:39,645 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:39,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 16 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:39,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2023-11-23 20:36:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4773. [2023-11-23 20:36:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4773 states, 4620 states have (on average 3.5844155844155843) internal successors, (16560), 4772 states have internal predecessors, (16560), 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 20:36:39,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4773 states to 4773 states and 16560 transitions. [2023-11-23 20:36:39,866 INFO L78 Accepts]: Start accepts. Automaton has 4773 states and 16560 transitions. Word has length 7 [2023-11-23 20:36:39,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:39,866 INFO L495 AbstractCegarLoop]: Abstraction has 4773 states and 16560 transitions. [2023-11-23 20:36:39,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 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 20:36:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4773 states and 16560 transitions. [2023-11-23 20:36:39,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:36:39,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:39,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:39,878 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:40,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:40,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:40,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:40,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1475175077, now seen corresponding path program 1 times [2023-11-23 20:36:40,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:40,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038618233] [2023-11-23 20:36:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:40,072 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:40,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:40,073 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:40,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:40,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 20:36:40,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:40,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,255 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 20:36:40,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,310 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:40,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 20:36:40,385 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:40,390 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,431 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 20:36:40,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,450 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 20:36:40,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,478 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 20:36:40,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,514 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 20:36:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:40,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:36:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:40,668 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:40,668 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:40,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038618233] [2023-11-23 20:36:40,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038618233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:40,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:40,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:40,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739134505] [2023-11-23 20:36:40,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:40,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:40,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:40,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:40,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:40,671 INFO L87 Difference]: Start difference. First operand 4773 states and 16560 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 20:36:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:40,962 INFO L93 Difference]: Finished difference Result 4654 states and 16214 transitions. [2023-11-23 20:36:40,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:40,963 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 20:36:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:40,984 INFO L225 Difference]: With dead ends: 4654 [2023-11-23 20:36:40,984 INFO L226 Difference]: Without dead ends: 4654 [2023-11-23 20:36:40,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:40,986 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:40,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 14 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:40,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4654 states. [2023-11-23 20:36:41,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654. [2023-11-23 20:36:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4521 states have (on average 3.586374695863747) internal successors, (16214), 4653 states have internal predecessors, (16214), 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 20:36:41,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 16214 transitions. [2023-11-23 20:36:41,194 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 16214 transitions. Word has length 7 [2023-11-23 20:36:41,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:41,195 INFO L495 AbstractCegarLoop]: Abstraction has 4654 states and 16214 transitions. [2023-11-23 20:36:41,195 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 20:36:41,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 16214 transitions. [2023-11-23 20:36:41,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:36:41,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:41,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:41,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:41,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:41,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:41,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1514140630, now seen corresponding path program 1 times [2023-11-23 20:36:41,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:41,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [935195358] [2023-11-23 20:36:41,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:41,402 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:41,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:41,404 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:41,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2023-11-23 20:36:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:41,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:36:41,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:41,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:41,564 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:41,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [935195358] [2023-11-23 20:36:41,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [935195358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:41,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:41,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:41,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873312611] [2023-11-23 20:36:41,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:41,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:41,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:41,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:41,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:41,567 INFO L87 Difference]: Start difference. First operand 4654 states and 16214 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:41,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:41,971 INFO L93 Difference]: Finished difference Result 5063 states and 17397 transitions. [2023-11-23 20:36:41,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:41,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-23 20:36:41,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:42,005 INFO L225 Difference]: With dead ends: 5063 [2023-11-23 20:36:42,005 INFO L226 Difference]: Without dead ends: 4991 [2023-11-23 20:36:42,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:42,006 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:42,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:36:42,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2023-11-23 20:36:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4990. [2023-11-23 20:36:42,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4990 states, 4849 states have (on average 3.541967415962054) internal successors, (17175), 4989 states have internal predecessors, (17175), 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 20:36:42,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4990 states to 4990 states and 17175 transitions. [2023-11-23 20:36:42,173 INFO L78 Accepts]: Start accepts. Automaton has 4990 states and 17175 transitions. Word has length 8 [2023-11-23 20:36:42,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:42,173 INFO L495 AbstractCegarLoop]: Abstraction has 4990 states and 17175 transitions. [2023-11-23 20:36:42,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:42,174 INFO L276 IsEmpty]: Start isEmpty. Operand 4990 states and 17175 transitions. [2023-11-23 20:36:42,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:36:42,175 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:42,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:42,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:42,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:42,378 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:42,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:42,378 INFO L85 PathProgramCache]: Analyzing trace with hash 836097365, now seen corresponding path program 1 times [2023-11-23 20:36:42,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:42,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [357701873] [2023-11-23 20:36:42,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:42,379 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:42,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:42,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:42,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-23 20:36:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:42,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:36:42,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:42,524 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:36:42,525 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 1 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 20:36:42,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,539 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,539 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 20:36:42,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,573 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,573 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-23 20:36:42,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,599 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,599 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 20:36:42,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,607 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,608 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 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 20:36:42,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,619 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,619 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 20:36:42,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,650 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,650 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 1 case distinctions, treesize of input 24 treesize of output 1 [2023-11-23 20:36:42,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,690 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 20:36:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,715 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,716 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 20:36:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,741 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 1 [2023-11-23 20:36:42,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,751 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,751 