./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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_88311f41-5c01-482f-9275-900a8f70224e/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 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:24,144 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:24,269 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-23 20:36:24,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:24,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:24,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:24,324 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:24,324 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:24,325 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:24,330 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:24,331 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:24,332 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:24,332 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:24,334 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:36:24,335 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:24,335 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:24,336 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:36:24,336 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:36:24,337 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:24,337 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:36:24,338 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:36:24,338 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:36:24,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:36:24,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:36:24,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:24,341 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:24,341 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:24,342 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:24,350 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:24,351 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:36:24,352 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:36:24,353 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:36:24,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:24,353 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:36:24,353 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:36:24,354 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:24,354 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:24,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:24,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:24,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:24,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:24,356 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:24,356 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:24,356 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:36:24,357 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:36:24,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:24,358 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:24,358 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:24,358 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_88311f41-5c01-482f-9275-900a8f70224e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2023-11-23 20:36:24,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:24,733 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:24,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:24,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:24,740 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:24,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2023-11-23 20:36:28,014 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:28,322 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:28,323 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2023-11-23 20:36:28,337 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data/4e11c8c35/43797efbfa8041afaeb8eb13016dcebc/FLAG7162c0938 [2023-11-23 20:36:28,357 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data/4e11c8c35/43797efbfa8041afaeb8eb13016dcebc [2023-11-23 20:36:28,365 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:28,367 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:28,373 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:28,373 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:28,380 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:28,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b958c3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28, skipping insertion in model container [2023-11-23 20:36:28,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:28" (1/1) ... [2023-11-23 20:36:28,430 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:28,758 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:28,779 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 20:36:28,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@731d55b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:28, skipping insertion in model container [2023-11-23 20:36:28,784 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:28,784 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-23 20:36:28,787 INFO L158 Benchmark]: Toolchain (without parser) took 418.74ms. Allocated memory is still 176.2MB. Free memory was 128.8MB in the beginning and 118.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:28,788 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 176.2MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 20:36:28,789 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.91ms. Allocated memory is still 176.2MB. Free memory was 128.8MB in the beginning and 118.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 20:36:28,790 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 176.2MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.91ms. Allocated memory is still 176.2MB. Free memory was 128.8MB in the beginning and 118.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 117]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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_88311f41-5c01-482f-9275-900a8f70224e/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 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:36:31,687 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:36:31,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2023-11-23 20:36:31,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:36:31,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:36:31,918 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:36:31,919 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:36:31,920 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:36:31,921 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:36:31,930 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:36:31,930 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:36:31,931 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:36:31,932 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:36:31,934 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:36:31,934 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:36:31,935 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:36:31,936 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:36:31,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:36:31,938 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:36:31,939 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:36:31,940 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:36:31,941 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:36:31,941 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:36:31,942 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 20:36:31,942 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 20:36:31,943 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 20:36:31,943 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:36:31,944 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 20:36:31,944 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-23 20:36:31,945 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-23 20:36:31,947 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:36:31,947 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:36:31,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:36:31,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:36:31,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-23 20:36:31,948 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:36:31,950 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:36:31,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:31,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:36:31,951 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:36:31,952 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-11-23 20:36:31,952 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-23 20:36:31,952 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:36:31,953 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:36:31,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:36:31,953 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_88311f41-5c01-482f-9275-900a8f70224e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5bb11505151393f96d52a572beff0352326876d897656a8082ae272a8f39e0b4 [2023-11-23 20:36:32,413 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:36:32,443 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:36:32,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:36:32,448 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:36:32,449 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:36:32,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2023-11-23 20:36:35,951 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:36:36,236 