./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:57:19,072 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:57:19,139 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-28 23:57:19,144 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:57:19,145 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:57:19,172 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:57:19,173 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:57:19,174 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:57:19,174 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:57:19,175 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:57:19,175 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:57:19,176 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:57:19,177 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:57:19,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:57:19,178 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:57:19,179 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:57:19,179 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:57:19,180 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:57:19,180 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:57:19,181 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:57:19,182 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 23:57:19,185 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 23:57:19,186 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 23:57:19,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:57:19,186 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 23:57:19,187 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:57:19,187 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:57:19,187 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:57:19,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:57:19,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:57:19,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:57:19,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:57:19,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:57:19,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:57:19,191 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:57:19,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 23:57:19,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 23:57:19,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:57:19,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:57:19,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:57:19,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:57:19,192 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2023-11-28 23:57:19,420 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:57:19,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:57:19,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:57:19,454 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:57:19,455 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:57:19,456 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2023-11-28 23:57:22,326 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:57:22,602 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:57:22,603 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2023-11-28 23:57:22,619 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data/9d00418f9/54080e78b9a346ce9fe9fd966803cf6e/FLAG2ed416759 [2023-11-28 23:57:22,922 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data/9d00418f9/54080e78b9a346ce9fe9fd966803cf6e [2023-11-28 23:57:22,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:57:22,926 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:57:22,928 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:57:22,928 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:57:22,934 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:57:22,935 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:22" (1/1) ... [2023-11-28 23:57:22,936 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9789a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:22, skipping insertion in model container [2023-11-28 23:57:22,936 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:22" (1/1) ... [2023-11-28 23:57:22,987 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:57:23,275 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:57:23,290 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) [2023-11-28 23:57:23,290 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5ae1043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:23, skipping insertion in model container [2023-11-28 23:57:23,291 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:57:23,291 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2023-11-28 23:57:23,293 INFO L158 Benchmark]: Toolchain (without parser) took 366.18ms. Allocated memory is still 180.4MB. Free memory was 141.4MB in the beginning and 129.7MB in the end (delta: 11.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-28 23:57:23,294 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 180.4MB. Free memory is still 152.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 23:57:23,295 INFO L158 Benchmark]: CACSL2BoogieTranslator took 363.38ms. Allocated memory is still 180.4MB. Free memory was 141.0MB in the beginning and 129.7MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-28 23:57:23,297 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 180.4MB. Free memory is still 152.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 363.38ms. Allocated memory is still 180.4MB. Free memory was 141.0MB in the beginning and 129.7MB in the end (delta: 11.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 530]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 23:57:25,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 23:57:25,367 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-28 23:57:25,374 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 23:57:25,375 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 23:57:25,405 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 23:57:25,406 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 23:57:25,407 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 23:57:25,408 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 23:57:25,408 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 23:57:25,409 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 23:57:25,409 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 23:57:25,410 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 23:57:25,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 23:57:25,411 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 23:57:25,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 23:57:25,413 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-28 23:57:25,413 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 23:57:25,414 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-28 23:57:25,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 23:57:25,415 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 23:57:25,416 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 23:57:25,416 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 23:57:25,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 23:57:25,417 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 23:57:25,418 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-28 23:57:25,418 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-28 23:57:25,419 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 23:57:25,419 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-28 23:57:25,420 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 23:57:25,420 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 23:57:25,421 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 23:57:25,421 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 23:57:25,421 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 23:57:25,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:57:25,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 23:57:25,422 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 23:57:25,422 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-28 23:57:25,423 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-28 23:57:25,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 23:57:25,423 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 23:57:25,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 23:57:25,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 23:57:25,424 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-28 23:57:25,424 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71daa4447a811360729951159d42c752715aafb50c3ad4dcb2ed5d242a4f4a78 [2023-11-28 23:57:25,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 23:57:25,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 23:57:25,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 23:57:25,759 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 23:57:25,759 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 23:57:25,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2023-11-28 23:57:28,649 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 23:57:28,888 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 23:57:28,889 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/sv-benchmarks/c/array-memsafety/bubblesort-alloca-2.i [2023-11-28 23:57:28,905 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data/42bd8f034/38d85f12a733428c9de79de268d52b81/FLAG9decf6c2b [2023-11-28 23:57:28,923 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/data/42bd8f034/38d85f12a733428c9de79de268d52b81 [2023-11-28 23:57:28,926 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 23:57:28,927 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 23:57:28,929 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 23:57:28,929 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 23:57:28,936 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 23:57:28,936 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:28" (1/1) ... [2023-11-28 23:57:28,938 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f273918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:28, skipping insertion in model container [2023-11-28 23:57:28,938 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 11:57:28" (1/1) ... [2023-11-28 23:57:28,990 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:57:29,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:57:29,339 INFO L199 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2023-11-28 23:57:29,357 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 23:57:29,387 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:57:29,392 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 23:57:29,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 23:57:29,465 INFO L206 MainTranslator]: Completed translation [2023-11-28 23:57:29,466 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29 WrapperNode [2023-11-28 23:57:29,466 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 23:57:29,467 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 23:57:29,468 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 23:57:29,468 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 23:57:29,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,494 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,519 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-28 23:57:29,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 23:57:29,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 23:57:29,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 23:57:29,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 23:57:29,533 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,534 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,538 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,555 INFO L175 MemorySlicer]: Split 7 memory accesses to 1 slices as follows [7]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 3 writes are split as follows [3]. [2023-11-28 23:57:29,555 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,564 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,567 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,570 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,575 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 23:57:29,576 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 23:57:29,576 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 23:57:29,576 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 23:57:29,577 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (1/1) ... [2023-11-28 23:57:29,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 23:57:29,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 23:57:29,610 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 23:57:29,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 23:57:29,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2023-11-28 23:57:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 23:57:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 23:57:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2023-11-28 23:57:29,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 23:57:29,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 23:57:29,797 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 23:57:29,800 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 23:57:30,105 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 23:57:30,140 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 23:57:30,140 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-28 23:57:30,141 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:30 BoogieIcfgContainer [2023-11-28 23:57:30,141 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 23:57:30,144 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 23:57:30,144 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 23:57:30,148 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 23:57:30,148 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 11:57:28" (1/3) ... [2023-11-28 23:57:30,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c6ff55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:30, skipping insertion in model container [2023-11-28 23:57:30,149 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 11:57:29" (2/3) ... [2023-11-28 23:57:30,149 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39c6ff55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 11:57:30, skipping insertion in model container [2023-11-28 23:57:30,150 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 11:57:30" (3/3) ... [2023-11-28 23:57:30,151 INFO L112 eAbstractionObserver]: Analyzing ICFG bubblesort-alloca-2.i [2023-11-28 23:57:30,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 23:57:30,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-28 23:57:30,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 23:57:30,232 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=PETRI_NET, 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;@416a1ee4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 23:57:30,232 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-28 23:57:30,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 2.210526315789474) internal successors, (42), 34 states have internal predecessors, (42), 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) [2023-11-28 23:57:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 23:57:30,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:30,245 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 23:57:30,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:30,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:30,251 INFO L85 PathProgramCache]: Analyzing trace with hash 106363065, now seen corresponding path program 1 times [2023-11-28 23:57:30,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:30,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100901375] [2023-11-28 23:57:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:30,266 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 [2023-11-28 23:57:30,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:30,268 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:30,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:30,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:57:30,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:30,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-28 23:57:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:30,464 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:30,465 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:30,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100901375] [2023-11-28 23:57:30,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100901375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:30,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:30,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 23:57:30,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169688356] [2023-11-28 23:57:30,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:30,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 23:57:30,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 23:57:30,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:57:30,514 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 2.210526315789474) internal successors, (42), 34 states have internal predecessors, (42), 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 2.5) 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) [2023-11-28 23:57:30,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:30,619 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-11-28 23:57:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 23:57:30,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2023-11-28 23:57:30,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:30,628 INFO L225 Difference]: With dead ends: 34 [2023-11-28 23:57:30,628 INFO L226 Difference]: Without dead ends: 33 [2023-11-28 23:57:30,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 23:57:30,633 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:30,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:30,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-28 23:57:30,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-28 23:57:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 32 states have internal predecessors, (37), 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) [2023-11-28 23:57:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-11-28 23:57:30,664 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 5 [2023-11-28 23:57:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:30,665 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-11-28 23:57:30,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2023-11-28 23:57:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-11-28 23:57:30,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 23:57:30,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:30,666 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 23:57:30,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:30,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:30,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:30,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:30,868 INFO L85 PathProgramCache]: Analyzing trace with hash 106363066, now seen corresponding path program 1 times [2023-11-28 23:57:30,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179791599] [2023-11-28 23:57:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:30,869 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 [2023-11-28 23:57:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:30,870 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:30,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:30,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-28 23:57:30,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:30,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-28 23:57:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:31,005 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:31,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:31,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179791599] [2023-11-28 23:57:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179791599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:31,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:31,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:31,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262076015] [2023-11-28 