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 1 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 20:36:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,760 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:36:42,761 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 20:36:42,779 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:36:42,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2023-11-23 20:36:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:42,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:42,805 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:42,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [357701873] [2023-11-23 20:36:42,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [357701873] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:42,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:42,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:36:42,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78818221] [2023-11-23 20:36:42,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:42,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:42,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:42,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:42,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:42,807 INFO L87 Difference]: Start difference. First operand 4990 states and 17175 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 20:36:43,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:43,011 INFO L93 Difference]: Finished difference Result 4837 states and 16732 transitions. [2023-11-23 20:36:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:43,011 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 20:36:43,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:43,031 INFO L225 Difference]: With dead ends: 4837 [2023-11-23 20:36:43,031 INFO L226 Difference]: Without dead ends: 4837 [2023-11-23 20:36:43,031 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 20:36:43,032 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:43,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 14 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:36:43,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4837 states. [2023-11-23 20:36:43,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4837 to 4837. [2023-11-23 20:36:43,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4837 states, 4726 states have (on average 3.5404147270418957) internal successors, (16732), 4836 states have internal predecessors, (16732), 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 20:36:43,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4837 states to 4837 states and 16732 transitions. [2023-11-23 20:36:43,194 INFO L78 Accepts]: Start accepts. Automaton has 4837 states and 16732 transitions. Word has length 10 [2023-11-23 20:36:43,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:43,195 INFO L495 AbstractCegarLoop]: Abstraction has 4837 states and 16732 transitions. [2023-11-23 20:36:43,195 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 20:36:43,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4837 states and 16732 transitions. [2023-11-23 20:36:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:36:43,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:43,197 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:43,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-23 20:36:43,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:43,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:43,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash 836097366, now seen corresponding path program 1 times [2023-11-23 20:36:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:43,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [352191078] [2023-11-23 20:36:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:43,401 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:43,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:43,402 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:43,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:43,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:36:43,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,583 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 20:36:43,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,603 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,632 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 20:36:43,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,657 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 20:36:43,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,672 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 20:36:43,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,685 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 20:36:43,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,709 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 20:36:43,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,722 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 20:36:43,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,739 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 20:36:43,750 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,766 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 20:36:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,773 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:43,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:43,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-23 20:36:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:43,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:43,954 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:43,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [352191078] [2023-11-23 20:36:43,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [352191078] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:43,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:43,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:43,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739272643] [2023-11-23 20:36:43,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:43,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:43,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:43,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:43,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:43,957 INFO L87 Difference]: Start difference. First operand 4837 states and 16732 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 20:36:44,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:44,291 INFO L93 Difference]: Finished difference Result 4684 states and 16289 transitions. [2023-11-23 20:36:44,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:44,292 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 20:36:44,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:44,357 INFO L225 Difference]: With dead ends: 4684 [2023-11-23 20:36:44,358 INFO L226 Difference]: Without dead ends: 4684 [2023-11-23 20:36:44,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 20:36:44,359 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:44,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 12 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:44,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4684 states. [2023-11-23 20:36:44,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4684 to 4684. [2023-11-23 20:36:44,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4603 states have (on average 3.53877905713665) internal successors, (16289), 4683 states have internal predecessors, (16289), 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 20:36:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 16289 transitions. [2023-11-23 20:36:44,503 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 16289 transitions. Word has length 10 [2023-11-23 20:36:44,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:44,503 INFO L495 AbstractCegarLoop]: Abstraction has 4684 states and 16289 transitions. [2023-11-23 20:36:44,503 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 20:36:44,503 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 16289 transitions. [2023-11-23 20:36:44,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:36:44,504 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:44,505 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:44,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:44,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:44,708 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:36:44,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:44,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1618723777, now seen corresponding path program 1 times [2023-11-23 20:36:44,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:44,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1701676534] [2023-11-23 20:36:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:44,710 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:36:44,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:44,711 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:36:44,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:36:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:44,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:36:44,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:44,905 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 20:36:44,912 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 20:36:44,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:44,943 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 20:36:44,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:44,976 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 20:36:45,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:45,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,028 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 20:36:45,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,051 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 20:36:45,063 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 20:36:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,075 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 20:36:45,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,088 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 20:36:45,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,103 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 20:36:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,127 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 20:36:45,137 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 20:36:45,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,149 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 20:36:45,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,163 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 20:36:45,175 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 20:36:45,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,187 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 20:36:45,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,200 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 20:36:45,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,217 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 20:36:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,241 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 20:36:45,251 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 20:36:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,263 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 20:36:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,276 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 20:36:45,288 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 20:36:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,300 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 20:36:45,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,314 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 20:36:45,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,329 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 20:36:45,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,354 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 20:36:45,364 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 20:36:45,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,377 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 20:36:45,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 20:36:45,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:45,578 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 