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:36:36,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/sv-benchmarks/c/weaver/chl-array-int-trans.wvr.c [2023-11-23 20:36:36,248 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data/09e912bd6/02b5dd6ca0344dc28dbe61630ab1e1b3/FLAGf1da442e3 [2023-11-23 20:36:36,272 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/data/09e912bd6/02b5dd6ca0344dc28dbe61630ab1e1b3 [2023-11-23 20:36:36,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:36:36,283 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:36:36,285 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:36,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:36:36,293 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:36:36,294 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:36,295 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670f8b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36, skipping insertion in model container [2023-11-23 20:36:36,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:36,343 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:36,680 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:36,717 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-23 20:36:36,731 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:36:36,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:36,763 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:36:36,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:36:36,862 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:36:36,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36 WrapperNode [2023-11-23 20:36:36,863 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:36:36,864 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:36,866 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:36:36,866 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:36:36,877 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:36,910 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,007 INFO L138 Inliner]: procedures = 28, calls = 50, calls flagged for inlining = 14, calls inlined = 22, statements flattened = 281 [2023-11-23 20:36:37,007 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:36:37,008 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:36:37,008 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:36:37,009 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:36:37,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,054 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,054 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,084 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,088 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,094 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:36:37,095 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:36:37,096 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:36:37,096 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:36:37,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (1/1) ... [2023-11-23 20:36:37,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:36:37,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:37,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:36:37,176 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:36:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:36:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 20:36:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:36:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2023-11-23 20:36:37,205 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-23 20:36:37,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-23 20:36:37,206 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-23 20:36:37,206 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-23 20:36:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-23 20:36:37,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-23 20:36:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:36:37,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:36:37,207 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:36:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:36:37,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2023-11-23 20:36:37,212 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 20:36:37,387 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:36:37,394 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:36:38,618 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:36:39,225 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:36:39,225 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 20:36:39,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:39 BoogieIcfgContainer [2023-11-23 20:36:39,226 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:36:39,228 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:36:39,229 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:36:39,232 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:36:39,232 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:36:36" (1/3) ... [2023-11-23 20:36:39,233 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f93e698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:39, skipping insertion in model container [2023-11-23 20:36:39,233 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:36:36" (2/3) ... [2023-11-23 20:36:39,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f93e698 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:36:39, skipping insertion in model container [2023-11-23 20:36:39,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:36:39" (3/3) ... [2023-11-23 20:36:39,236 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-array-int-trans.wvr.c [2023-11-23 20:36:39,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:36:39,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-23 20:36:39,257 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-23 20:36:39,393 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-23 20:36:39,442 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 108 places, 107 transitions, 235 flow [2023-11-23 20:36:41,206 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 27647 states, 25091 states have (on average 4.267147582798613) internal successors, (107067), 27646 states have internal predecessors, (107067), 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 20:36:41,233 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:36:41,243 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;@1441e45f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:36:41,243 INFO L358 AbstractCegarLoop]: Starting to check reachability of 71 error locations. [2023-11-23 20:36:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand has 27647 states, 25091 states have (on average 4.267147582798613) internal successors, (107067), 27646 states have internal predecessors, (107067), 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 20:36:41,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 20:36:41,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:41,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 20:36:41,459 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:36:41,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash 861703, now seen corresponding path program 1 times [2023-11-23 20:36:41,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:41,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [227043290] [2023-11-23 20:36:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:41,487 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 20:36:41,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:41,490 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:41,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:41,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 20:36:41,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:41,877 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 20:36:41,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:41,897 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 20:36:41,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:41,918 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 20:36:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:41,939 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 20:36:41,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:41,967 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 20:36:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:41,975 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 20:36:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:41,999 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 20:36:42,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,009 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 20:36:42,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,028 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 11 treesize of output 1 [2023-11-23 20:36:42,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,048 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 20:36:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,059 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 11 treesize of output 1 [2023-11-23 20:36:42,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,066 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 20:36:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,101 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 20:36:42,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,118 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 20:36:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-11-23 20:36:42,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,172 