./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:55:24,457 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:55:24,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:55:24,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:55:24,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:55:24,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:55:24,493 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:55:24,495 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:55:24,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:55:24,499 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:55:24,500 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:55:24,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:55:24,502 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:55:24,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:55:24,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:55:24,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:55:24,508 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:55:24,509 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:55:24,512 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:55:24,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:55:24,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:55:24,518 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:55:24,520 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:55:24,521 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:55:24,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:55:24,526 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:55:24,526 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:55:24,531 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:55:24,532 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:55:24,533 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:55:24,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:55:24,535 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:55:24,536 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:55:24,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:55:24,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:55:24,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:55:24,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:55:24,540 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:55:24,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:55:24,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:55:24,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:55:24,548 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2021-10-13 07:55:24,592 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:55:24,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:55:24,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:55:24,594 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:55:24,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:55:24,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:55:24,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:55:24,595 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:55:24,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:55:24,595 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:55:24,595 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:55:24,596 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:55:24,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:55:24,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:55:24,596 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:55:24,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:55:24,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:55:24,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:55:24,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:55:24,598 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:55:24,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:55:24,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:55:24,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:55:24,599 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:55:24,599 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:55:24,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:55:24,600 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:55:24,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:55:24,600 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:55:24,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:55:24,601 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:55:24,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:24,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:55:24,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:55:24,602 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:55:24,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:55:24,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:55:24,603 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:55:24,603 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2021-10-13 07:55:24,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:55:24,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:55:24,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:55:24,903 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:55:24,904 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:55:24,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:55:24,974 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/094d6c03d/e824421ede744e599290715a172ba13a/FLAG951cf1a97 [2021-10-13 07:55:25,457 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:55:25,457 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:55:25,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/094d6c03d/e824421ede744e599290715a172ba13a/FLAG951cf1a97 [2021-10-13 07:55:25,809 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/094d6c03d/e824421ede744e599290715a172ba13a [2021-10-13 07:55:25,812 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:55:25,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:55:25,820 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:25,821 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:55:25,824 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:55:25,825 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:25" (1/1) ... [2021-10-13 07:55:25,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bc13708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:25, skipping insertion in model container [2021-10-13 07:55:25,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:25" (1/1) ... [2021-10-13 07:55:25,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:55:25,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:55:26,222 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:55:26,225 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:26,234 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:55:26,304 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:55:26,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:26,336 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:55:26,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26 WrapperNode [2021-10-13 07:55:26,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:26,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:26,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:55:26,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:55:26,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,361 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:26,386 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:55:26,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:55:26,387 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:55:26,395 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,408 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,413 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,415 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:55:26,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:55:26,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:55:26,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:55:26,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (1/1) ... [2021-10-13 07:55:26,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:26,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:26,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:55:26,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:55:26,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 07:55:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:55:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:55:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:55:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:55:26,538 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:55:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:55:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:55:26,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:55:26,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:55:27,204 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:55:27,204 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:55:27,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:27 BoogieIcfgContainer [2021-10-13 07:55:27,207 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:55:27,209 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:55:27,209 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:55:27,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:55:27,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:55:25" (1/3) ... [2021-10-13 07:55:27,214 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fe3552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:27, skipping insertion in model container [2021-10-13 07:55:27,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:26" (2/3) ... [2021-10-13 07:55:27,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68fe3552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:27, skipping insertion in model container [2021-10-13 07:55:27,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:27" (3/3) ... [2021-10-13 07:55:27,217 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-13 07:55:27,222 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:55:27,223 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-10-13 07:55:27,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:55:27,275 INFO L339 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:55:27,276 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-10-13 07:55:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand has 72 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:55:27,298 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:27,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:55:27,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:27,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash 200758, now seen corresponding path program 1 times [2021-10-13 07:55:27,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:27,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734752872] [2021-10-13 07:55:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:27,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:27,553 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:27,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734752872] [2021-10-13 07:55:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734752872] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:27,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:55:27,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725802824] [2021-10-13 07:55:27,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:55:27,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:55:27,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:55:27,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:27,596 INFO L87 Difference]: Start difference. First operand has 72 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 71 states have internal predecessors, (83), 0 states have call successors, (0), 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, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:27,646 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2021-10-13 07:55:27,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:27,649 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-13 07:55:27,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:27,658 INFO L225 Difference]: With dead ends: 95 [2021-10-13 07:55:27,659 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 07:55:27,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 07:55:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-10-13 07:55:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 70 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) [2021-10-13 07:55:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2021-10-13 07:55:27,706 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 3 [2021-10-13 07:55:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:27,707 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2021-10-13 07:55:27,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2021-10-13 07:55:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:55:27,708 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:27,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:55:27,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:55:27,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:27,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:27,711 INFO L82 PathProgramCache]: Analyzing trace with hash 6058691, now seen corresponding path program 1 times [2021-10-13 07:55:27,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:27,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036075494] [2021-10-13 07:55:27,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:27,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:27,762 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:27,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036075494] [2021-10-13 07:55:27,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036075494] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:27,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:27,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:55:27,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142548168] [2021-10-13 07:55:27,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:55:27,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:55:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:55:27,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:27,766 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:27,849 INFO L93 Difference]: Finished difference Result 93 states and 103 transitions. [2021-10-13 07:55:27,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:55:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:27,852 INFO L225 Difference]: With dead ends: 93 [2021-10-13 07:55:27,852 INFO L226 Difference]: Without dead ends: 93 [2021-10-13 07:55:27,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-13 07:55:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2021-10-13 07:55:27,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 36 states have (on average 2.0555555555555554) internal successors, (74), 65 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2021-10-13 07:55:27,860 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 4 [2021-10-13 07:55:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:27,860 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2021-10-13 07:55:27,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2021-10-13 07:55:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:55:27,861 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:27,861 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:55:27,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:55:27,862 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:27,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:27,863 INFO L82 PathProgramCache]: Analyzing trace with hash 6058692, now seen corresponding path program 1 times [2021-10-13 07:55:27,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:27,863 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736810377] [2021-10-13 07:55:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:27,864 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:27,910 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:27,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736810377] [2021-10-13 