23:57:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:31,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:31,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:31,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:31,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:31,010 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2023-11-28 23:57:31,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:31,303 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-11-28 23:57:31,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:57:31,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 [2023-11-28 23:57:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:31,305 INFO L225 Difference]: With dead ends: 66 [2023-11-28 23:57:31,305 INFO L226 Difference]: Without dead ends: 66 [2023-11-28 23:57:31,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:31,307 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 36 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:31,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 119 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:57:31,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-28 23:57:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 36. [2023-11-28 23:57:31,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 35 states have internal predecessors, (40), 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) [2023-11-28 23:57:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-28 23:57:31,320 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 5 [2023-11-28 23:57:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:31,321 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-28 23:57:31,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2023-11-28 23:57:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-28 23:57:31,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 23:57:31,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:31,322 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 23:57:31,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2023-11-28 23:57:31,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:31,524 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:31,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:31,525 INFO L85 PathProgramCache]: Analyzing trace with hash 106422648, now seen corresponding path program 1 times [2023-11-28 23:57:31,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:31,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141324630] [2023-11-28 23:57:31,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:31,526 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 [2023-11-28 23:57:31,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:31,527 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:31,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:31,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:31,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 23:57:31,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:31,650 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 [2023-11-28 23:57:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:31,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:31,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141324630] [2023-11-28 23:57:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141324630] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:31,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:31,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190133901] [2023-11-28 23:57:31,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:31,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:31,747 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2023-11-28 23:57:31,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:31,989 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-11-28 23:57:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:57:31,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 [2023-11-28 23:57:31,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:31,991 INFO L225 Difference]: With dead ends: 38 [2023-11-28 23:57:31,991 INFO L226 Difference]: Without dead ends: 38 [2023-11-28 23:57:31,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:31,993 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 36 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:31,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:57:31,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-28 23:57:31,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-11-28 23:57:31,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 34 states have internal predecessors, (39), 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) [2023-11-28 23:57:31,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-28 23:57:31,999 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 5 [2023-11-28 23:57:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:31,999 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-28 23:57:31,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2023-11-28 23:57:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-28 23:57:32,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 23:57:32,000 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:32,000 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-28 23:57:32,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2023-11-28 23:57:32,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:32,201 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:32,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:32,201 INFO L85 PathProgramCache]: Analyzing trace with hash -864243744, now seen corresponding path program 1 times [2023-11-28 23:57:32,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:32,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680850499] [2023-11-28 23:57:32,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:32,202 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:32,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:32,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:32,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2023-11-28 23:57:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:32,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-28 23:57:32,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:32,302 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:32,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:32,370 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:32,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680850499] [2023-11-28 23:57:32,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680850499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:32,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:32,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-28 23:57:32,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887525837] [2023-11-28 23:57:32,371 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:32,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:57:32,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:32,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:57:32,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:57:32,373 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2023-11-28 23:57:32,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:32,529 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2023-11-28 23:57:32,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:57:32,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 23:57:32,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:32,532 INFO L225 Difference]: With dead ends: 66 [2023-11-28 23:57:32,532 INFO L226 Difference]: Without dead ends: 66 [2023-11-28 23:57:32,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:57:32,534 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 30 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:32,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 187 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:32,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-28 23:57:32,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 39. [2023-11-28 23:57:32,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.72) internal successors, (43), 38 states have internal predecessors, (43), 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) [2023-11-28 23:57:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-11-28 23:57:32,540 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 7 [2023-11-28 23:57:32,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:32,540 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-11-28 23:57:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2023-11-28 23:57:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-11-28 23:57:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 23:57:32,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:32,541 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-28 23:57:32,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2023-11-28 23:57:32,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:32,744 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:32,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:32,744 INFO L85 PathProgramCache]: Analyzing trace with hash -806985442, now seen corresponding path program 1 times [2023-11-28 23:57:32,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:32,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1964380727] [2023-11-28 23:57:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:32,745 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 [2023-11-28 23:57:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:32,746 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:32,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-28 23:57:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:32,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-28 23:57:32,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:32,829 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 [2023-11-28 23:57:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:33,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:33,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:33,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1964380727] [2023-11-28 23:57:33,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1964380727] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:33,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:33,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2023-11-28 23:57:33,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331997211] [2023-11-28 23:57:33,382 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:33,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-28 23:57:33,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:33,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-28 23:57:33,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:57:33,384 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:34,285 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2023-11-28 23:57:34,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:57:34,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-28 23:57:34,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:34,288 INFO L225 Difference]: With dead ends: 47 [2023-11-28 23:57:34,289 INFO L226 Difference]: Without dead ends: 47 [2023-11-28 23:57:34,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2023-11-28 23:57:34,290 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:34,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 79 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:57:34,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-28 23:57:34,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-11-28 23:57:34,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 44 states have internal predecessors, (52), 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) [2023-11-28 23:57:34,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2023-11-28 23:57:34,297 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 7 [2023-11-28 23:57:34,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:34,298 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2023-11-28 23:57:34,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:34,298 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2023-11-28 23:57:34,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 23:57:34,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:34,299 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:34,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:34,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:34,500 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:34,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:34,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1641957722, now seen corresponding path program 1 times [2023-11-28 23:57:34,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:34,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1427538860] [2023-11-28 23:57:34,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:34,501 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 [2023-11-28 23:57:34,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:34,502 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:34,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:34,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:34,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-28 23:57:34,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:34,567 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:34,568 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:34,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1427538860] [2023-11-28 23:57:34,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1427538860] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:34,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:34,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:57:34,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726022786] [2023-11-28 23:57:34,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:34,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:34,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:34,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:34,570 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:34,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:34,688 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2023-11-28 23:57:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:57:34,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-28 23:57:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:34,691 INFO L225 Difference]: With dead ends: 95 [2023-11-28 23:57:34,691 INFO L226 Difference]: Without dead ends: 95 [2023-11-28 23:57:34,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:34,692 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:34,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 98 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-28 23:57:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 47. [2023-11-28 23:57:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 46 states have internal predecessors, (54), 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) [2023-11-28 23:57:34,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-11-28 23:57:34,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 10 [2023-11-28 23:57:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:34,699 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-11-28 23:57:34,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-28 23:57:34,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-11-28 23:57:34,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 23:57:34,701 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:34,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:34,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-28 23:57:34,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:34,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:34,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:34,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1641958524, now seen corresponding path program 1 times [2023-11-28 23:57:34,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:34,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [820225240] [2023-11-28 23:57:34,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:34,903 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 [2023-11-28 23:57:34,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:34,904 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:34,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:34,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:34,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:57:34,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:34,987 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:34,987 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:34,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [820225240] [2023-11-28 23:57:34,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [820225240] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:34,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:34,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 23:57:34,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81391822] [2023-11-28 23:57:34,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:34,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:57:34,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:34,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:57:34,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:34,989 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:35,106 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2023-11-28 23:57:35,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:57:35,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-28 23:57:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:35,108 INFO L225 Difference]: With dead ends: 75 [2023-11-28 23:57:35,109 INFO L226 Difference]: Without dead ends: 75 [2023-11-28 23:57:35,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:57:35,110 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 34 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:35,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 119 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-28 23:57:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 48. [2023-11-28 23:57:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 47 states have internal predecessors, (55), 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) [2023-11-28 23:57:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2023-11-28 23:57:35,116 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 10 [2023-11-28 23:57:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:35,116 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2023-11-28 23:57:35,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:35,117 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2023-11-28 23:57:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 23:57:35,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:35,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:35,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2023-11-28 23:57:35,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:35,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:35,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:35,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1972951204, now seen corresponding path program 1 times [2023-11-28 23:57:35,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:35,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1611893481] [2023-11-28 23:57:35,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:35,320 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 [2023-11-28 23:57:35,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:35,321 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:35,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:35,368 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:57:35,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:35,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:35,424 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:35,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1611893481] [2023-11-28 