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 20:36:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,207 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 20:36:42,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,256 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 20:36:42,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,286 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 20:36:42,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,296 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 20:36:42,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,307 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 20:36:42,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,314 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 20:36:42,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,326 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 20:36:42,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:42,333 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 20:36:42,343 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 20:36:42,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:42,344 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:42,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [227043290] [2023-11-23 20:36:42,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [227043290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:42,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:42,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 20:36:42,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498478637] [2023-11-23 20:36:42,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:42,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:36:42,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:42,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:36:42,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:36:42,446 INFO L87 Difference]: Start difference. First operand has 27647 states, 25091 states have (on average 4.267147582798613) internal successors, (107067), 27646 states have internal predecessors, (107067), 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 20:36:43,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:43,419 INFO L93 Difference]: Finished difference Result 27642 states and 107062 transitions. [2023-11-23 20:36:43,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:36:43,422 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 20:36:43,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:43,832 INFO L225 Difference]: With dead ends: 27642 [2023-11-23 20:36:43,833 INFO L226 Difference]: Without dead ends: 27642 [2023-11-23 20:36:43,834 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 20:36:43,839 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 8 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:43,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:36:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27642 states. [2023-11-23 20:36:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27642 to 27642. [2023-11-23 20:36:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27642 states, 25090 states have (on average 4.267118373854125) internal successors, (107062), 27641 states have internal predecessors, (107062), 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 20:36:46,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27642 states to 27642 states and 107062 transitions. [2023-11-23 20:36:46,440 INFO L78 Accepts]: Start accepts. Automaton has 27642 states and 107062 transitions. Word has length 3 [2023-11-23 20:36:46,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:46,441 INFO L495 AbstractCegarLoop]: Abstraction has 27642 states and 107062 transitions. [2023-11-23 20:36:46,441 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 20:36:46,442 INFO L276 IsEmpty]: Start isEmpty. Operand 27642 states and 107062 transitions. [2023-11-23 20:36:46,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 20:36:46,443 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:46,443 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 20:36:46,449 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2023-11-23 20:36:46,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:46,646 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:36:46,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:46,647 INFO L85 PathProgramCache]: Analyzing trace with hash 861704, now seen corresponding path program 1 times [2023-11-23 20:36:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:46,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451340890] [2023-11-23 20:36:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:46,649 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 20:36:46,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:46,652 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:46,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:46,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:46,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:46,979 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 20:36:46,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:46,993 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 20:36:47,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,022 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 20:36:47,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,036 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 20:36:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,053 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 13 treesize of output 1 [2023-11-23 20:36:47,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,062 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 20:36:47,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,081 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 20:36:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,090 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 20:36:47,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,118 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 20:36:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,132 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 20:36:47,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,146 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 20:36:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,154 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 20:36:47,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,183 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 20:36:47,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,195 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 20:36:47,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,220 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 20:36:47,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,233 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 20:36:47,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,272 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 20:36:47,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,295 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 20:36:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,323 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 20:36:47,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,335 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 20:36:47,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,349 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 20:36:47,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,357 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 20:36:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,370 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 20:36:47,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:47,378 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 20:36:47,456 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 20:36:47,457 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:36:47,457 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:47,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451340890] [2023-11-23 20:36:47,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451340890] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:36:47,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:36:47,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:36:47,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201717809] [2023-11-23 20:36:47,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:36:47,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:36:47,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:47,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:36:47,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:36:47,460 INFO L87 Difference]: Start difference. First operand 27642 states and 107062 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 20:36:48,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:48,536 INFO L93 Difference]: Finished difference Result 27648 states and 107071 transitions. [2023-11-23 20:36:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:36:48,537 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 20:36:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:49,023 INFO L225 Difference]: With dead ends: 27648 [2023-11-23 20:36:49,023 INFO L226 Difference]: Without dead ends: 27648 [2023-11-23 20:36:49,024 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 20:36:49,025 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 3 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:49,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 