20:36:45,597 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:36:45,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:36:45,701 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 20:36:45,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:46,852 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 20:36:46,852 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1701676534] [2023-11-23 20:36:46,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1701676534] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:46,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1159046332] [2023-11-23 20:36:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:46,853 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:36:46,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:36:46,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:36:46,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2023-11-23 20:36:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:47,119 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-23 20:36:47,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:47,150 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 20:36:47,162 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 7 [2023-11-23 20:36:47,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:47,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,228 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 20:36:47,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,253 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 20:36:47,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,268 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 20:36:47,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,291 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 20:36:47,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,317 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 20:36:47,325 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 20:36:47,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,337 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 20:36:47,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,356 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 20:36:47,364 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 20:36:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 20:36:47,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 20:36:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,413 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 20:36:47,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,429 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 20:36:47,437 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 20:36:47,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,448 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 20:36:47,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 20:36:47,470 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 20:36:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,481 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 20:36:47,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,496 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 20:36:47,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,519 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 20:36:47,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,535 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 20:36:47,543 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 20:36:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,554 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 20:36:47,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,567 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 20:36:47,576 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 20:36:47,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,587 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 20:36:47,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,601 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 20:36:47,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,624 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 20:36:47,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,872 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 20:36:47,888 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:36:47,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:36:47,985 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 20:36:47,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:48,705 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 20:36:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1159046332] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:48,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106111281] [2023-11-23 20:36:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:48,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:48,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:48,707 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:48,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-23 20:36:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:48,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-23 20:36:48,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:48,884 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 20:36:48,892 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 20:36:48,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:36:48,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:48,921 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 20:36:48,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:48,938 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 20:36:48,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:36:48,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:48,962 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 20:36:48,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:48,989 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 20:36:49,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,010 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 20:36:49,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,043 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 20:36:49,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,059 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 20:36:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,091 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 20:36:49,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-11-23 20:36:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,158 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 20:36:49,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,172 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 20:36:49,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,196 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 20:36:49,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:36:49,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,217 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 20:36:49,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,233 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 20:36:49,242 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:36:49,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,254 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 8 treesize of output 1 [2023-11-23 20:36:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,283 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 20:36:49,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,297 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 20:36:49,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,315 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 20:36:49,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:36:49,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,337 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 20:36:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,353 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 20:36:49,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-23 20:36:49,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,374 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 20:36:49,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,401 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 20:36:49,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,415 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 20:36:49,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:49,508 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 20:36:49,519 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2023-11-23 20:36:49,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2023-11-23 20:36:49,609 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 20:36:49,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:50,238 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 20:36:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106111281] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:50,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:36:50,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 11 [2023-11-23 20:36:50,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848545215] [2023-11-23 20:36:50,239 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:50,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-23 20:36:50,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:50,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-23 20:36:50,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-23 20:36:50,241 INFO L87 Difference]: Start difference. First operand 4684 states and 16289 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 20:36:53,116 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-23 20:37:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:00,756 INFO L93 Difference]: Finished difference Result 11358 states and 39713 transitions. [2023-11-23 20:37:00,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-23 20:37:00,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 20:37:00,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:00,807 INFO L225 Difference]: With dead ends: 11358 [2023-11-23 20:37:00,807 INFO L226 Difference]: Without dead ends: 11358 [2023-11-23 20:37:00,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2023-11-23 20:37:00,808 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 136 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:00,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 109 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 458 Invalid, 1 Unknown, 0 Unchecked, 9.2s Time] [2023-11-23 20:37:00,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11358 states. [2023-11-23 20:37:01,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11358 to 7255. [2023-11-23 20:37:01,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7255 states, 7174 states have (on average 3.6823250627265125) internal successors, (26417), 7254 states have internal predecessors, (26417), 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 20:37:01,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7255 states to 7255 states and 26417 transitions. [2023-11-23 20:37:01,179 INFO L78 Accepts]: Start accepts. Automaton has 7255 states and 26417 transitions. Word has length 10 [2023-11-23 20:37:01,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:01,180 INFO L495 AbstractCegarLoop]: Abstraction has 7255 states and 26417 transitions. [2023-11-23 20:37:01,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 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 20:37:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 7255 states and 26417 transitions. [2023-11-23 20:37:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:37:01,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:01,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:01,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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 20:37:01,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:01,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:01,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:01,786 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:37:01,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:01,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1618723776, now seen corresponding path program 1 times [2023-11-23 20:37:01,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:01,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [397876031] [2023-11-23 