23:57:35,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1611893481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:35,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:35,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-28 23:57:35,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98219823] [2023-11-28 23:57:35,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:35,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:35,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:35,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:35,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:35,427 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:35,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:35,555 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2023-11-28 23:57:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:57:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-28 23:57:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:35,557 INFO L225 Difference]: With dead ends: 71 [2023-11-28 23:57:35,557 INFO L226 Difference]: Without dead ends: 71 [2023-11-28 23:57:35,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:35,559 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:35,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:35,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-28 23:57:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2023-11-28 23:57:35,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.6) internal successors, (56), 48 states have internal predecessors, (56), 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) [2023-11-28 23:57:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-11-28 23:57:35,564 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 10 [2023-11-28 23:57:35,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:35,565 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-11-28 23:57:35,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-11-28 23:57:35,565 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-11-28 23:57:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 23:57:35,566 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:35,566 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:35,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2023-11-28 23:57:35,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:35,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:35,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:35,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1972950402, now seen corresponding path program 1 times [2023-11-28 23:57:35,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:35,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [885266462] [2023-11-28 23:57:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:35,770 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 [2023-11-28 23:57:35,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:35,771 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:35,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:35,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:57:35,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:35,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2023-11-28 23:57:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:35,841 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:35,841 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:35,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [885266462] [2023-11-28 23:57:35,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [885266462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:35,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:35,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:35,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122125949] [2023-11-28 23:57:35,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:35,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 23:57:35,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:35,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 23:57:35,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 23:57:35,843 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:35,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:35,973 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-11-28 23:57:35,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 23:57:35,974 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-28 23:57:35,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:35,975 INFO L225 Difference]: With dead ends: 43 [2023-11-28 23:57:35,975 INFO L226 Difference]: Without dead ends: 43 [2023-11-28 23:57:35,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-28 23:57:35,975 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:35,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:35,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-28 23:57:35,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-28 23:57:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 42 states have internal predecessors, (50), 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) [2023-11-28 23:57:35,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2023-11-28 23:57:35,980 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 10 [2023-11-28 23:57:35,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:35,980 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2023-11-28 23:57:35,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:35,981 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2023-11-28 23:57:35,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 23:57:35,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:35,981 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:35,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-28 23:57:36,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:36,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:36,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1972950401, now seen corresponding path program 1 times [2023-11-28 23:57:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:36,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1946087914] [2023-11-28 23:57:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:36,183 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 [2023-11-28 23:57:36,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:36,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:36,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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 [2023-11-28 23:57:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:36,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:57:36,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:36,249 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 [2023-11-28 23:57:36,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:36,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:36,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:36,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1946087914] [2023-11-28 23:57:36,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1946087914] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-28 23:57:36,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 23:57:36,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 10 [2023-11-28 23:57:36,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931298611] [2023-11-28 23:57:36,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:36,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 23:57:36,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:36,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 23:57:36,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:57:36,969 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:37,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:37,415 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2023-11-28 23:57:37,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 23:57:37,416 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-28 23:57:37,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:37,417 INFO L225 Difference]: With dead ends: 46 [2023-11-28 23:57:37,417 INFO L226 Difference]: Without dead ends: 46 [2023-11-28 23:57:37,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:57:37,418 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:37,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 29 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-28 23:57:37,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-28 23:57:37,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2023-11-28 23:57:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 42 states have internal predecessors, (51), 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) [2023-11-28 23:57:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2023-11-28 23:57:37,422 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 10 [2023-11-28 23:57:37,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:37,422 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2023-11-28 23:57:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:37,422 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2023-11-28 23:57:37,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 23:57:37,423 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:37,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:37,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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)] Ended with exit code 0 [2023-11-28 23:57:37,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:37,624 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:37,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:37,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1031920300, now seen corresponding path program 1 times [2023-11-28 23:57:37,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:37,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152099281] [2023-11-28 23:57:37,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:37,625 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 [2023-11-28 23:57:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:37,626 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:37,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-28 23:57:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:37,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-28 23:57:37,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:37,685 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 [2023-11-28 23:57:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:37,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:37,983 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:37,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152099281] [2023-11-28 23:57:37,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152099281] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:37,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:37,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-28 23:57:37,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738306465] [2023-11-28 23:57:37,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:37,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:57:37,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:37,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:57:37,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:57:37,985 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:38,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:38,746 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2023-11-28 23:57:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:57:38,747 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-28 23:57:38,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:38,748 INFO L225 Difference]: With dead ends: 67 [2023-11-28 23:57:38,748 INFO L226 Difference]: Without dead ends: 67 [2023-11-28 23:57:38,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:57:38,749 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 69 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:38,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 28 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-28 23:57:38,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-28 23:57:38,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 51. [2023-11-28 23:57:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.3555555555555556) internal successors, (61), 50 states have internal predecessors, (61), 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) [2023-11-28 23:57:38,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-11-28 23:57:38,752 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 11 [2023-11-28 23:57:38,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:38,752 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-11-28 23:57:38,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:38,753 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-11-28 23:57:38,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-28 23:57:38,753 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:38,753 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:38,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2023-11-28 23:57:38,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:38,954 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:38,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:38,954 INFO L85 PathProgramCache]: Analyzing trace with hash 202905448, now seen corresponding path program 1 times [2023-11-28 23:57:38,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:38,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1203592613] [2023-11-28 23:57:38,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:38,955 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 [2023-11-28 23:57:38,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:38,956 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:38,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2023-11-28 23:57:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:39,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:57:39,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:39,091 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_#t~malloc9#1.base_13| (_ BitVec 32))) (and (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_13|) (_ bv0 1)) (= (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_#t~malloc9#1.base_13| (_ bv0 1)) |c_#valid|))) is different from true [2023-11-28 23:57:39,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-28 23:57:39,092 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:39,092 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:39,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1203592613] [2023-11-28 23:57:39,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1203592613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:39,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:39,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 23:57:39,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469747130] [2023-11-28 23:57:39,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:39,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 23:57:39,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:39,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 23:57:39,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=8, Unknown=1, NotChecked=4, Total=20 [2023-11-28 23:57:39,094 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:39,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:39,186 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2023-11-28 23:57:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:57:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-28 23:57:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:39,187 INFO L225 Difference]: With dead ends: 50 [2023-11-28 23:57:39,188 INFO L226 Difference]: Without dead ends: 48 [2023-11-28 23:57:39,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=13, Unknown=1, NotChecked=6, Total=30 [2023-11-28 23:57:39,188 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:39,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2023-11-28 23:57:39,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-28 23:57:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-28 23:57:39,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 47 states have internal predecessors, (58), 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) [2023-11-28 23:57:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-11-28 23:57:39,193 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 13 [2023-11-28 23:57:39,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:39,193 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-11-28 23:57:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-11-28 23:57:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-28 23:57:39,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:39,195 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1] [2023-11-28 23:57:39,197 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2023-11-28 23:57:39,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:39,396 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:39,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash 887846672, now seen corresponding path program 2 times [2023-11-28 23:57:39,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:39,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514584741] [2023-11-28 23:57:39,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:57:39,397 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 [2023-11-28 23:57:39,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:39,398 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:39,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2023-11-28 23:57:39,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:57:39,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:39,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:57:39,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:39,492 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 [2023-11-28 23:57:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:39,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:40,790 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:40,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514584741] [2023-11-28 23:57:40,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514584741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:40,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:40,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-28 23:57:40,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105159010] [2023-11-28 23:57:40,791 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:40,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 23:57:40,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:40,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 23:57:40,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:57:40,793 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2023-11-28 23:57:44,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:44,601 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2023-11-28 23:57:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 23:57:44,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-28 23:57:44,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:44,602 INFO L225 Difference]: With dead ends: 68 [2023-11-28 23:57:44,602 INFO L226 Difference]: Without dead ends: 68 [2023-11-28 23:57:44,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=309, Invalid=621, Unknown=0, NotChecked=0, Total=930 [2023-11-28 23:57:44,603 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:44,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 62 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-28 23:57:44,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-28 23:57:44,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2023-11-28 23:57:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 59 states have internal predecessors, (76), 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) [2023-11-28 23:57:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 76 transitions. [2023-11-28 23:57:44,608 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 76 transitions. Word has length 13 [2023-11-28 23:57:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:44,608 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 76 transitions. [2023-11-28 23:57:44,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 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) [2023-11-28 