20:36:49,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27648 states. [2023-11-23 20:36:50,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27648 to 27648. [2023-11-23 20:36:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27648 states, 25096 states have (on average 4.266456805865476) internal successors, (107071), 27647 states have internal predecessors, (107071), 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 20:36:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27648 states to 27648 states and 107071 transitions. [2023-11-23 20:36:50,728 INFO L78 Accepts]: Start accepts. Automaton has 27648 states and 107071 transitions. Word has length 3 [2023-11-23 20:36:50,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:50,728 INFO L495 AbstractCegarLoop]: Abstraction has 27648 states and 107071 transitions. [2023-11-23 20:36:50,729 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 20:36:50,729 INFO L276 IsEmpty]: Start isEmpty. Operand 27648 states and 107071 transitions. [2023-11-23 20:36:50,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:36:50,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:50,730 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-23 20:36:50,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:50,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:36:50,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash 828127022, now seen corresponding path program 1 times [2023-11-23 20:36:50,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:36:50,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1855008137] [2023-11-23 20:36:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:50,935 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 20:36:50,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:36:50,942 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:50,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:36:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:51,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 20:36:51,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:51,092 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 20:36:51,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,112 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 20:36:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,143 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 20:36:51,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,444 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 20:36:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,492 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 20:36:51,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,525 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 20:36:51,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,539 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 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:36:51,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,553 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 20:36:51,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,570 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 20:36:51,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,580 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 20:36:51,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,612 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 20:36:51,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,631 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 20:36:51,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,652 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 20:36:51,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,679 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 20:36:51,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,695 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 20:36:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,707 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 20:36:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,724 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 20:36:51,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,738 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 20:36:51,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,771 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 20:36:51,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,785 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 20:36:51,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,802 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 20:36:51,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,814 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 20:36:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,835 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 20:36:51,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:51,852 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 20:36:52,072 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 20:36:52,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:52,605 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 20:36:52,606 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:36:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1855008137] [2023-11-23 20:36:52,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1855008137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:52,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1817629479] [2023-11-23 20:36:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:52,606 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 20:36:52,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 20:36:52,610 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 20:36:52,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2023-11-23 20:36:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:52,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:36:52,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:52,864 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 20:36:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:52,886 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 20:36:52,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:52,901 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 20:36:52,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:52,913 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 20:36:52,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:52,928 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 20:36:52,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:52,947 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 20:36:52,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:52,988 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 20:36:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,031 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 20:36:53,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,062 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 20:36:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,078 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 13 treesize of output 1 [2023-11-23 20:36:53,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,108 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 20:36:53,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,124 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 20:36:53,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,142 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 20:36:53,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,156 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 20:36:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,172 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 20:36:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,182 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 20:36:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-23 20:36:53,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,236 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 20:36:53,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,269 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 20:36:53,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,284 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 20:36:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,297 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 20:36:53,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,311 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 20:36:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,333 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 20:36:53,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,342 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 20:36:53,434 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 20:36:53,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:53,593 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 20:36:53,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1817629479] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820913327] [2023-11-23 20:36:53,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:53,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:53,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:53,597 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:53,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:36:53,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:53,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:36:53,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:53,760 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 20:36:53,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,779 