07:55:27,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736810377] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:27,911 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:27,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:55:27,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444113004] [2021-10-13 07:55:27,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:55:27,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:55:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:55:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:27,913 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:27,972 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-10-13 07:55:27,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:27,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:55:27,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:27,973 INFO L225 Difference]: With dead ends: 61 [2021-10-13 07:55:27,973 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 07:55:27,974 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:27,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 07:55:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-13 07:55:27,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 60 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) [2021-10-13 07:55:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-10-13 07:55:27,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 4 [2021-10-13 07:55:27,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:27,980 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-10-13 07:55:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-10-13 07:55:27,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:55:27,981 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:27,981 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:55:27,981 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash 703284186, now seen corresponding path program 1 times [2021-10-13 07:55:27,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:27,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688113819] [2021-10-13 07:55:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:27,983 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:28,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:28,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688113819] [2021-10-13 07:55:28,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688113819] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:28,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:28,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:55:28,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18188060] [2021-10-13 07:55:28,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:55:28,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:55:28,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:55:28,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:28,078 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:28,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:28,104 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2021-10-13 07:55:28,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:28,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:55:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:28,108 INFO L225 Difference]: With dead ends: 69 [2021-10-13 07:55:28,108 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 07:55:28,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 07:55:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-10-13 07:55:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 67 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) [2021-10-13 07:55:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-10-13 07:55:28,114 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 10 [2021-10-13 07:55:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:28,115 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-10-13 07:55:28,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-10-13 07:55:28,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:55:28,116 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:28,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:28,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:55:28,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:28,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1546396709, now seen corresponding path program 1 times [2021-10-13 07:55:28,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:55:28,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234506688] [2021-10-13 07:55:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:28,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:55:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:28,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:55:28,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234506688] [2021-10-13 07:55:28,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234506688] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:55:28,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896363500] [2021-10-13 07:55:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:28,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:28,247 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:28,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:55:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:28,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:55:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:28,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:28,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:28,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896363500] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:28,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1262041697] [2021-10-13 07:55:28,526 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-10-13 07:55:28,526 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:55:28,531 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:55:28,536 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:55:28,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:55:28,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,598 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:55:28,599 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,600 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-13 07:55:28,601 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:55:28,602 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,603 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-13 07:55:28,611 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 107 [2021-10-13 07:55:28,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:55:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2021-10-13 07:55:28,656 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,657 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:55:28,659 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,660 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-13 07:55:28,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:55:28,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:55:28,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,700 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:55:28,703 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 105 [2021-10-13 07:55:28,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:55:28,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:104, output treesize:105 [2021-10-13 07:55:28,747 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:28,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:28,927 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_72| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:55:28,931 INFO L168 Benchmark]: Toolchain (without parser) took 3114.91 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 87.7 MB in the beginning and 107.3 MB in the end (delta: -19.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:28,931 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 117.4 MB. Free memory is still 69.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:55:28,932 INFO L168 Benchmark]: CACSL2BoogieTranslator took 517.22 ms. Allocated memory is still 117.4 MB. Free memory was 87.7 MB in the beginning and 85.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:28,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.36 ms. Allocated memory is still 117.4 MB. Free memory was 85.0 MB in the beginning and 82.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:28,939 INFO L168 Benchmark]: Boogie Preprocessor took 31.99 ms. Allocated memory is still 117.4 MB. Free memory was 82.9 MB in the beginning and 81.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:28,939 INFO L168 Benchmark]: RCFGBuilder took 788.50 ms. Allocated memory is still 117.4 MB. Free memory was 81.2 MB in the beginning and 60.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:55:28,940 INFO L168 Benchmark]: TraceAbstraction took 1720.21 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 59.8 MB in the beginning and 107.3 MB in the end (delta: -47.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:55:28,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 117.4 MB. Free memory is still 69.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 517.22 ms. Allocated memory is still 117.4 MB. Free memory was 87.7 MB in the beginning and 85.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.36 ms. Allocated memory is still 117.4 MB. Free memory was 85.0 MB in the beginning and 82.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.99 ms. Allocated memory is still 117.4 MB. Free memory was 82.9 MB in the beginning and 81.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 788.50 ms. Allocated memory is still 117.4 MB. Free memory was 81.2 MB in the beginning and 60.2 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1720.21 ms. Allocated memory was 117.4 MB in the beginning and 142.6 MB in the end (delta: 25.2 MB). Free memory was 59.8 MB in the beginning and 107.3 MB in the end (delta: -47.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_72| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_72|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:55:28,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:55:31,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:55:31,485 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:55:31,520 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:55:31,521 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:55:31,523 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:55:31,524 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:55:31,527 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:55:31,529 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:55:31,530 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:55:31,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:55:31,533 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:55:31,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:55:31,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:55:31,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:55:31,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:55:31,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:55:31,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:55:31,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:55:31,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:55:31,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:55:31,550 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:55:31,551 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:55:31,552 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:55:31,556 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:55:31,557 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:55:31,558 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:55:31,559 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:55:31,560 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:55:31,561 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:55:31,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:55:31,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:55:31,563 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:55:31,565 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:55:31,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:55:31,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:55:31,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:55:31,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:55:31,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:55:31,569 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:55:31,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:55:31,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/config/svcomp-MemCleanup-32bit-Taipan_Bitvector.epf [2021-10-13 07:55:31,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:55:31,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:55:31,615 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:55:31,615 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:55:31,615 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:55:31,616 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:55:31,616 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:55:31,616 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:55:31,616 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:55:31,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:55:31,619 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:55:31,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:55:31,620 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:55:31,620 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:55:31,620 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:55:31,621 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:55:31,621 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:55:31,621 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:55:31,621 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:55:31,621 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:55:31,622 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:55:31,622 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:55:31,622 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:55:31,622 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:55:31,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:55:31,623 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:55:31,623 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:55:31,623 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:55:31,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:31,624 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:55:31,624 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:55:31,624 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:55:31,625 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:31,625 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:55:31,626 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:55:31,626 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6bee9027c6ee41df2f7df0c67f6de4e3d806cb7 [2021-10-13 07:55:32,050 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:55:32,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:55:32,078 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:55:32,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:55:32,080 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:55:32,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:55:32,174 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/77498bd2b/e668bd4136c5459bae2a13a25ef82600/FLAG1d835a267 [2021-10-13 07:55:32,832 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:55:32,832 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-13 07:55:32,847 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/77498bd2b/e668bd4136c5459bae2a13a25ef82600/FLAG1d835a267 [2021-10-13 07:55:33,166 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/data/77498bd2b/e668bd4136c5459bae2a13a25ef82600 [2021-10-13 07:55:33,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:55:33,170 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:55:33,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:33,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:55:33,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:55:33,178 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,179 