23:57:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 76 transitions. [2023-11-28 23:57:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 23:57:44,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:44,609 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:44,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:44,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:44,810 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:44,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:44,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1995126472, now seen corresponding path program 1 times [2023-11-28 23:57:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:44,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1340536386] [2023-11-28 23:57:44,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:44,811 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 [2023-11-28 23:57:44,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:44,812 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:44,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-28 23:57:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:44,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-28 23:57:44,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:44,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:44,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:44,955 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:44,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1340536386] [2023-11-28 23:57:44,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1340536386] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:44,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:44,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-28 23:57:44,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581844207] [2023-11-28 23:57:44,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:44,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 23:57:44,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:44,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 23:57:44,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-28 23:57:44,957 INFO L87 Difference]: Start difference. First operand 60 states and 76 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:45,056 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2023-11-28 23:57:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 23:57:45,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-28 23:57:45,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:45,058 INFO L225 Difference]: With dead ends: 62 [2023-11-28 23:57:45,058 INFO L226 Difference]: Without dead ends: 53 [2023-11-28 23:57:45,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-28 23:57:45,059 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:45,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 87 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 23:57:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-28 23:57:45,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-11-28 23:57:45,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 52 states have internal predecessors, (68), 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) [2023-11-28 23:57:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2023-11-28 23:57:45,063 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 14 [2023-11-28 23:57:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:45,063 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2023-11-28 23:57:45,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 23:57:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2023-11-28 23:57:45,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 23:57:45,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:45,064 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:45,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2023-11-28 23:57:45,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:45,265 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:45,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:45,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1408320458, now seen corresponding path program 1 times [2023-11-28 23:57:45,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:45,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2097815147] [2023-11-28 23:57:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:45,266 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 [2023-11-28 23:57:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:45,267 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:45,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2023-11-28 23:57:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:45,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-28 23:57:45,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:45,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 23:57:45,386 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:45,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2097815147] [2023-11-28 23:57:45,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2097815147] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 23:57:45,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 23:57:45,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 23:57:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14482520] [2023-11-28 23:57:45,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 23:57:45,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 23:57:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 23:57:45,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 23:57:45,387 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-28 23:57:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:45,637 INFO L93 Difference]: Finished difference Result 70 states and 86 transitions. [2023-11-28 23:57:45,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 23:57:45,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 14 [2023-11-28 23:57:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:45,638 INFO L225 Difference]: With dead ends: 70 [2023-11-28 23:57:45,639 INFO L226 Difference]: Without dead ends: 68 [2023-11-28 23:57:45,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-28 23:57:45,640 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:45,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 37 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 23:57:45,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-28 23:57:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2023-11-28 23:57:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3958333333333333) internal successors, (67), 52 states have internal predecessors, (67), 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) [2023-11-28 23:57:45,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-11-28 23:57:45,644 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 14 [2023-11-28 23:57:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:45,644 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-11-28 23:57:45,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2023-11-28 23:57:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-11-28 23:57:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-28 23:57:45,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:45,645 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:45,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2023-11-28 23:57:45,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:45,846 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:45,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:45,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1636245943, now seen corresponding path program 1 times [2023-11-28 23:57:45,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:45,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833665213] [2023-11-28 23:57:45,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:45,847 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 [2023-11-28 23:57:45,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:45,848 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:45,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2023-11-28 23:57:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:45,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:57:45,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:45,924 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 [2023-11-28 23:57:46,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:46,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 23:57:46,788 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:46,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833665213] [2023-11-28 23:57:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833665213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:46,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:46,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2023-11-28 23:57:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183219800] [2023-11-28 23:57:46,788 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-28 23:57:46,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-28 23:57:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-28 23:57:46,789 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 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) [2023-11-28 23:57:47,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:47,843 INFO L93 Difference]: Finished difference Result 77 states and 95 transitions. [2023-11-28 23:57:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-28 23:57:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 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 15 [2023-11-28 23:57:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:47,845 INFO L225 Difference]: With dead ends: 77 [2023-11-28 23:57:47,845 INFO L226 Difference]: Without dead ends: 77 [2023-11-28 23:57:47,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2023-11-28 23:57:47,846 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 292 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:47,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 22 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:57:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-28 23:57:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 56. [2023-11-28 23:57:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 55 states have internal predecessors, (73), 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) [2023-11-28 23:57:47,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2023-11-28 23:57:47,848 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 15 [2023-11-28 23:57:47,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:47,849 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2023-11-28 23:57:47,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 13 states have internal predecessors, (29), 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) [2023-11-28 23:57:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2023-11-28 23:57:47,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 23:57:47,849 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:47,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:47,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2023-11-28 23:57:48,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:48,050 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:48,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:48,051 INFO L85 PathProgramCache]: Analyzing trace with hash -815983332, now seen corresponding path program 1 times [2023-11-28 23:57:48,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:48,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815020137] [2023-11-28 23:57:48,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:57:48,051 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 [2023-11-28 23:57:48,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:48,052 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:48,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2023-11-28 23:57:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:57:48,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-28 23:57:48,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:48,122 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 [2023-11-28 23:57:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:48,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:49,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:49,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815020137] [2023-11-28 23:57:49,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815020137] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:49,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:49,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-28 23:57:49,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593366890] [2023-11-28 23:57:49,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:49,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-28 23:57:49,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:49,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-28 23:57:49,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-11-28 23:57:49,462 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2023-11-28 23:57:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:50,521 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-11-28 23:57:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:57:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 16 [2023-11-28 23:57:50,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:50,523 INFO L225 Difference]: With dead ends: 61 [2023-11-28 23:57:50,523 INFO L226 Difference]: Without dead ends: 56 [2023-11-28 23:57:50,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-11-28 23:57:50,524 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 40 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:50,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:57:50,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-28 23:57:50,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-28 23:57:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 55 states have internal predecessors, (72), 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) [2023-11-28 23:57:50,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 72 transitions. [2023-11-28 23:57:50,527 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 72 transitions. Word has length 16 [2023-11-28 23:57:50,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:50,527 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 72 transitions. [2023-11-28 23:57:50,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2023-11-28 23:57:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 72 transitions. [2023-11-28 23:57:50,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-28 23:57:50,528 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:50,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:57:50,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Ended with exit code 0 [2023-11-28 23:57:50,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:50,729 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:50,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:50,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1061843382, now seen corresponding path program 2 times [2023-11-28 23:57:50,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:50,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [569883145] [2023-11-28 23:57:50,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:57:50,730 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 [2023-11-28 23:57:50,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:50,731 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:50,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2023-11-28 23:57:50,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:57:50,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:50,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:57:50,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:50,815 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 [2023-11-28 23:57:51,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:57:51,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:57:52,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-28 23:57:52,628 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:57:52,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [569883145] [2023-11-28 23:57:52,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [569883145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:57:52,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:57:52,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-28 23:57:52,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129825430] [2023-11-28 23:57:52,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:57:52,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-28 23:57:52,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:57:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-28 23:57:52,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-11-28 23:57:52,630 INFO L87 Difference]: Start difference. First operand 56 states and 72 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 15 states have internal predecessors, (31), 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) [2023-11-28 23:57:57,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:57:57,358 INFO L93 Difference]: Finished difference Result 128 states and 159 transitions. [2023-11-28 23:57:57,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-28 23:57:57,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 15 states have internal predecessors, (31), 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 18 [2023-11-28 23:57:57,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:57:57,359 INFO L225 Difference]: With dead ends: 128 [2023-11-28 23:57:57,359 INFO L226 Difference]: Without dead ends: 128 [2023-11-28 23:57:57,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2023-11-28 23:57:57,361 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 322 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:57:57,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 26 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-28 23:57:57,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-11-28 23:57:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 113. [2023-11-28 23:57:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 111 states have (on average 1.2882882882882882) internal successors, (143), 112 states have internal predecessors, (143), 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) [2023-11-28 23:57:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2023-11-28 23:57:57,365 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 18 [2023-11-28 23:57:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:57:57,365 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2023-11-28 23:57:57,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 15 states have internal predecessors, (31), 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) [2023-11-28 23:57:57,365 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2023-11-28 23:57:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-28 23:57:57,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:57:57,366 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1] [2023-11-28 23:57:57,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2023-11-28 23:57:57,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:57:57,567 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:57:57,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:57:57,567 INFO L85 PathProgramCache]: Analyzing trace with hash 597330548, now seen corresponding path program 3 times [2023-11-28 23:57:57,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:57:57,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2007393024] [2023-11-28 23:57:57,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:57:57,568 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 [2023-11-28 23:57:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:57:57,569 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:57:57,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2023-11-28 23:57:57,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-28 23:57:57,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:57:57,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-28 