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 20:36:53,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,937 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 20:36:53,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,948 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 20:36:53,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:53,966 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 20:36:53,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,000 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 20:36:54,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,027 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 20:36:54,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,038 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 20:36:54,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,051 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 20:36:54,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,067 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 20:36:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,101 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 20:36:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,117 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 20:36:54,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,141 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 20:36:54,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,154 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 20:36:54,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,172 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 20:36:54,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,188 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 20:36:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,221 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 20:36:54,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,236 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 20:36:54,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,260 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 20:36:54,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,287 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 20:36:54,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,324 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 20:36:54,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,341 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 20:36:54,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,376 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 20:36:54,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:54,424 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 20:36:54,553 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 20:36:54,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:54,706 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 20:36:54,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820913327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:54,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 20:36:54,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 3, 3] total 9 [2023-11-23 20:36:54,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725827533] [2023-11-23 20:36:54,707 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:54,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-23 20:36:54,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:36:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-23 20:36:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-23 20:36:54,710 INFO L87 Difference]: Start difference. First operand 27648 states and 107071 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 20:36:59,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:59,326 INFO L93 Difference]: Finished difference Result 27666 states and 107098 transitions. [2023-11-23 20:36:59,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:36:59,327 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 20:36:59,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:59,558 INFO L225 Difference]: With dead ends: 27666 [2023-11-23 20:36:59,558 INFO L226 Difference]: Without dead ends: 27666 [2023-11-23 20:36:59,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-23 20:36:59,560 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 7 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:59,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 228 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-23 20:36:59,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27666 states. [2023-11-23 20:37:00,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27666 to 27666. [2023-11-23 20:37:00,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27666 states, 25114 states have (on average 4.264473998566537) internal successors, (107098), 27665 states have internal predecessors, (107098), 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 20:37:01,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27666 states to 27666 states and 107098 transitions. [2023-11-23 20:37:01,458 INFO L78 Accepts]: Start accepts. Automaton has 27666 states and 107098 transitions. Word has length 5 [2023-11-23 20:37:01,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:01,459 INFO L495 AbstractCegarLoop]: Abstraction has 27666 states and 107098 transitions. [2023-11-23 20:37:01,459 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 20:37:01,460 INFO L276 IsEmpty]: Start isEmpty. Operand 27666 states and 107098 transitions. [2023-11-23 20:37:01,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:37:01,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:01,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 20:37:01,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:01,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:01,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:02,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:37:02,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:37:02,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 828161424, now seen corresponding path program 1 times [2023-11-23 20:37:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:02,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [595510155] [2023-11-23 20:37:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:02,065 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 20:37:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:02,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:02,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2023-11-23 20:37:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:02,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-23 20:37:02,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:02,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,328 INFO L349 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2023-11-23 20:37:02,328 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 20:37:02,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,407 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:37:02,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 20:37:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,462 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:37:02,462 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 20:37:02,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,497 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 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 20:37:02,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,559 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:37:02,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 1 [2023-11-23 20:37:02,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,593 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 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 20:37:02,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:02,631 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 13 [2023-11-23 20:37:02,697 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:37:02,697 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 20:37:02,733 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 20:37:02,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:02,734 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:02,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [595510155] [2023-11-23 20:37:02,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [595510155] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:02,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:02,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:02,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287979403] [2023-11-23 20:37:02,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:02,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:02,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:37:02,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:02,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:02,736 INFO L87 Difference]: Start difference. First operand 27666 states and 107098 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:03,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:03,196 INFO L93 Difference]: Finished difference Result 22752 states and 86578 transitions. [2023-11-23 20:37:03,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:03,197 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 20:37:03,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:03,298 INFO L225 Difference]: With dead ends: 22752 [2023-11-23 20:37:03,298 INFO L226 Difference]: Without dead ends: 22752 [2023-11-23 20:37:03,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 20:37:03,300 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 