20:37:01,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:01,787 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:37:01,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:01,788 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:37:01,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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)] Waiting until timeout for monitored process [2023-11-23 20:37:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:01,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:37:01,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:01,943 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 20:37:01,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:01,950 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 20:37:01,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:01,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 1 [2023-11-23 20:37:01,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:01,962 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 20:37:01,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:01,980 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 20:37:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:01,991 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 20:37:02,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,013 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 20:37:02,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,023 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 20:37:02,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,029 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 20:37:02,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,038 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 20:37:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,045 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 20:37:02,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,053 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 20:37:02,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,064 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 20:37:02,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,068 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 20:37:02,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,078 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 20:37:02,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,095 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 20:37:02,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,102 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 20:37:02,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,110 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 20:37:02,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,131 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 20:37:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,140 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 20:37:02,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,159 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 20:37:02,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 1 [2023-11-23 20:37:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,202 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 20:37:02,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,209 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 20:37:02,244 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2023-11-23 20:37:02,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2023-11-23 20:37:02,265 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 20:37:02,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:02,265 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:02,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [397876031] [2023-11-23 20:37:02,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [397876031] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:02,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:02,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:02,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222629766] [2023-11-23 20:37:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:02,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:37:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:02,268 INFO L87 Difference]: Start difference. First operand 7255 states and 26417 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 20:37:02,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:02,554 INFO L93 Difference]: Finished difference Result 5716 states and 20255 transitions. [2023-11-23 20:37:02,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:02,554 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 20:37:02,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:02,569 INFO L225 Difference]: With dead ends: 5716 [2023-11-23 20:37:02,569 INFO L226 Difference]: Without dead ends: 5716 [2023-11-23 20:37:02,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:02,570 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:02,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 24 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:37:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5716 states. [2023-11-23 20:37:02,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5716 to 5716. [2023-11-23 20:37:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5716 states, 5674 states have (on average 3.569792033838562) internal successors, (20255), 5715 states have internal predecessors, (20255), 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 20:37:02,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5716 states to 5716 states and 20255 transitions. [2023-11-23 20:37:02,731 INFO L78 Accepts]: Start accepts. Automaton has 5716 states and 20255 transitions. Word has length 10 [2023-11-23 20:37:02,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:02,732 INFO L495 AbstractCegarLoop]: Abstraction has 5716 states and 20255 transitions. [2023-11-23 20:37:02,732 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 20:37:02,732 INFO L276 IsEmpty]: Start isEmpty. Operand 5716 states and 20255 transitions. [2023-11-23 20:37:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:37:02,733 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:02,733 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-23 20:37:02,736 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/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)] Ended with exit code 0 [2023-11-23 20:37:02,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:37:02,937 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2023-11-23 20:37:02,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:02,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1340589589, now seen corresponding path program 2 times [2023-11-23 20:37:02,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:02,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [193306797] [2023-11-23 20:37:02,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 20:37:02,938 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 20:37:02,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:02,939 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 20:37:02,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-23 20:37:03,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 20:37:03,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:37:03,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:37:03,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:03,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 6 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-11-23 20:37:03,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,121 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 20:37:03,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,151 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 20:37:03,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,165 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 20:37:03,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,193 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 20:37:03,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,207 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 20:37:03,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,222 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 20:37:03,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,231 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 20:37:03,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,245 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 20:37:03,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,269 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 20:37:03,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:37:03,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,292 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 20:37:03,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,322 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 20:37:03,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,335 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 20:37:03,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,349 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 20:37:03,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,358 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 20:37:03,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,371 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 20:37:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,380 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 20:37:03,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,395 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 20:37:03,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,404 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 20:37:03,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,433 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 20:37:03,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,448 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 20:37:03,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,457 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 20:37:03,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:03,467 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 20:37:03,824 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 20:37:03,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:37:04,645 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 20:37:04,645 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [193306797] [2023-11-23 20:37:04,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [193306797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:37:04,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [503353841] [2023-11-23 20:37:04,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 20:37:04,646 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:37:04,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:37:04,647 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:37:04,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0171d6f2-3fdd-4787-bc3e-0628d999e6ce/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-11-23 20:37:04,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 20:37:04,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:37:04,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 20:37:04,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:04,918 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 20:37:04,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,950 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 20:37:04,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,964 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 20:37:04,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,974 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 20:37:05,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,062 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 20:37:05,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,070 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 20:37:05,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,100 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 20:37:05,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,113 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 20:37:05,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,122 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 20:37:05,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,135 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