23:57:57,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:57:57,821 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 [2023-11-28 23:57:58,357 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:57:58,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:01,149 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:01,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:01,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2007393024] [2023-11-28 23:58:01,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2007393024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:01,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:01,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 27 [2023-11-28 23:58:01,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247352200] [2023-11-28 23:58:01,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:01,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-28 23:58:01,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:01,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-28 23:58:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2023-11-28 23:58:01,151 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 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) [2023-11-28 23:58:29,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:29,238 INFO L93 Difference]: Finished difference Result 156 states and 198 transitions. [2023-11-28 23:58:29,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-28 23:58:29,240 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 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 25 [2023-11-28 23:58:29,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:29,241 INFO L225 Difference]: With dead ends: 156 [2023-11-28 23:58:29,241 INFO L226 Difference]: Without dead ends: 156 [2023-11-28 23:58:29,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 880 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=1158, Invalid=2502, Unknown=0, NotChecked=0, Total=3660 [2023-11-28 23:58:29,243 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 207 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:29,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 106 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-28 23:58:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-28 23:58:29,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 137. [2023-11-28 23:58:29,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.325925925925926) internal successors, (179), 136 states have internal predecessors, (179), 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) [2023-11-28 23:58:29,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 179 transitions. [2023-11-28 23:58:29,248 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 179 transitions. Word has length 25 [2023-11-28 23:58:29,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:29,249 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 179 transitions. [2023-11-28 23:58:29,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 28 states have internal predecessors, (49), 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) [2023-11-28 23:58:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 179 transitions. [2023-11-28 23:58:29,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-28 23:58:29,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:29,250 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:29,253 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2023-11-28 23:58:29,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:29,451 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:29,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash 591767908, now seen corresponding path program 1 times [2023-11-28 23:58:29,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:29,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440273282] [2023-11-28 23:58:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 23:58:29,452 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 [2023-11-28 23:58:29,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:29,453 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:29,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2023-11-28 23:58:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 23:58:29,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:58:29,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-28 23:58:29,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:30,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:30,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440273282] [2023-11-28 23:58:30,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440273282] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:30,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:30,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2023-11-28 23:58:30,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935961792] [2023-11-28 23:58:30,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:30,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 23:58:30,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:30,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 23:58:30,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-11-28 23:58:30,312 INFO L87 Difference]: Start difference. First operand 137 states and 179 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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) [2023-11-28 23:58:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:31,393 INFO L93 Difference]: Finished difference Result 174 states and 221 transitions. [2023-11-28 23:58:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-28 23:58:31,395 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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 26 [2023-11-28 23:58:31,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:31,396 INFO L225 Difference]: With dead ends: 174 [2023-11-28 23:58:31,396 INFO L226 Difference]: Without dead ends: 137 [2023-11-28 23:58:31,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2023-11-28 23:58:31,397 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 70 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:31,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 41 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-28 23:58:31,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-28 23:58:31,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-11-28 23:58:31,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 135 states have (on average 1.3185185185185184) internal successors, (178), 136 states have internal predecessors, (178), 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) [2023-11-28 23:58:31,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2023-11-28 23:58:31,401 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 26 [2023-11-28 23:58:31,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:31,401 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2023-11-28 23:58:31,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 19 states have internal predecessors, (45), 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) [2023-11-28 23:58:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2023-11-28 23:58:31,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-28 23:58:31,402 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:31,402 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:31,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Ended with exit code 0 [2023-11-28 23:58:31,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:31,603 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:31,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:31,603 INFO L85 PathProgramCache]: Analyzing trace with hash 281251198, now seen corresponding path program 2 times [2023-11-28 23:58:31,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:31,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267954531] [2023-11-28 23:58:31,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 23:58:31,604 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 [2023-11-28 23:58:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:31,605 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2023-11-28 23:58:31,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 23:58:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:31,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-28 23:58:31,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:31,724 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 [2023-11-28 23:58:32,306 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:58:32,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:33,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:58:33,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:33,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267954531] [2023-11-28 23:58:33,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267954531] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:33,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:33,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2023-11-28 23:58:33,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565397763] [2023-11-28 23:58:33,056 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:33,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-28 23:58:33,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:33,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-28 23:58:33,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2023-11-28 23:58:33,057 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-11-28 23:58:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:33,744 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2023-11-28 23:58:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 23:58:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 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 28 [2023-11-28 23:58:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:33,746 INFO L225 Difference]: With dead ends: 141 [2023-11-28 23:58:33,746 INFO L226 Difference]: Without dead ends: 141 [2023-11-28 23:58:33,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2023-11-28 23:58:33,747 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 174 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:33,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 28 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:58:33,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-28 23:58:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 117. [2023-11-28 23:58:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 115 states have (on average 1.3130434782608695) internal successors, (151), 116 states have internal predecessors, (151), 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) [2023-11-28 23:58:33,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 151 transitions. [2023-11-28 23:58:33,750 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 151 transitions. Word has length 28 [2023-11-28 23:58:33,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:33,751 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 151 transitions. [2023-11-28 23:58:33,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 14 states have internal predecessors, (43), 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) [2023-11-28 23:58:33,751 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 151 transitions. [2023-11-28 23:58:33,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-28 23:58:33,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:33,751 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:33,754 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Ended with exit code 0 [2023-11-28 23:58:33,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:33,952 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:33,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:33,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1687566112, now seen corresponding path program 3 times [2023-11-28 23:58:33,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:33,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542291117] [2023-11-28 23:58:33,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:58:33,953 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 [2023-11-28 23:58:33,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:33,954 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:33,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2023-11-28 23:58:34,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-28 23:58:34,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:34,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-28 23:58:34,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:34,075 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 [2023-11-28 23:58:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:58:34,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-28 23:58:37,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:37,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542291117] [2023-11-28 23:58:37,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542291117] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:37,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:37,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-28 23:58:37,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821143072] [2023-11-28 23:58:37,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:37,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-28 23:58:37,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:37,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-28 23:58:37,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2023-11-28 23:58:37,023 INFO L87 Difference]: Start difference. First operand 117 states and 151 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 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) [2023-11-28 23:58:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:41,917 INFO L93 Difference]: Finished difference Result 207 states and 256 transitions. [2023-11-28 23:58:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-28 23:58:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 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 31 [2023-11-28 23:58:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:41,920 INFO L225 Difference]: With dead ends: 207 [2023-11-28 23:58:41,920 INFO L226 Difference]: Without dead ends: 207 [2023-11-28 23:58:41,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=393, Invalid=1247, Unknown=0, NotChecked=0, Total=1640 [2023-11-28 23:58:41,922 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 609 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:41,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 60 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-28 23:58:41,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-28 23:58:41,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 149. [2023-11-28 23:58:41,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.2993197278911566) internal successors, (191), 148 states have internal predecessors, (191), 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) [2023-11-28 23:58:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 191 transitions. [2023-11-28 23:58:41,926 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 191 transitions. Word has length 31 [2023-11-28 23:58:41,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:41,926 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 191 transitions. [2023-11-28 23:58:41,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 19 states have internal predecessors, (53), 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) [2023-11-28 23:58:41,927 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 191 transitions. [2023-11-28 23:58:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-28 23:58:41,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:41,927 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:41,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (23)] Ended with exit code 0 [2023-11-28 23:58:42,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:42,128 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:42,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:42,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2009480114, now seen corresponding path program 4 times [2023-11-28 23:58:42,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:42,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122681403] [2023-11-28 23:58:42,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:58:42,129 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 [2023-11-28 23:58:42,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:42,130 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:42,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2023-11-28 23:58:42,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:58:42,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:42,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-28 23:58:42,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:42,478 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-28 23:58:42,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-28 23:58:42,934 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:42,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122681403] [2023-11-28 23:58:42,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122681403] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:42,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:42,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-28 23:58:42,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238380552] [2023-11-28 23:58:42,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:42,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:58:42,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:42,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:58:42,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:58:42,935 INFO L87 Difference]: Start difference. First operand 149 states and 191 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2023-11-28 23:58:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:43,661 INFO L93 Difference]: Finished difference Result 150 states and 190 transitions. [2023-11-28 23:58:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-28 23:58:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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 33 [2023-11-28 23:58:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:43,663 INFO L225 Difference]: With dead ends: 150 [2023-11-28 23:58:43,664 INFO L226 Difference]: Without dead ends: 150 [2023-11-28 23:58:43,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:58:43,665 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 290 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:43,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 30 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-28 23:58:43,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-28 23:58:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2023-11-28 23:58:43,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 147 states have (on average 1.2925170068027212) internal successors, (190), 148 states have internal predecessors, (190), 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) [2023-11-28 23:58:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 190 transitions. [2023-11-28 23:58:43,670 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 190 transitions. Word has length 33 [2023-11-28 23:58:43,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:43,670 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 190 transitions. [2023-11-28 23:58:43,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 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) [2023-11-28 23:58:43,671 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 190 transitions. [2023-11-28 23:58:43,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-28 23:58:43,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:43,672 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:43,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (24)] Ended with exit code 0 [2023-11-28 23:58:43,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:43,872 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:43,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:43,873 INFO L85 PathProgramCache]: Analyzing trace with hash 466740768, now seen corresponding path