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672b6076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33, skipping insertion in model container [2021-10-13 07:55:33,179 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,187 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:55:33,249 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:55:33,581 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:55:33,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:33,598 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:55:33,657 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-13 07:55:33,666 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:55:33,723 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:55:33,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33 WrapperNode [2021-10-13 07:55:33,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:55:33,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:33,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:55:33,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:55:33,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,771 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,814 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:55:33,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:55:33,816 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:55:33,816 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:55:33,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,826 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,845 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,874 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,878 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,891 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:55:33,892 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:55:33,897 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:55:33,897 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:55:33,898 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (1/1) ... [2021-10-13 07:55:33,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:55:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:33,932 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:55:33,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:55:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 07:55:33,983 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:55:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-13 07:55:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:55:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-13 07:55:33,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:55:33,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:55:33,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:55:33,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:55:33,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:55:34,605 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:55:34,606 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-13 07:55:34,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:34 BoogieIcfgContainer [2021-10-13 07:55:34,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:55:34,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:55:34,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:55:34,615 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:55:34,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:55:33" (1/3) ... [2021-10-13 07:55:34,616 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1289e169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:34, skipping insertion in model container [2021-10-13 07:55:34,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:55:33" (2/3) ... [2021-10-13 07:55:34,617 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1289e169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:55:34, skipping insertion in model container [2021-10-13 07:55:34,617 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:34" (3/3) ... [2021-10-13 07:55:34,619 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-13 07:55:34,625 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:55:34,625 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 35 error locations. [2021-10-13 07:55:34,681 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:55:34,688 INFO L339 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, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 07:55:34,688 INFO L340 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2021-10-13 07:55:34,705 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:55:34,711 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:34,712 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:55:34,712 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:34,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:34,718 INFO L82 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2021-10-13 07:55:34,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:34,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [742043264] [2021-10-13 07:55:34,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:34,731 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:34,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:34,734 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:34,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:55:34,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:34,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:55:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:34,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:34,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:34,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:34,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:34,940 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:34,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [742043264] [2021-10-13 07:55:34,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [742043264] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:34,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:34,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:55:34,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468441764] [2021-10-13 07:55:34,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:55:34,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:34,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:55:34,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:34,971 INFO L87 Difference]: Start difference. First operand has 87 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 86 states have internal predecessors, (101), 0 states have call successors, (0), 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) [2021-10-13 07:55:35,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:35,283 INFO L93 Difference]: Finished difference Result 143 states and 160 transitions. [2021-10-13 07:55:35,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:35,285 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 [2021-10-13 07:55:35,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:35,295 INFO L225 Difference]: With dead ends: 143 [2021-10-13 07:55:35,296 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 07:55:35,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 07:55:35,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 79. [2021-10-13 07:55:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:35,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 88 transitions. [2021-10-13 07:55:35,370 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 88 transitions. Word has length 5 [2021-10-13 07:55:35,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:35,370 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 88 transitions. [2021-10-13 07:55:35,371 INFO L471 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) [2021-10-13 07:55:35,371 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 88 transitions. [2021-10-13 07:55:35,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:55:35,372 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:35,372 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:55:35,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:35,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:55:35,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:35,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:35,584 INFO L82 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2021-10-13 07:55:35,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:35,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959366717] [2021-10-13 07:55:35,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:35,586 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:35,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:35,587 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:35,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:55:35,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:35,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:55:35,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:35,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:35,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:35,860 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:35,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959366717] [2021-10-13 07:55:35,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959366717] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:35,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:35,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:55:35,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737292165] [2021-10-13 07:55:35,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:55:35,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:35,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:55:35,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:35,864 INFO L87 Difference]: Start difference. First operand 79 states and 88 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:36,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:36,237 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2021-10-13 07:55:36,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:36,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:55:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:36,240 INFO L225 Difference]: With dead ends: 133 [2021-10-13 07:55:36,241 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 07:55:36,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 07:55:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2021-10-13 07:55:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.6938775510204083) internal successors, (83), 73 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:36,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2021-10-13 07:55:36,253 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 5 [2021-10-13 07:55:36,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:36,254 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2021-10-13 07:55:36,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:36,254 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2021-10-13 07:55:36,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:55:36,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:36,255 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:55:36,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:36,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:55:36,467 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:36,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:36,468 INFO L82 PathProgramCache]: Analyzing trace with hash 889672534, now seen corresponding path program 1 times [2021-10-13 07:55:36,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:36,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [963397441] [2021-10-13 07:55:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:36,469 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:36,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:36,470 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:36,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:55:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:36,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:36,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:36,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:36,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:36,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [963397441] [2021-10-13 07:55:36,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [963397441] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:36,605 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:36,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:55:36,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913285578] [2021-10-13 07:55:36,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:55:36,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:36,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:55:36,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:36,612 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:36,655 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2021-10-13 07:55:36,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:55:36,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-13 07:55:36,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:36,661 INFO L225 Difference]: With dead ends: 89 [2021-10-13 07:55:36,661 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 07:55:36,662 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:55:36,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 07:55:36,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-10-13 07:55:36,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 86 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 100 transitions. [2021-10-13 07:55:36,682 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 100 transitions. Word has length 6 [2021-10-13 07:55:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:36,682 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 100 transitions. [2021-10-13 07:55:36,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 100 transitions. [2021-10-13 07:55:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 07:55:36,684 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:36,684 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:36,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:36,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:55:36,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:36,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:36,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1233220919, now seen corresponding path program 1 times [2021-10-13 07:55:36,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:36,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446837545] [2021-10-13 07:55:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:36,887 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:36,890 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:36,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:55:36,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:36,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:55:36,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:37,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:37,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:37,269 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:37,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446837545] [2021-10-13 07:55:37,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446837545] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:55:37,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:55:37,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-13 07:55:37,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651660263] [2021-10-13 07:55:37,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:55:37,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:55:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:37,273 INFO L87 Difference]: Start difference. First operand 87 states and 100 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:37,332 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2021-10-13 07:55:37,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:55:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-13 07:55:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:37,336 INFO L225 Difference]: With dead ends: 87 [2021-10-13 