93 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:03,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 25 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:37:03,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22752 states. [2023-11-23 20:37:04,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22752 to 22752. [2023-11-23 20:37:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22752 states, 20930 states have (on average 4.1365504061156235) internal successors, (86578), 22751 states have internal predecessors, (86578), 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 20:37:04,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22752 states to 22752 states and 86578 transitions. [2023-11-23 20:37:04,341 INFO L78 Accepts]: Start accepts. Automaton has 22752 states and 86578 transitions. Word has length 5 [2023-11-23 20:37:04,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:04,341 INFO L495 AbstractCegarLoop]: Abstraction has 22752 states and 86578 transitions. [2023-11-23 20:37:04,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:04,341 INFO L276 IsEmpty]: Start isEmpty. Operand 22752 states and 86578 transitions. [2023-11-23 20:37:04,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:37:04,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:04,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 20:37:04,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:04,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:04,545 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:37:04,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:04,545 INFO L85 PathProgramCache]: Analyzing trace with hash 828161425, now seen corresponding path program 1 times [2023-11-23 20:37:04,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:04,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141713546] [2023-11-23 20:37:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:04,546 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 20:37:04,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:04,547 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:04,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2023-11-23 20:37:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:04,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-23 20:37:04,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:04,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,774 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 21 treesize of output 5 [2023-11-23 20:37:04,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2023-11-23 20:37:04,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,840 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 20:37:04,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,875 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 20:37:04,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:04,911 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 20:37:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:05,254 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 20:37:05,345 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 20:37:05,346 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:05,346 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141713546] [2023-11-23 20:37:05,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141713546] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:05,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:05,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709858254] [2023-11-23 20:37:05,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:37:05,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:05,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:05,349 INFO L87 Difference]: Start difference. First operand 22752 states and 86578 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:05,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:05,992 INFO L93 Difference]: Finished difference Result 17838 states and 66058 transitions. [2023-11-23 20:37:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:05,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 20:37:05,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:06,117 INFO L225 Difference]: With dead ends: 17838 [2023-11-23 20:37:06,118 INFO L226 Difference]: Without dead ends: 17838 [2023-11-23 20:37:06,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:06,120 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 181 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:06,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 22 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17838 states. [2023-11-23 20:37:06,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17838 to 17838. [2023-11-23 20:37:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17838 states, 16746 states have (on average 3.944703212707512) internal successors, (66058), 17837 states have internal predecessors, (66058), 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 20:37:06,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17838 states to 17838 states and 66058 transitions. [2023-11-23 20:37:06,961 INFO L78 Accepts]: Start accepts. Automaton has 17838 states and 66058 transitions. Word has length 5 [2023-11-23 20:37:06,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:06,961 INFO L495 AbstractCegarLoop]: Abstraction has 17838 states and 66058 transitions. [2023-11-23 20:37:06,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:37:06,961 INFO L276 IsEmpty]: Start isEmpty. Operand 17838 states and 66058 transitions. [2023-11-23 20:37:06,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:37:06,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:06,962 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:06,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:37:07,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:07,163 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:37:07,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:07,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1465761783, now seen corresponding path program 1 times [2023-11-23 20:37:07,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:07,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2144425685] [2023-11-23 20:37:07,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:07,165 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 20:37:07,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:07,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:07,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:07,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:07,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-23 20:37:07,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,415 INFO L349 Elim1Store]: treesize reduction 19, result has 26.9 percent of original size [2023-11-23 20:37:07,416 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 20:37:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,463 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 15 treesize of output 1 [2023-11-23 20:37:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,896 INFO L224 Elim1Store]: Index analysis took 417 ms [2023-11-23 20:37:07,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,925 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:37:07,926 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 20:37:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,959 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 0 case distinctions, treesize of input 17 treesize of output 1 [2023-11-23 20:37:07,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:07,999 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 15 treesize of output 1 [2023-11-23 20:37:08,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,054 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:37:08,055 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 20:37:08,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-11-23 20:37:08,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,203 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-23 20:37:08,203 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 20:37:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:08,264 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 13 [2023-11-23 20:37:08,342 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2023-11-23 20:37:08,342 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 20:37:08,442 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 20:37:08,443 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:08,443 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:08,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2144425685] [2023-11-23 20:37:08,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2144425685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:08,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:08,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:08,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115794622] [2023-11-23 20:37:08,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:08,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:08,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:37:08,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:08,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:08,446 INFO L87 Difference]: Start difference. First operand 17838 states and 66058 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 20:37:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:08,974 INFO L93 Difference]: Finished difference Result 17532 states and 65122 transitions. [2023-11-23 20:37:08,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:08,975 