program 3 times [2023-11-28 23:58:43,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:43,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141035077] [2023-11-28 23:58:43,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-28 23:58:43,873 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 [2023-11-28 23:58:43,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:43,874 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:43,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2023-11-28 23:58:44,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-28 23:58:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:44,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 23:58:44,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:44,152 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 [2023-11-28 23:58:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:44,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 4 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:58:46,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:46,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141035077] [2023-11-28 23:58:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141035077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:46,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:46,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2023-11-28 23:58:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502049129] [2023-11-28 23:58:46,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:46,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-28 23:58:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:46,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-28 23:58:46,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2023-11-28 23:58:46,378 INFO L87 Difference]: Start difference. First operand 149 states and 190 transitions. Second operand has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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) [2023-11-28 23:58:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:50,996 INFO L93 Difference]: Finished difference Result 385 states and 464 transitions. [2023-11-28 23:58:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-28 23:58:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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 35 [2023-11-28 23:58:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:51,000 INFO L225 Difference]: With dead ends: 385 [2023-11-28 23:58:51,000 INFO L226 Difference]: Without dead ends: 379 [2023-11-28 23:58:51,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=323, Invalid=1237, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 23:58:51,001 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 251 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:51,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 200 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-28 23:58:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-11-28 23:58:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 348. [2023-11-28 23:58:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 346 states have (on average 1.2427745664739884) internal successors, (430), 347 states have internal predecessors, (430), 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) [2023-11-28 23:58:51,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 430 transitions. [2023-11-28 23:58:51,011 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 430 transitions. Word has length 35 [2023-11-28 23:58:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:51,012 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 430 transitions. [2023-11-28 23:58:51,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 27 states have internal predecessors, (68), 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) [2023-11-28 23:58:51,012 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 430 transitions. [2023-11-28 23:58:51,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-28 23:58:51,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:51,013 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:51,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (25)] Ended with exit code 0 [2023-11-28 23:58:51,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:51,213 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:51,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:51,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1695711746, now seen corresponding path program 5 times [2023-11-28 23:58:51,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:51,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471358637] [2023-11-28 23:58:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-28 23:58:51,214 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 [2023-11-28 23:58:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:51,216 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:51,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2023-11-28 23:58:51,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-28 23:58:51,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:51,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-28 23:58:51,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-28 23:58:51,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:52,121 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-28 23:58:52,121 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:52,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471358637] [2023-11-28 23:58:52,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471358637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:52,121 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:52,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-28 23:58:52,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604222086] [2023-11-28 23:58:52,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:52,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-28 23:58:52,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:52,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-28 23:58:52,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-11-28 23:58:52,123 INFO L87 Difference]: Start difference. First operand 348 states and 430 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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) [2023-11-28 23:58:53,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:58:53,048 INFO L93 Difference]: Finished difference Result 462 states and 555 transitions. [2023-11-28 23:58:53,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-28 23:58:53,049 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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 38 [2023-11-28 23:58:53,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:58:53,051 INFO L225 Difference]: With dead ends: 462 [2023-11-28 23:58:53,051 INFO L226 Difference]: Without dead ends: 307 [2023-11-28 23:58:53,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:58:53,052 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-28 23:58:53,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 107 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-28 23:58:53,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-28 23:58:53,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 290. [2023-11-28 23:58:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 288 states have (on average 1.1875) internal successors, (342), 289 states have internal predecessors, (342), 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) [2023-11-28 23:58:53,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 342 transitions. [2023-11-28 23:58:53,062 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 342 transitions. Word has length 38 [2023-11-28 23:58:53,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:58:53,063 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 342 transitions. [2023-11-28 23:58:53,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 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) [2023-11-28 23:58:53,063 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 342 transitions. [2023-11-28 23:58:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-28 23:58:53,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:58:53,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:58:53,069 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2023-11-28 23:58:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:58:53,270 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:58:53,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:58:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash -186620180, now seen corresponding path program 4 times [2023-11-28 23:58:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:58:53,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1935172091] [2023-11-28 23:58:53,270 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:58:53,271 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 [2023-11-28 23:58:53,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:58:53,272 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:58:53,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2023-11-28 23:58:53,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:58:53,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:58:53,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-28 23:58:53,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:58:53,399 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 [2023-11-28 23:58:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-28 23:58:54,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:58:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-28 23:58:57,521 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:58:57,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1935172091] [2023-11-28 23:58:57,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1935172091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:58:57,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:58:57,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-28 23:58:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752537783] [2023-11-28 23:58:57,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:58:57,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-28 23:58:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:58:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-28 23:58:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2023-11-28 23:58:57,524 INFO L87 Difference]: Start difference. First operand 290 states and 342 transitions. Second operand has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 states have internal predecessors, (61), 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) [2023-11-28 23:59:24,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:59:24,197 INFO L93 Difference]: Finished difference Result 380 states and 446 transitions. [2023-11-28 23:59:24,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-28 23:59:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 states have internal predecessors, (61), 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 39 [2023-11-28 23:59:24,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:59:24,200 INFO L225 Difference]: With dead ends: 380 [2023-11-28 23:59:24,200 INFO L226 Difference]: Without dead ends: 380 [2023-11-28 23:59:24,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=1118, Invalid=3042, Unknown=0, NotChecked=0, Total=4160 [2023-11-28 23:59:24,203 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 686 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-11-28 23:59:24,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [686 Valid, 114 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-11-28 23:59:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2023-11-28 23:59:24,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 364. [2023-11-28 23:59:24,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.1988950276243093) internal successors, (434), 363 states have internal predecessors, (434), 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) [2023-11-28 23:59:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 434 transitions. [2023-11-28 23:59:24,213 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 434 transitions. Word has length 39 [2023-11-28 23:59:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:24,213 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 434 transitions. [2023-11-28 23:59:24,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.652173913043478) internal successors, (61), 24 states have internal predecessors, (61), 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) [2023-11-28 23:59:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 434 transitions. [2023-11-28 23:59:24,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-28 23:59:24,214 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:24,214 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 23:59:24,217 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (27)] Ended with exit code 0 [2023-11-28 23:59:24,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:59:24,415 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:59:24,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:24,415 INFO L85 PathProgramCache]: Analyzing trace with hash 491906420, now seen corresponding path program 6 times [2023-11-28 23:59:24,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:59:24,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2127055756] [2023-11-28 23:59:24,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-28 23:59:24,416 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 [2023-11-28 23:59:24,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:59:24,417 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:59:24,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2023-11-28 23:59:24,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-28 23:59:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:59:24,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-28 23:59:24,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:24,736 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 [2023-11-28 23:59:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 42 proven. 27 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-28 23:59:25,765 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:59:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-28 23:59:30,140 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:59:30,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2127055756] [2023-11-28 23:59:30,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2127055756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:59:30,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:59:30,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-28 23:59:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738256596] [2023-11-28 23:59:30,140 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:59:30,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-28 23:59:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:59:30,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-28 23:59:30,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2023-11-28 23:59:30,142 INFO L87 Difference]: Start difference. First operand 364 states and 434 transitions. Second operand has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 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) [2023-11-28 23:59:34,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 23:59:34,868 INFO L93 Difference]: Finished difference Result 367 states and 433 transitions. [2023-11-28 23:59:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-28 23:59:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 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 45 [2023-11-28 23:59:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 23:59:34,873 INFO L225 Difference]: With dead ends: 367 [2023-11-28 23:59:34,873 INFO L226 Difference]: Without dead ends: 367 [2023-11-28 23:59:34,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=354, Invalid=1206, Unknown=0, NotChecked=0, Total=1560 [2023-11-28 23:59:34,874 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 514 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-28 23:59:34,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 95 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-28 23:59:34,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-28 23:59:34,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 279. [2023-11-28 23:59:34,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 277 states have (on average 1.2093862815884477) internal successors, (335), 278 states have internal predecessors, (335), 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) [2023-11-28 23:59:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 335 transitions. [2023-11-28 23:59:34,880 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 335 transitions. Word has length 45 [2023-11-28 23:59:34,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 23:59:34,880 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 335 transitions. [2023-11-28 23:59:34,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.76) internal successors, (69), 26 states have internal predecessors, (69), 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) [2023-11-28 23:59:34,880 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 335 transitions. [2023-11-28 23:59:34,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-28 23:59:34,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 23:59:34,881 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1] [2023-11-28 23:59:34,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (28)] Ended with exit code 0 [2023-11-28 23:59:35,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-28 23:59:35,082 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 23:59:35,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 23:59:35,082 INFO L85 PathProgramCache]: Analyzing trace with hash 850906940, now seen corresponding path program 4 times [2023-11-28 23:59:35,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-28 23:59:35,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862628685] [2023-11-28 23:59:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-28 23:59:35,083 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 [2023-11-28 23:59:35,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-28 23:59:35,084 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-28 23:59:35,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2023-11-28 23:59:35,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-28 23:59:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 23:59:35,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-28 23:59:35,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 23:59:35,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-28 23:59:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:59:37,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 23:59:48,180 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 23:59:48,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-28 23:59:48,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862628685] [2023-11-28 23:59:48,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1862628685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 23:59:48,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-28 23:59:48,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 51 [2023-11-28 23:59:48,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571868085] [2023-11-28 23:59:48,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-28 23:59:48,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-28 23:59:48,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-28 23:59:48,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-28 23:59:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=1972, Unknown=0, NotChecked=0, Total=2652 [2023-11-28 23:59:48,183 INFO L87 Difference]: Start difference. First operand 279 states and 335 transitions. Second operand has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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) [2023-11-29 00:00:15,185 WARN L293 SmtUtils]: Spent 18.60s on a formula simplification that was a NOOP. DAG size: 257 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:01:01,795 WARN L293 SmtUtils]: Spent 45.16s on a formula simplification. DAG size of input: 253 DAG size of output: 