07:55:37,336 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 07:55:37,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:55:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 07:55:37,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2021-10-13 07:55:37,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 85 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2021-10-13 07:55:37,352 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 13 [2021-10-13 07:55:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:37,353 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2021-10-13 07:55:37,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:55:37,363 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2021-10-13 07:55:37,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:55:37,364 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:37,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:37,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:55:37,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1793437347, now seen corresponding path program 1 times [2021-10-13 07:55:37,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:37,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [924979130] [2021-10-13 07:55:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:37,577 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:37,580 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:37,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:55:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:37,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:55:37,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:37,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:37,879 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:55:37,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-10-13 07:55:37,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:37,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:38,094 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:38,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [924979130] [2021-10-13 07:55:38,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [924979130] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:38,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [967827651] [2021-10-13 07:55:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:38,106 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:38,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:55:38,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:55:38,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 07:55:38,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:38,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:55:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:38,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:38,477 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-13 07:55:38,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-10-13 07:55:38,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:38,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:38,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [967827651] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:38,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767146568] [2021-10-13 07:55:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:38,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:38,656 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:38,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 07:55:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:38,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:55:38,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:38,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:38,876 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-13 07:55:38,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-10-13 07:55:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:39,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:45,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767146568] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:45,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:55:45,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3, 3, 4, 4] total 6 [2021-10-13 07:55:45,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799725211] [2021-10-13 07:55:45,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 07:55:45,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:55:45,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 07:55:45,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=25, Unknown=2, NotChecked=0, Total=42 [2021-10-13 07:55:45,955 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 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) [2021-10-13 07:55:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:55:46,433 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2021-10-13 07:55:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 07:55:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 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) Word has length 24 [2021-10-13 07:55:46,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:55:46,435 INFO L225 Difference]: With dead ends: 117 [2021-10-13 07:55:46,436 INFO L226 Difference]: Without dead ends: 117 [2021-10-13 07:55:46,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 6641.5ms TimeCoverageRelationStatistics Valid=29, Invalid=41, Unknown=2, NotChecked=0, Total=72 [2021-10-13 07:55:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-10-13 07:55:46,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 85. [2021-10-13 07:55:46,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 84 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) [2021-10-13 07:55:46,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2021-10-13 07:55:46,445 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 24 [2021-10-13 07:55:46,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:55:46,445 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2021-10-13 07:55:46,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 9.333333333333334) internal successors, (56), 7 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) [2021-10-13 07:55:46,446 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2021-10-13 07:55:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 07:55:46,447 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:55:46,447 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:55:46,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:46,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 07:55:46,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:55:47,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:47,048 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:55:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:55:47,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1793437348, now seen corresponding path program 1 times [2021-10-13 07:55:47,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:55:47,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2019462085] [2021-10-13 07:55:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:47,050 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:55:47,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:55:47,051 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:55:47,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 07:55:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:47,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:55:47,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:47,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:47,448 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:55:47,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-13 07:55:47,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:47,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:48,142 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:55:48,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2019462085] [2021-10-13 07:55:48,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2019462085] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:48,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1128211696] [2021-10-13 07:55:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:48,142 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:55:48,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:55:48,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:55:48,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 07:55:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:48,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:55:48,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:48,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:48,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:48,758 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:55:48,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-10-13 07:55:48,778 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:55:48,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-10-13 07:55:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:49,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:55:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:54,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1128211696] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:55:54,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235490684] [2021-10-13 07:55:54,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:55:54,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:55:54,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:55:54,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:55:54,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 07:55:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:55:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 07:55:54,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:55:54,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:55:54,927 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-13 07:55:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-10-13 07:55:54,943 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:55:54,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-10-13 07:55:55,241 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:55:55,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:00,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235490684] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:00,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:56:00,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4, 4, 4, 4] total 11 [2021-10-13 07:56:00,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575764079] [2021-10-13 07:56:00,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 07:56:00,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:00,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 07:56:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=90, Unknown=2, NotChecked=0, Total=132 [2021-10-13 07:56:00,256 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:00,942 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2021-10-13 07:56:00,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:56:00,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 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 24 [2021-10-13 07:56:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:00,944 INFO L225 Difference]: With dead ends: 116 [2021-10-13 07:56:00,944 INFO L226 Difference]: Without dead ends: 116 [2021-10-13 07:56:00,945 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 9160.7ms TimeCoverageRelationStatistics Valid=75, Invalid=133, Unknown=2, NotChecked=0, Total=210 [2021-10-13 07:56:00,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-13 07:56:00,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 84. [2021-10-13 07:56:00,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.540983606557377) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:00,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2021-10-13 07:56:00,953 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 24 [2021-10-13 07:56:00,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:00,954 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2021-10-13 07:56:00,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 12 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:00,954 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2021-10-13 07:56:00,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:56:00,955 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:00,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 07:56:00,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:01,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-10-13 07:56:01,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:01,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:01,559 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:56:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:01,559 INFO L82 PathProgramCache]: Analyzing trace with hash 371932886, now seen corresponding path program 1 times [2021-10-13 07:56:01,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:01,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399964280] [2021-10-13 07:56:01,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:01,560 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:01,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:01,561 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:01,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:56:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:01,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:56:01,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:01,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:01,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:02,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:02,093 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:02,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399964280] [2021-10-13 07:56:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399964280] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:02,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1105218592] [2021-10-13 07:56:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:02,094 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:02,099 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:02,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:56:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:02,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:56:02,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:02,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:02,709 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:02,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1105218592] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:02,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437382914] [2021-10-13 07:56:02,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:02,709 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:02,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:56:02,715 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:56:02,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 07:56:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:03,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:56:03,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:03,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:03,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437382914] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:03,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:56:03,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-13 07:56:03,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616570696] [2021-10-13 07:56:03,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:56:03,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:56:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:56:03,266 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:03,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:03,451 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2021-10-13 07:56:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:56:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 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 [2021-10-13 07:56:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:03,453 