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 20:37:08,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:09,073 INFO L225 Difference]: With dead ends: 17532 [2023-11-23 20:37:09,073 INFO L226 Difference]: Without dead ends: 17532 [2023-11-23 20:37:09,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:09,074 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:09,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 23 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17532 states. [2023-11-23 20:37:09,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17532 to 17532. [2023-11-23 20:37:09,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17532 states, 16530 states have (on average 3.9396249243799155) internal successors, (65122), 17531 states have internal predecessors, (65122), 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 20:37:10,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17532 states to 17532 states and 65122 transitions. [2023-11-23 20:37:10,108 INFO L78 Accepts]: Start accepts. Automaton has 17532 states and 65122 transitions. Word has length 8 [2023-11-23 20:37:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:10,109 INFO L495 AbstractCegarLoop]: Abstraction has 17532 states and 65122 transitions. [2023-11-23 20:37:10,109 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 20:37:10,109 INFO L276 IsEmpty]: Start isEmpty. Operand 17532 states and 65122 transitions. [2023-11-23 20:37:10,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:37:10,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:10,110 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:10,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:10,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:10,314 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:37:10,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:10,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1465761784, now seen corresponding path program 1 times [2023-11-23 20:37:10,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:10,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1773158374] [2023-11-23 20:37:10,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:10,315 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 20:37:10,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:10,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:10,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:10,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 20:37:10,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:10,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,514 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 20:37:10,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,547 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:37:10,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,581 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 20:37:10,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,597 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 20:37:10,620 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:37:10,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:37:10,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,680 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 20:37:10,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,701 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 20:37:10,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,735 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 20:37:10,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,768 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 20:37:10,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:37:10,802 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 20:37:10,903 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 20:37:10,903 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:10,904 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:10,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1773158374] [2023-11-23 20:37:10,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1773158374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:10,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:10,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:37:10,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600154830] [2023-11-23 20:37:10,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:10,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:37:10,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:37:10,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:37:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:37:10,906 INFO L87 Difference]: Start difference. First operand 17532 states and 65122 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 20:37:11,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:11,421 INFO L93 Difference]: Finished difference Result 17226 states and 64186 transitions. [2023-11-23 20:37:11,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:37:11,422 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 20:37:11,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:11,499 INFO L225 Difference]: With dead ends: 17226 [2023-11-23 20:37:11,500 INFO L226 Difference]: Without dead ends: 17226 [2023-11-23 20:37:11,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 20:37:11,501 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 87 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:11,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 20 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:37:11,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2023-11-23 20:37:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 17226. [2023-11-23 20:37:11,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17226 states, 16314 states have (on average 3.9344121613338237) internal successors, (64186), 17225 states have internal predecessors, (64186), 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 20:37:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17226 states to 17226 states and 64186 transitions. [2023-11-23 20:37:12,372 INFO L78 Accepts]: Start accepts. Automaton has 17226 states and 64186 transitions. Word has length 8 [2023-11-23 20:37:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:37:12,372 INFO L495 AbstractCegarLoop]: Abstraction has 17226 states and 64186 transitions. [2023-11-23 20:37:12,373 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 20:37:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17226 states and 64186 transitions. [2023-11-23 20:37:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:37:12,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:37:12,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:37:12,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:12,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:12,574 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 68 more)] === [2023-11-23 20:37:12,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:37:12,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1805929701, now seen corresponding path program 1 times [2023-11-23 20:37:12,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 20:37:12,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1901510092] [2023-11-23 20:37:12,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:37:12,575 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 20:37:12,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 20:37:12,576 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:12,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88311f41-5c01-482f-9275-900a8f70224e/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 20:37:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:37:12,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 20:37:12,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:37:12,804 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 20:37:12,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:37:12,804 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 20:37:12,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1901510092] [2023-11-23 20:37:12,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1901510092] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:37:12,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:37:12,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:37:12,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959044466] [2023-11-23 20:37:12,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:37:12,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:37:12,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 20:37:12,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:37:12,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:12,806 INFO L87 Difference]: Start difference. First operand 17226 states and 64186 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 20:37:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:37:13,511 INFO L93 Difference]: Finished difference Result 22025 states and 80334 transitions. [2023-11-23 20:37:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:37:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2023-11-23 20:37:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:37:13,607 INFO L225 Difference]: With dead ends: 22025 [2023-11-23 20:37:13,607 INFO L226 Difference]: Without dead ends: 22025 [2023-11-23 20:37:13,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:37:13,608 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 112 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:37:13,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 247 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time]