252 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:01:17,096 WARN L293 SmtUtils]: Spent 13.60s on a formula simplification that was a NOOP. DAG size: 246 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:01:52,324 WARN L293 SmtUtils]: Spent 33.69s on a formula simplification. DAG size of input: 242 DAG size of output: 241 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:02:08,016 WARN L293 SmtUtils]: Spent 14.17s on a formula simplification that was a NOOP. DAG size: 235 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:02:43,311 WARN L293 SmtUtils]: Spent 33.81s on a formula simplification. DAG size of input: 231 DAG size of output: 230 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:02:57,036 WARN L293 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 225 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:03:27,043 WARN L293 SmtUtils]: Spent 28.43s on a formula simplification. DAG size of input: 221 DAG size of output: 220 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:03:40,887 WARN L293 SmtUtils]: Spent 12.33s on a formula simplification that was a NOOP. DAG size: 214 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:04:07,080 WARN L293 SmtUtils]: Spent 24.50s on a formula simplification. DAG size of input: 210 DAG size of output: 209 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:04:20,951 WARN L293 SmtUtils]: Spent 12.23s on a formula simplification that was a NOOP. DAG size: 203 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:04:43,252 WARN L293 SmtUtils]: Spent 20.63s on a formula simplification. DAG size of input: 199 DAG size of output: 198 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:04:55,860 WARN L293 SmtUtils]: Spent 11.09s on a formula simplification that was a NOOP. DAG size: 192 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:05:16,325 WARN L293 SmtUtils]: Spent 19.06s on a formula simplification. DAG size of input: 188 DAG size of output: 187 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:05:22,980 WARN L293 SmtUtils]: Spent 5.31s on a formula simplification that was a NOOP. DAG size: 182 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:05:38,226 WARN L293 SmtUtils]: Spent 13.76s on a formula simplification. DAG size of input: 178 DAG size of output: 177 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:05:45,813 WARN L293 SmtUtils]: Spent 6.20s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:05:56,704 WARN L293 SmtUtils]: Spent 9.47s on a formula simplification. DAG size of input: 167 DAG size of output: 166 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:06:12,220 WARN L293 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 156 DAG size of output: 155 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:06:24,948 WARN L293 SmtUtils]: Spent 6.12s on a formula simplification. DAG size of input: 145 DAG size of output: 144 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:06:35,967 WARN L293 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 135 DAG size of output: 134 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 00:07:20,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:20,078 INFO L93 Difference]: Finished difference Result 367 states and 447 transitions. [2023-11-29 00:07:20,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-29 00:07:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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 49 [2023-11-29 00:07:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:20,082 INFO L225 Difference]: With dead ends: 367 [2023-11-29 00:07:20,082 INFO L226 Difference]: Without dead ends: 367 [2023-11-29 00:07:20,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3772 ImplicationChecksByTransitivity, 453.0s TimeCoverageRelationStatistics Valid=4476, Invalid=10044, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 00:07:20,086 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 877 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 877 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:20,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [877 Valid, 183 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2371 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2023-11-29 00:07:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-11-29 00:07:20,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 327. [2023-11-29 00:07:20,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 325 states have (on average 1.2523076923076923) internal successors, (407), 326 states have internal predecessors, (407), 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) [2023-11-29 00:07:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 407 transitions. [2023-11-29 00:07:20,091 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 407 transitions. Word has length 49 [2023-11-29 00:07:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:20,091 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 407 transitions. [2023-11-29 00:07:20,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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) [2023-11-29 00:07:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 407 transitions. [2023-11-29 00:07:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-29 00:07:20,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:20,092 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:20,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2023-11-29 00:07:20,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:07:20,293 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:07:20,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:20,293 INFO L85 PathProgramCache]: Analyzing trace with hash 427583740, now seen corresponding path program 7 times [2023-11-29 00:07:20,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:07:20,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1909335379] [2023-11-29 00:07:20,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:07:20,294 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 [2023-11-29 00:07:20,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:07:20,295 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:07:20,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2023-11-29 00:07:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:07:20,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 00:07:20,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:20,941 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:07:20,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:22,119 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 56 proven. 43 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 00:07:22,119 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:07:22,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1909335379] [2023-11-29 00:07:22,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1909335379] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:22,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:22,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2023-11-29 00:07:22,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641955191] [2023-11-29 00:07:22,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:22,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-29 00:07:22,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:07:22,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-29 00:07:22,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:07:22,121 INFO L87 Difference]: Start difference. First operand 327 states and 407 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 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) [2023-11-29 00:07:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:25,435 INFO L93 Difference]: Finished difference Result 368 states and 448 transitions. [2023-11-29 00:07:25,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 00:07:25,437 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 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 50 [2023-11-29 00:07:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:25,438 INFO L225 Difference]: With dead ends: 368 [2023-11-29 00:07:25,438 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 00:07:25,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=535, Invalid=2015, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:07:25,440 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 324 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:25,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 134 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 00:07:25,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 00:07:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2023-11-29 00:07:25,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 272 states have (on average 1.2683823529411764) internal successors, (345), 273 states have internal predecessors, (345), 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) [2023-11-29 00:07:25,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 345 transitions. [2023-11-29 00:07:25,445 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 345 transitions. Word has length 50 [2023-11-29 00:07:25,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:25,445 INFO L495 AbstractCegarLoop]: Abstraction has 274 states and 345 transitions. [2023-11-29 00:07:25,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 26 states have internal predecessors, (79), 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) [2023-11-29 00:07:25,445 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 345 transitions. [2023-11-29 00:07:25,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 00:07:25,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:25,446 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:25,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (30)] Ended with exit code 0 [2023-11-29 00:07:25,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:07:25,647 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:07:25,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1225258370, now seen corresponding path program 8 times [2023-11-29 00:07:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:07:25,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [790316707] [2023-11-29 00:07:25,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:07:25,647 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 [2023-11-29 00:07:25,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:07:25,648 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:07:25,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2023-11-29 00:07:25,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:07:25,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:25,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:07:25,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:26,475 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 00:07:26,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:27,565 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 31 proven. 104 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-29 00:07:27,565 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:07:27,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [790316707] [2023-11-29 00:07:27,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [790316707] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:27,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:27,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2023-11-29 00:07:27,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230015621] [2023-11-29 00:07:27,566 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:27,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 00:07:27,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:07:27,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 00:07:27,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:07:27,567 INFO L87 Difference]: Start difference. First operand 274 states and 345 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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) [2023-11-29 00:07:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:31,748 INFO L93 Difference]: Finished difference Result 345 states and 421 transitions. [2023-11-29 00:07:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 00:07:31,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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 57 [2023-11-29 00:07:31,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:31,750 INFO L225 Difference]: With dead ends: 345 [2023-11-29 00:07:31,751 INFO L226 Difference]: Without dead ends: 285 [2023-11-29 00:07:31,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=618, Invalid=2462, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:07:31,752 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 466 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 466 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:31,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [466 Valid, 188 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:07:31,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-29 00:07:31,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2023-11-29 00:07:31,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 281 states have (on average 1.2597864768683273) internal successors, (354), 282 states have internal predecessors, (354), 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) [2023-11-29 00:07:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 354 transitions. [2023-11-29 00:07:31,756 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 354 transitions. Word has length 57 [2023-11-29 00:07:31,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:31,756 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 354 transitions. [2023-11-29 00:07:31,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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) [2023-11-29 00:07:31,756 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 354 transitions. [2023-11-29 00:07:31,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-29 00:07:31,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:31,757 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:31,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (31)] Ended with exit code 0 [2023-11-29 00:07:31,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:07:31,958 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:07:31,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:31,959 INFO L85 PathProgramCache]: Analyzing trace with hash 241762326, now seen corresponding path program 9 times [2023-11-29 00:07:31,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:07:31,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1144451755] [2023-11-29 00:07:31,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:07:31,961 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 [2023-11-29 00:07:31,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:07:31,964 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:07:31,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2023-11-29 00:07:32,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:07:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:32,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:07:32,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:32,234 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 [2023-11-29 00:07:33,607 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 00:07:33,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:07:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 1 proven. 118 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-29 00:07:37,309 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:07:37,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1144451755] [2023-11-29 00:07:37,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1144451755] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:07:37,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:07:37,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2023-11-29 00:07:37,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636028166] [2023-11-29 00:07:37,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:07:37,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 00:07:37,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:07:37,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 00:07:37,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-11-29 00:07:37,311 INFO L87 Difference]: Start difference. First operand 283 states and 354 transitions. Second operand has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-11-29 00:07:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:07:56,073 INFO L93 Difference]: Finished difference Result 325 states and 401 transitions. [2023-11-29 00:07:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 00:07:56,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 24 states have internal predecessors, (67), 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 62 [2023-11-29 00:07:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:07:56,075 INFO L225 Difference]: With dead ends: 325 [2023-11-29 00:07:56,075 INFO L226 Difference]: Without dead ends: 325 [2023-11-29 00:07:56,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1183 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=991, Invalid=2915, Unknown=0, NotChecked=0, Total=3906 [2023-11-29 00:07:56,077 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1291 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1291 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:07:56,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1291 Valid, 87 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 00:07:56,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-11-29 00:07:56,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 310. [2023-11-29 00:07:56,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 308 states have (on average 1.25) internal successors, (385), 309 states have internal predecessors, (385), 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) [2023-11-29 00:07:56,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 385 transitions. [2023-11-29 00:07:56,081 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 385 transitions. Word has length 62 [2023-11-29 00:07:56,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:07:56,082 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 385 transitions. [2023-11-29 00:07:56,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 24 states have internal predecessors, (67), 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) [2023-11-29 00:07:56,082 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 385 transitions. [2023-11-29 00:07:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 00:07:56,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:07:56,083 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:07:56,087 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (32)] Ended with exit code 0 [2023-11-29 00:07:56,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:07:56,284 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:07:56,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:07:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash -957176852, now seen corresponding path program 5 times [2023-11-29 00:07:56,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:07:56,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726875926] [2023-11-29 00:07:56,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:07:56,284 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 [2023-11-29 00:07:56,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:07:56,285 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:07:56,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2023-11-29 00:07:56,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-11-29 00:07:56,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:07:56,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:07:56,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:07:56,786 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 [2023-11-29 00:07:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 132 proven. 