INFO L225 Difference]: With dead ends: 84 [2021-10-13 07:56:03,453 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 07:56:03,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:56:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 07:56:03,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-13 07:56:03,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 83 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:03,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 93 transitions. [2021-10-13 07:56:03,458 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 93 transitions. Word has length 28 [2021-10-13 07:56:03,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:03,458 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 93 transitions. [2021-10-13 07:56:03,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:03,458 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 93 transitions. [2021-10-13 07:56:03,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:56:03,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:03,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:56:03,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:03,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:03,862 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 07:56:04,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:04,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:56:04,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:04,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1632786717, now seen corresponding path program 1 times [2021-10-13 07:56:04,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:04,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170244926] [2021-10-13 07:56:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:04,062 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:04,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:04,063 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:04,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 07:56:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:04,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:04,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:04,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:04,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:04,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170244926] [2021-10-13 07:56:04,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170244926] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:04,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2091587288] [2021-10-13 07:56:04,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:04,690 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:04,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:04,696 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:04,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 07:56:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:05,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:05,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:05,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:05,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2091587288] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:05,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785387400] [2021-10-13 07:56:05,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:05,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:05,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:56:05,399 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:56:05,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 07:56:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:05,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:56:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:05,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:56:06,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:56:06,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:56:06,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785387400] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:56:06,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:56:06,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 12 [2021-10-13 07:56:06,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484701205] [2021-10-13 07:56:06,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:56:06,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:06,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:56:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:56:06,148 INFO L87 Difference]: Start difference. First operand 84 states and 93 transitions. Second operand has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 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) [2021-10-13 07:56:06,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:06,900 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2021-10-13 07:56:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:56:06,901 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 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 29 [2021-10-13 07:56:06,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:06,902 INFO L225 Difference]: With dead ends: 105 [2021-10-13 07:56:06,902 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 07:56:06,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:56:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 07:56:06,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2021-10-13 07:56:06,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 64 states have (on average 1.421875) internal successors, (91), 78 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:06,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2021-10-13 07:56:06,906 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 29 [2021-10-13 07:56:06,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:06,907 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2021-10-13 07:56:06,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.8) internal successors, (29), 6 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) [2021-10-13 07:56:06,907 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2021-10-13 07:56:06,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 07:56:06,908 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:06,909 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:56:06,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Ended with exit code 0 [2021-10-13 07:56:07,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:07,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:07,512 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:56:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1632786716, now seen corresponding path program 1 times [2021-10-13 07:56:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:07,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765824647] [2021-10-13 07:56:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:07,513 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:07,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:07,515 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:07,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 07:56:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:07,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:07,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:08,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:08,245 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:08,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765824647] [2021-10-13 07:56:08,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765824647] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:08,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [685773722] [2021-10-13 07:56:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:08,246 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:08,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:08,247 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:08,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 07:56:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:08,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:08,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:08,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:09,091 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:09,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [685773722] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:09,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81166562] [2021-10-13 07:56:09,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:09,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:09,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:56:09,094 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:56:09,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 07:56:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:09,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:56:09,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:09,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:56:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:56:09,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:10,510 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:56:10,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81166562] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:56:10,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 07:56:10,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [5, 5, 5, 5] total 16 [2021-10-13 07:56:10,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406681044] [2021-10-13 07:56:10,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:56:10,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:10,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:56:10,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:56:10,513 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 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) [2021-10-13 07:56:11,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:11,513 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2021-10-13 07:56:11,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 07:56:11,520 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 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 29 [2021-10-13 07:56:11,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:11,521 INFO L225 Difference]: With dead ends: 138 [2021-10-13 07:56:11,521 INFO L226 Difference]: Without dead ends: 138 [2021-10-13 07:56:11,521 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 834.6ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-10-13 07:56:11,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-10-13 07:56:11,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2021-10-13 07:56:11,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.367816091954023) internal successors, (119), 100 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) [2021-10-13 07:56:11,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2021-10-13 07:56:11,526 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 29 [2021-10-13 07:56:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:11,527 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2021-10-13 07:56:11,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.0) internal successors, (45), 10 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) [2021-10-13 07:56:11,527 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2021-10-13 07:56:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 07:56:11,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:11,528 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:56:11,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 07:56:11,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:11,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:12,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:56:12,155 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:56:12,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:12,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1342498124, now seen corresponding path program 1 times [2021-10-13 07:56:12,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:12,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180559179] [2021-10-13 07:56:12,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:12,156 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:12,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:12,157 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:12,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 07:56:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:12,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:12,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:12,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:12,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:12,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:12,896 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:12,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180559179] [2021-10-13 07:56:12,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180559179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:12,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [6262053] [2021-10-13 07:56:12,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:12,897 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:12,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:12,915 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:12,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 07:56:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:13,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:56:13,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:56:13,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 07:56:13,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [6262053] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:56:13,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:56:13,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [5, 5] total 12 [2021-10-13 07:56:13,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908607728] [2021-10-13 07:56:13,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:56:13,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:56:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:56:13,749 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:14,331 INFO L93 Difference]: Finished difference Result 110 states and 127 transitions. [2021-10-13 07:56:14,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:56:14,332 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-13 07:56:14,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:14,333 INFO L225 Difference]: With dead ends: 110 [2021-10-13 07:56:14,333 INFO L226 Difference]: Without dead ends: 110 [2021-10-13 07:56:14,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-10-13 07:56:14,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-13 07:56:14,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2021-10-13 07:56:14,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.3563218390804597) internal successors, (118), 100 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:14,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 118 transitions. [2021-10-13 07:56:14,339 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 118 transitions. Word has length 33 [2021-10-13 07:56:14,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:14,339 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 118 transitions. [2021-10-13 07:56:14,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:14,340 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 118 transitions. [2021-10-13 07:56:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 07:56:14,341 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:14,341 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:56:14,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:14,544 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-13 07:56:14,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:14,742 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:56:14,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:14,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1058300424, now seen corresponding path program 1 times [2021-10-13 07:56:14,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:14,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [954785278] [2021-10-13 07:56:14,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:14,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:14,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:14,745 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:14,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-10-13 07:56:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:15,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:15,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:15,528 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:15,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [954785278] [2021-10-13 07:56:15,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [954785278] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:15,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [960640932] [2021-10-13 07:56:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:15,529 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:15,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:15,535 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:15,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-10-13 07:56:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:16,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:56:16,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:16,294 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:16,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:16,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [960640932] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:16,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213853481] [2021-10-13 07:56:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:56:16,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:16,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:56:16,475 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:56:16,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 07:56:16,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:56:16,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:56:16,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:17,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:56:17,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213853481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:17,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:56:17,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-10-13 07:56:17,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313990813] [2021-10-13 07:56:17,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 07:56:17,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:56:17,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 07:56:17,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:56:17,412 INFO L87 Difference]: Start difference. First operand 101 states and 118 transitions. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:56:17,599 INFO L93 Difference]: Finished difference Result 137 states and 157 transitions. [2021-10-13 07:56:17,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:56:17,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 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 37 [2021-10-13 07:56:17,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:56:17,602 INFO L225 Difference]: With dead ends: 137 [2021-10-13 07:56:17,603 INFO L226 Difference]: Without dead ends: 137 [2021-10-13 07:56:17,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-10-13 07:56:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-10-13 07:56:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2021-10-13 07:56:17,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 123 states have (on average 1.2764227642276422) internal successors, (157), 136 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2021-10-13 07:56:17,607 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 37 [2021-10-13 07:56:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:56:17,607 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2021-10-13 07:56:17,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:56:17,608 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2021-10-13 07:56:17,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-13 07:56:17,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:56:17,610 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:56:17,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:17,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-10-13 07:56:18,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-10-13 07:56:18,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:56:18,214 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:56:18,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:56:18,214 INFO L82 PathProgramCache]: Analyzing trace with hash 395073651, now seen corresponding path program 2 times [2021-10-13 07:56:18,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:56:18,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [756348268] [2021-10-13 07:56:18,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:56:18,215 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:56:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:56:18,216 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:56:18,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-13 07:56:18,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:56:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:56:18,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:56:18,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:19,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:56:19,149 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:56:19,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-13 07:56:19,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:56:19,237 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-13 07:56:19,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:56:19,348 INFO L354 Elim1Store]: treesize reduction 56, result has 23.3 percent of original size [2021-10-13 07:56:19,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:56:19,414 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:56:19,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:56:19,497 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-13 07:56:19,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:56:19,588 INFO L354 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2021-10-13 07:56:19,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:56:19,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 07:56:19,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 10 [2021-10-13 07:56:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:56:19,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:20,198 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:20,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:56:34,335 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:34,336 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-13 07:56:36,351 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:36,363 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:36,363 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:56:38,380 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_3) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:40,440 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_3) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:42,487 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32)) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_3) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_2)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_1))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 4 refuted. 2 times theorem prover too weak. 37 trivial. 6 not checked. [2021-10-13 07:56:43,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:56:43,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [756348268] [2021-10-13 07:56:43,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [756348268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:43,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1209798406] [2021-10-13 07:56:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:56:43,503 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:56:43,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:56:43,504 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:56:43,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-10-13 07:56:44,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:56:44,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:56:44,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:56:44,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:56:44,662 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:56:44,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 07:56:44,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:56:44,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:44,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:56:44,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:44,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:44,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:44,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:56:44,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:56:45,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:56:45,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:45,126 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:56:45,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:56:45,486 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:45,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 07:56:45,512 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:56:45,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:45,591 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:45,592 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:56:47,603 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_4 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_4)) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset))) is different from false [2021-10-13 07:56:47,628 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:47,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-13 07:56:49,641 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_4))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:49,653 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:49,654 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:56:51,670 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_6) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_4))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:53,722 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_6) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_4))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:55,776 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_6 (_ BitVec 32)) (v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32)) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_6) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_5)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_4))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:56:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 8 not checked. [2021-10-13 07:56:55,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1209798406] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:56:55,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270037390] [2021-10-13 07:56:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:56:55,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:56:55,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:56:55,969 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:56:55,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 07:56:56,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:56:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:56:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:56:56,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:56:56,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:56:56,788 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:56:56,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-13 07:56:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:56:56,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:56:56,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:56:56,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:56:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:56,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:57,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:57,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:56:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:56:57,100 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:56:57,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:56:57,210 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:57,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 07:56:57,227 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:56:57,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:56:57,315 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:57,316 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:56:59,324 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_7)) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset))) is different from false [2021-10-13 07:56:59,342 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:56:59,344 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-13 07:57:01,362 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_7))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:57:01,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:01,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:57:03,390 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_9) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_7))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:57:05,450 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_9) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_7))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:57:07,495 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32)) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_9) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_8)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_7))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset))) is different from false [2021-10-13 07:57:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 8 not checked. [2021-10-13 07:57:07,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270037390] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:07,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:57:07,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13, 16, 13, 16] total 39 [2021-10-13 07:57:07,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960516663] [2021-10-13 07:57:07,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 07:57:07,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:57:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 07:57:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=526, Unknown=19, NotChecked=826, Total=1482 [2021-10-13 07:57:07,746 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:33,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:57:33,912 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2021-10-13 07:57:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 07:57:33,913 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 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 73 [2021-10-13 07:57:33,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:57:33,915 INFO L225 Difference]: With dead ends: 175 [2021-10-13 07:57:33,915 INFO L226 Difference]: Without dead ends: 175 [2021-10-13 07:57:33,918 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 395 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 14 IntricatePredicates, 2 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 65370.0ms TimeCoverageRelationStatistics Valid=415, Invalid=1426, Unknown=21, NotChecked=1330, Total=3192 [2021-10-13 07:57:33,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-13 07:57:33,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2021-10-13 07:57:33,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 123 states have (on average 1.2682926829268293) internal successors, (156), 136 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:33,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2021-10-13 07:57:33,924 