118 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-29 00:07:57,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:04,339 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:08:04,339 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:08:04,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726875926] [2023-11-29 00:08:04,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1726875926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:04,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:08:04,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 39 [2023-11-29 00:08:04,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506120225] [2023-11-29 00:08:04,340 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:04,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-29 00:08:04,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:08:04,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-29 00:08:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:08:04,342 INFO L87 Difference]: Start difference. First operand 310 states and 385 transitions. Second operand has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 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) [2023-11-29 00:08:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:08:30,820 INFO L93 Difference]: Finished difference Result 658 states and 783 transitions. [2023-11-29 00:08:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:08:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 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 69 [2023-11-29 00:08:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:08:30,825 INFO L225 Difference]: With dead ends: 658 [2023-11-29 00:08:30,825 INFO L226 Difference]: Without dead ends: 617 [2023-11-29 00:08:30,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=976, Invalid=4724, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 00:08:30,827 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 787 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 2288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:08:30,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [787 Valid, 595 Invalid, 2295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2288 Invalid, 0 Unknown, 0 Unchecked, 14.4s Time] [2023-11-29 00:08:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-11-29 00:08:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 586. [2023-11-29 00:08:30,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 584 states have (on average 1.2226027397260273) internal successors, (714), 585 states have internal predecessors, (714), 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) [2023-11-29 00:08:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 714 transitions. [2023-11-29 00:08:30,840 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 714 transitions. Word has length 69 [2023-11-29 00:08:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:08:30,840 INFO L495 AbstractCegarLoop]: Abstraction has 586 states and 714 transitions. [2023-11-29 00:08:30,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.1538461538461537) internal successors, (123), 39 states have internal predecessors, (123), 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) [2023-11-29 00:08:30,840 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 714 transitions. [2023-11-29 00:08:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 00:08:30,841 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:08:30,842 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:08:30,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (33)] Ended with exit code 0 [2023-11-29 00:08:31,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:08:31,042 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:08:31,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:08:31,043 INFO L85 PathProgramCache]: Analyzing trace with hash 79429214, now seen corresponding path program 6 times [2023-11-29 00:08:31,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:08:31,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190390722] [2023-11-29 00:08:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:08:31,043 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 [2023-11-29 00:08:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:08:31,044 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:08:31,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2023-11-29 00:08:31,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 00:08:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:08:31,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:08:31,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:08:31,766 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 [2023-11-29 00:08:33,846 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 00:08:33,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:08:41,455 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-29 00:08:41,455 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:08:41,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190390722] [2023-11-29 00:08:41,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190390722] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:08:41,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:08:41,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-11-29 00:08:41,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586450630] [2023-11-29 00:08:41,456 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:08:41,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:08:41,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:08:41,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:08:41,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=939, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:08:41,458 INFO L87 Difference]: Start difference. First operand 586 states and 714 transitions. Second operand has 35 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 35 states have internal predecessors, (121), 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) [2023-11-29 00:11:02,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:11:02,858 INFO L93 Difference]: Finished difference Result 931 states and 1123 transitions. [2023-11-29 00:11:02,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2023-11-29 00:11:02,860 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 35 states have internal predecessors, (121), 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 75 [2023-11-29 00:11:02,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:11:02,864 INFO L225 Difference]: With dead ends: 931 [2023-11-29 00:11:02,864 INFO L226 Difference]: Without dead ends: 931 [2023-11-29 00:11:02,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6330 ImplicationChecksByTransitivity, 120.1s TimeCoverageRelationStatistics Valid=4445, Invalid=13377, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 00:11:02,867 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1495 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1495 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 2609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:11:02,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1495 Valid, 490 Invalid, 2609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 2397 Invalid, 0 Unknown, 0 Unchecked, 25.9s Time] [2023-11-29 00:11:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2023-11-29 00:11:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 820. [2023-11-29 00:11:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 818 states have (on average 1.2249388753056234) internal successors, (1002), 819 states have internal predecessors, (1002), 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) [2023-11-29 00:11:02,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1002 transitions. [2023-11-29 00:11:02,886 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1002 transitions. Word has length 75 [2023-11-29 00:11:02,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:11:02,886 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 1002 transitions. [2023-11-29 00:11:02,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 35 states have internal predecessors, (121), 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) [2023-11-29 00:11:02,886 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1002 transitions. [2023-11-29 00:11:02,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 00:11:02,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:11:02,888 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:02,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (34)] Ended with exit code 0 [2023-11-29 00:11:03,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:11:03,089 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:11:03,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:03,089 INFO L85 PathProgramCache]: Analyzing trace with hash -336613184, now seen corresponding path program 10 times [2023-11-29 00:11:03,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:11:03,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [965154981] [2023-11-29 00:11:03,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:11:03,090 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 [2023-11-29 00:11:03,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:11:03,090 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:11:03,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2023-11-29 00:11:03,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:11:03,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:03,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:11:03,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:04,079 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 228 proven. 178 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-29 00:11:04,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 262 proven. 144 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-11-29 00:11:06,617 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:11:06,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [965154981] [2023-11-29 00:11:06,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [965154981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:06,618 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:11:06,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2023-11-29 00:11:06,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060513412] [2023-11-29 00:11:06,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:06,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 00:11:06,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:11:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 00:11:06,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=877, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:11:06,619 INFO L87 Difference]: Start difference. First operand 820 states and 1002 transitions. Second operand has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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) [2023-11-29 00:11:13,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:11:13,261 INFO L93 Difference]: Finished difference Result 987 states and 1182 transitions. [2023-11-29 00:11:13,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 00:11:13,262 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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 89 [2023-11-29 00:11:13,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:11:13,265 INFO L225 Difference]: With dead ends: 987 [2023-11-29 00:11:13,265 INFO L226 Difference]: Without dead ends: 831 [2023-11-29 00:11:13,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=864, Invalid=3558, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 00:11:13,266 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 540 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:11:13,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 312 Invalid, 1404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 00:11:13,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2023-11-29 00:11:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 829. [2023-11-29 00:11:13,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 827 states have (on average 1.218863361547763) internal successors, (1008), 828 states have internal predecessors, (1008), 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) [2023-11-29 00:11:13,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 1008 transitions. [2023-11-29 00:11:13,278 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 1008 transitions. Word has length 89 [2023-11-29 00:11:13,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:11:13,278 INFO L495 AbstractCegarLoop]: Abstraction has 829 states and 1008 transitions. [2023-11-29 00:11:13,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 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) [2023-11-29 00:11:13,278 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 1008 transitions. [2023-11-29 00:11:13,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-11-29 00:11:13,279 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:11:13,280 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:11:13,287 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (35)] Ended with exit code 0 [2023-11-29 00:11:13,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:11:13,482 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:11:13,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:13,482 INFO L85 PathProgramCache]: Analyzing trace with hash 838094796, now seen corresponding path program 11 times [2023-11-29 00:11:13,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:11:13,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520960518] [2023-11-29 00:11:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:11:13,483 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 [2023-11-29 00:11:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:11:13,484 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:11:13,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2023-11-29 00:11:14,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 00:11:14,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:14,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 00:11:14,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 220 proven. 272 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 00:11:15,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:11:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 270 proven. 222 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-29 00:11:18,578 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:11:18,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520960518] [2023-11-29 00:11:18,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520960518] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:11:18,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:11:18,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2023-11-29 00:11:18,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322075728] [2023-11-29 00:11:18,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:11:18,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 00:11:18,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:11:18,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 00:11:18,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:11:18,579 INFO L87 Difference]: Start difference. First operand 829 states and 1008 transitions. Second operand has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 states have internal predecessors, (133), 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) [2023-11-29 00:11:21,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:11:21,889 INFO L93 Difference]: Finished difference Result 1042 states and 1240 transitions. [2023-11-29 00:11:21,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:11:21,890 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 states have internal predecessors, (133), 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 94 [2023-11-29 00:11:21,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:11:21,894 INFO L225 Difference]: With dead ends: 1042 [2023-11-29 00:11:21,894 INFO L226 Difference]: Without dead ends: 932 [2023-11-29 00:11:21,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=336, Invalid=1146, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:11:21,894 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 218 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:11:21,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 384 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 00:11:21,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2023-11-29 00:11:21,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 879. [2023-11-29 00:11:21,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 877 states have (on average 1.2120866590649944) internal successors, (1063), 878 states have internal predecessors, (1063), 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) [2023-11-29 00:11:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 1063 transitions. [2023-11-29 00:11:21,912 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 1063 transitions. Word has length 94 [2023-11-29 00:11:21,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:11:21,912 INFO L495 AbstractCegarLoop]: Abstraction has 879 states and 1063 transitions. [2023-11-29 00:11:21,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.6944444444444446) internal successors, (133), 36 states have internal predecessors, (133), 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) [2023-11-29 00:11:21,913 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 1063 transitions. [2023-11-29 00:11:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-11-29 00:11:21,918 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:11:21,918 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1] [2023-11-29 00:11:21,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (36)] Ended with exit code 0 [2023-11-29 00:11:22,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-29 00:11:22,119 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:11:22,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:11:22,119 INFO L85 PathProgramCache]: Analyzing trace with hash -963981108, now seen corresponding path program 5 times [2023-11-29 00:11:22,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2023-11-29 00:11:22,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004810981] [2023-11-29 00:11:22,120 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:11:22,120 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 [2023-11-29 00:11:22,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat [2023-11-29 00:11:22,121 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -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) [2023-11-29 00:11:22,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d69c9a24-a017-4ae5-a76a-16f1a509ac89/bin/uautomizer-verify-BQ2R08f2Ya/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2023-11-29 00:11:31,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2023-11-29 00:11:31,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:11:31,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 00:11:31,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:11:31,329 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 [2023-11-29 00:11:36,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:11:36,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:12:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2162 backedges. 0 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:12:14,698 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2023-11-29 00:12:14,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004810981] [2023-11-29 00:12:14,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004810981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:12:14,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:12:14,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 99 [2023-11-29 00:12:14,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933992875] [2023-11-29 00:12:14,699 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:12:14,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 00:12:14,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2023-11-29 00:12:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 00:12:14,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2504, Invalid=7396, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 00:12:14,702 INFO L87 Difference]: Start difference. First operand 879 states and 1063 transitions. Second operand has 100 states, 99 states have (on average 1.9494949494949494) internal successors, (193), 100 states have internal predecessors, (193), 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)