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 73 [2021-10-13 07:57:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:57:33,925 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2021-10-13 07:57:33,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 39 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:57:33,925 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2021-10-13 07:57:33,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 07:57:33,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:57:33,927 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:57:33,944 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-10-13 07:57:34,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-10-13 07:57:34,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-13 07:57:34,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:57:34,545 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:57:34,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:57:34,545 INFO L82 PathProgramCache]: Analyzing trace with hash -959521032, now seen corresponding path program 1 times [2021-10-13 07:57:34,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:57:34,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89182467] [2021-10-13 07:57:34,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:34,546 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:57:34,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:57:34,547 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:57:34,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-10-13 07:57:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:35,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:57:35,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:35,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:57:35,613 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:57:35,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-13 07:57:35,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:57:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:35,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:57:35,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:35,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 07:57:35,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:35,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 07:57:35,861 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-13 07:57:35,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-10-13 07:57:36,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:57:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:57:36,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:36,417 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:36,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:57:38,426 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_10)) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:57:38,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:38,444 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:57:40,456 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_11)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_10))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:57:40,468 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:40,469 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:57:42,487 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_12) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_11)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_10))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:57:44,524 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_10 (_ BitVec 32)) (v_DerPreprocessor_11 (_ BitVec 32)) (v_DerPreprocessor_12 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_12) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_11)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_10))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:57:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 7 not checked. [2021-10-13 07:57:47,566 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:57:47,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89182467] [2021-10-13 07:57:47,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89182467] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:57:47,566 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014340855] [2021-10-13 07:57:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:57:47,567 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:57:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:57:47,574 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:57:47,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-10-13 07:57:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:57:48,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:57:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:57:48,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:57:49,015 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:57:49,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 07:57:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:57:49,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:49,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:57:49,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:49,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 07:57:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:57:49,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 07:57:49,189 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-13 07:57:49,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-10-13 07:57:49,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:57:49,310 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:57:49,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:57:49,386 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:57:49,387 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:58:02,944 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:02,944 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:58:04,958 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_14)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_13))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)))) is different from false [2021-10-13 07:58:04,969 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:04,970 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:58:06,994 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_15) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_14)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_13))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:58:09,029 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (v_DerPreprocessor_14 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_15 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_15) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_14)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_13))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:58:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 5 refuted. 2 times theorem prover too weak. 37 trivial. 5 not checked. [2021-10-13 07:58:09,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014340855] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:58:09,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080549366] [2021-10-13 07:58:09,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:58:09,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:58:09,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:58:09,354 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:58:09,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 07:58:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:58:10,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:58:10,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:58:10,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:58:10,316 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:58:10,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-13 07:58:10,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:58:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:10,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:58:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:10,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 07:58:10,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:58:10,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-10-13 07:58:10,494 INFO L354 Elim1Store]: treesize reduction 41, result has 18.0 percent of original size [2021-10-13 07:58:10,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-10-13 07:58:10,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-13 07:58:10,626 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:58:10,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:58:10,729 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:10,730 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-13 07:58:18,977 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:18,978 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 07:58:20,991 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_13 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_17)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_13))) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32))) is different from false [2021-10-13 07:58:21,005 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:58:21,006 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:59:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 5 refuted. 6 times theorem prover too weak. 37 trivial. 1 not checked. [2021-10-13 07:59:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080549366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:59:06,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:59:06,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 13, 16, 13, 16] total 29 [2021-10-13 07:59:06,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774187990] [2021-10-13 07:59:06,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 07:59:06,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:59:06,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 07:59:06,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=32, NotChecked=360, Total=812 [2021-10-13 07:59:06,802 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:59:21,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:59:21,279 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2021-10-13 07:59:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 07:59:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 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 [2021-10-13 07:59:21,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:59:21,281 INFO L225 Difference]: With dead ends: 175 [2021-10-13 07:59:21,281 INFO L226 Difference]: Without dead ends: 175 [2021-10-13 07:59:21,282 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 417 SyntacticMatches, 10 SemanticMatches, 44 ConstructedPredicates, 8 IntricatePredicates, 2 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 95447.8ms TimeCoverageRelationStatistics Valid=324, Invalid=1081, Unknown=33, NotChecked=632, Total=2070 [2021-10-13 07:59:21,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-10-13 07:59:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2021-10-13 07:59:21,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 123 states have (on average 1.2601626016260163) internal successors, (155), 136 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:59:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 155 transitions. [2021-10-13 07:59:21,287 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 155 transitions. Word has length 75 [2021-10-13 07:59:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:59:21,287 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 155 transitions. [2021-10-13 07:59:21,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.103448275862069) internal successors, (90), 29 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:59:21,288 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 155 transitions. [2021-10-13 07:59:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 07:59:21,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:59:21,289 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:59:21,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-10-13 07:59:21,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-10-13 07:59:21,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (29)] Ended with exit code 0 [2021-10-13 07:59:21,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:59:21,903 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 07:59:21,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:59:21,903 INFO L82 PathProgramCache]: Analyzing trace with hash -18965013, now seen corresponding path program 1 times [2021-10-13 07:59:21,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:59:21,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156869807] [2021-10-13 07:59:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:21,904 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:59:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:59:21,905 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:59:21,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-10-13 07:59:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:59:22,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:59:22,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:59:23,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:59:23,152 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:59:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-10-13 07:59:23,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:59:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:23,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:59:23,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:23,412 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 07:59:23,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-10-13 07:59:23,715 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:59:23,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 21 [2021-10-13 07:59:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:59:23,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:59:25,993 WARN L838 $PredicateComparison]: unable to prove that (forall ((ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) c_ULTIMATE.start_dll_create_~new_head~0.base)) c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset)) (_ bv0 32)))) is different from false [2021-10-13 07:59:35,193 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 2 not checked. [2021-10-13 07:59:35,193 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:59:35,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156869807] [2021-10-13 07:59:35,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156869807] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:59:35,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [509718966] [2021-10-13 07:59:35,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:35,194 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:59:35,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:59:35,199 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:59:35,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-10-13 07:59:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:59:36,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 07:59:36,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:59:36,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-10-13 07:59:36,749 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:59:36,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-10-13 07:59:36,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-13 07:59:36,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:36,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-10-13 07:59:37,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-10-13 07:59:37,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:59:37,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-13 07:59:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:37,156 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-13 07:59:37,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-13 07:59:37,537 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:59:37,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-10-13 07:59:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:59:37,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:59:37,953 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:59:37,954 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 17 [2021-10-13 07:59:39,960 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (_ bv0 32) (select (select (store |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_19)) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset))) is different from false [2021-10-13 07:59:39,974 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:59:39,974 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 37 [2021-10-13 07:59:41,990 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_20)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_19))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:59:41,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:59:42,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-10-13 07:59:44,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_21) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_20)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_19))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:59:46,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_21) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_20)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_19))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:59:48,085 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_19 (_ BitVec 32)) (|ULTIMATE.start_dll_create_#t~ite7| (_ BitVec 32)) (v_DerPreprocessor_20 (_ BitVec 32)) (v_DerPreprocessor_21 (_ BitVec 32)) (ULTIMATE.start_dll_create_~head~0.offset (_ BitVec 32))) (= (select (select (let ((.cse0 (store |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base (store (store (store (store (select |c_#memory_int| c_ULTIMATE.start_dll_create_~new_head~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32)) (bvadd (_ bv16 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) |ULTIMATE.start_dll_create_#t~ite7|) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_create_~new_head~0.offset) v_DerPreprocessor_21) (bvadd c_ULTIMATE.start_dll_create_~new_head~0.offset (_ bv12 32)) v_DerPreprocessor_20)))) (store .cse0 c_ULTIMATE.start_dll_create_~head~0.base (store (select .cse0 c_ULTIMATE.start_dll_create_~head~0.base) (bvadd ULTIMATE.start_dll_create_~head~0.offset (_ bv12 32)) v_DerPreprocessor_19))) c_ULTIMATE.start_dll_create_~new_head~0.base) c_ULTIMATE.start_dll_create_~new_head~0.offset) (_ bv0 32))) is different from false [2021-10-13 07:59:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 8 not checked. [2021-10-13 07:59:50,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [509718966] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:59:50,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955410772] [2021-10-13 07:59:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:59:50,349 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:59:50,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:59:50,350 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:59:50,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 07:59:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:59:51,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:59:51,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:59:51,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-13 07:59:51,447 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-13 07:59:51,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-10-13 07:59:51,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-13 07:59:51,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:51,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-10-13 07:59:51,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:59:51,635 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-10-13 07:59:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 42 [2021-10-13 07:59:51,809 INFO L354 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2021-10-13 07:59:51,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 21 [2021-10-13 07:59:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 12 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-10-13 07:59:51,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:59:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 10 refuted. 0 times theorem prover too weak. 37 trivial. 2 not checked. [2021-10-13 07:59:52,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955410772] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:59:52,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:59:52,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13, 16, 12, 12] total 42 [2021-10-13 07:59:52,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717816283] [2021-10-13 07:59:52,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-13 07:59:52,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:59:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-13 07:59:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1149, Unknown=11, NotChecked=438, Total=1722 [2021-10-13 07:59:52,156 INFO L87 Difference]: Start difference. First operand 137 states and 155 transitions. Second operand has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:00:37,696 WARN L207 SmtUtils]: Spent 10.62 s on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-10-13 08:02:00,120 WARN L207 SmtUtils]: Spent 9.84 s on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-10-13 08:02:36,318 WARN L207 SmtUtils]: Spent 5.66 s on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-10-13 08:02:39,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:39,150 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2021-10-13 08:02:39,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 08:02:39,151 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 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 76 [2021-10-13 08:02:39,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:39,152 INFO L225 Difference]: With dead ends: 133 [2021-10-13 08:02:39,152 INFO L226 Difference]: Without dead ends: 133 [2021-10-13 08:02:39,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 409 SyntacticMatches, 6 SemanticMatches, 62 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 143565.6ms TimeCoverageRelationStatistics Valid=596, Invalid=2691, Unknown=43, NotChecked=702, Total=4032 [2021-10-13 08:02:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-10-13 08:02:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2021-10-13 08:02:39,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 109 states have (on average 1.2568807339449541) internal successors, (137), 122 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2021-10-13 08:02:39,158 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 76 [2021-10-13 08:02:39,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:39,159 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2021-10-13 08:02:39,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2857142857142856) internal successors, (138), 42 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:39,159 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2021-10-13 08:02:39,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 08:02:39,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:39,160 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:39,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:39,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:39,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-10-13 08:02:39,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:39,761 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 31 more)] === [2021-10-13 08:02:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1319834141, now seen corresponding path program 1 times [2021-10-13 08:02:39,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:02:39,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [285949528] [2021-10-13 08:02:39,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:39,763 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:02:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:02:39,764 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:02:39,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-10-13 08:02:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:02:41,048 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:02:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:02:41,624 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:02:41,624 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:02:41,625 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 08:02:41,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 08:02:41,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 08:02:41,627 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-13 08:02:41,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 08:02:41,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 08:02:41,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-13 08:02:41,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-13 08:02:41,628 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-13 08:02:41,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-13 08:02:41,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-13 08:02:41,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-13 08:02:41,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-13 08:02:41,629 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-13 08:02:41,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-13 08:02:41,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-13 08:02:41,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-13 08:02:41,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-13 08:02:41,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-13 08:02:41,630 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-13 08:02:41,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-13 08:02:41,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-13 08:02:41,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-13 08:02:41,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-13 08:02:41,631 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-13 08:02:41,632 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-13 08:02:41,632 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-13 08:02:41,632 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-13 08:02:41,632 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-13 08:02:41,632 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-13 08:02:41,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-13 08:02:41,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:02:41,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:02:41,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 08:02:41,633 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 08:02:41,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-10-13 08:02:41,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:02:41,859 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:02:41,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:02:41 BoogieIcfgContainer [2021-10-13 08:02:41,965 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:02:41,966 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:02:41,966 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:02:41,967 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:02:41,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:55:34" (3/4) ... [2021-10-13 08:02:41,969 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:02:42,072 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:02:42,073 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:02:42,074 INFO L168 Benchmark]: Toolchain (without parser) took 428903.06 ms. Allocated memory was 50.3 MB in the beginning and 266.3 MB in the end (delta: 216.0 MB). Free memory was 25.8 MB in the beginning and 94.7 MB in the end (delta: -68.9 MB). Peak memory consumption was 148.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,074 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 50.3 MB. Free memory was 31.6 MB in the beginning and 31.6 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:02:42,075 INFO L168 Benchmark]: CACSL2BoogieTranslator took 552.16 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 25.6 MB in the beginning and 46.6 MB in the end (delta: -21.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,075 INFO L168 Benchmark]: Boogie Procedure Inliner took 88.60 ms. Allocated memory is still 67.1 MB. Free memory was 46.6 MB in the beginning and 44.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,076 INFO L168 Benchmark]: Boogie Preprocessor took 75.31 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 42.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,077 INFO L168 Benchmark]: RCFGBuilder took 716.72 ms. Allocated memory is still 67.1 MB. Free memory was 42.4 MB in the beginning and 40.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,078 INFO L168 Benchmark]: TraceAbstraction took 427354.61 ms. Allocated memory was 67.1 MB in the beginning and 266.3 MB in the end (delta: 199.2 MB). Free memory was 39.7 MB in the beginning and 99.9 MB in the end (delta: -60.2 MB). Peak memory consumption was 137.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,078 INFO L168 Benchmark]: Witness Printer took 106.58 ms. Allocated memory is still 266.3 MB. Free memory was 99.9 MB in the beginning and 94.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:02:42,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 50.3 MB. Free memory was 31.6 MB in the beginning and 31.6 MB in the end (delta: 33.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 552.16 ms. Allocated memory was 50.3 MB in the beginning and 67.1 MB in the end (delta: 16.8 MB). Free memory was 25.6 MB in the beginning and 46.6 MB in the end (delta: -21.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 88.60 ms. Allocated memory is still 67.1 MB. Free memory was 46.6 MB in the beginning and 44.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.31 ms. Allocated memory is still 67.1 MB. Free memory was 44.3 MB in the beginning and 42.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 716.72 ms. Allocated memory is still 67.1 MB. Free memory was 42.4 MB in the beginning and 40.2 MB in the end (delta: 2.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 427354.61 ms. Allocated memory was 67.1 MB in the beginning and 266.3 MB in the end (delta: 199.2 MB). Free memory was 39.7 MB in the beginning and 99.9 MB in the end (delta: -60.2 MB). Peak memory consumption was 137.2 MB. Max. memory is 16.1 GB. * Witness Printer took 106.58 ms. Allocated memory is still 266.3 MB. Free memory was 99.9 MB in the beginning and 94.7 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 585]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 588]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 602]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 605]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 608]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 87 locations, 35 error locations. Started 1 CEGAR loops. OverallTime: 427178.9ms, OverallIterations: 15, TraceHistogramMax: 5, EmptinessCheckTime: 25.8ms, AutomataDifference: 212395.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 965 SDtfs, 4186 SDslu, 3439 SDs, 0 SdLazy, 2802 SolverSat, 270 SolverUnsat, 22 SolverUnknown, 0 SolverNotchecked, 56587.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2598 GetRequests, 2322 SyntacticMatches, 32 SemanticMatches, 244 ConstructedPredicates, 28 IntricatePredicates, 6 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 321796.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=11, InterpolantAutomatonStates: 123, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 155.6ms AutomataMinimizationTime, 14 MinimizatonAttempts, 343 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 485.0ms SsaConstructionTime, 4706.7ms SatisfiabilityAnalysisTime, 189412.6ms InterpolantComputationTime, 1357 NumberOfCodeBlocks, 1357 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 2494 ConstructedInterpolants, 167 QuantifiedInterpolants, 15818 SizeOfPredicates, 221 NumberOfNonLiveVariables, 5875 ConjunctsInSsa, 296 ConjunctsInUnsatCore, 66 InterpolantComputations, 14 PerfectInterpolantSequences, 2084/2662 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 08:02:42,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_17c9fe1b-38bd-4c11-a422-8eab21044d8c/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...