./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c82ac198a2cdefe88b8a30e2f9953153e9db943 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8c82ac198a2cdefe88b8a30e2f9953153e9db943 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:11:14,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:11:14,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:11:15,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:11:15,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:11:15,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:11:15,045 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:11:15,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:11:15,053 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:11:15,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:11:15,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:11:15,058 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:11:15,059 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:11:15,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:11:15,063 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:11:15,065 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:11:15,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:11:15,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:11:15,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:11:15,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:11:15,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:11:15,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:11:15,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:11:15,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:11:15,092 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:11:15,096 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:11:15,097 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:11:15,098 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:11:15,100 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:11:15,102 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:11:15,103 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:11:15,105 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:11:15,107 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:11:15,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:11:15,111 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:11:15,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:11:15,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:11:15,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:11:15,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:11:15,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:11:15,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:11:15,116 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 03:11:15,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:11:15,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:11:15,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:11:15,170 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:11:15,170 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:11:15,170 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:11:15,171 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:11:15,171 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:11:15,171 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:11:15,172 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:11:15,172 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:11:15,172 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:11:15,172 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:11:15,173 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:11:15,173 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:11:15,174 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:11:15,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:11:15,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:11:15,175 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:11:15,175 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:11:15,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:11:15,176 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:11:15,176 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:11:15,176 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:11:15,176 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:11:15,177 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:11:15,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:11:15,177 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:11:15,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:11:15,178 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:11:15,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:11:15,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:11:15,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:15,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:11:15,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:11:15,182 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:11:15,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:11:15,182 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:11:15,182 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:11:15,183 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-16 03:11:15,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:11:15,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:11:15,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:11:15,587 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:11:15,588 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:11:15,590 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:11:15,684 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/7a9ddc5e0/c6b3c534c8154953b2aa745569b42ea9/FLAGd998df233 [2021-10-16 03:11:16,471 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:11:16,473 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:11:16,503 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/7a9ddc5e0/c6b3c534c8154953b2aa745569b42ea9/FLAGd998df233 [2021-10-16 03:11:16,686 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/7a9ddc5e0/c6b3c534c8154953b2aa745569b42ea9 [2021-10-16 03:11:16,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:11:16,693 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:11:16,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:16,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:11:16,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:11:16,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:16" (1/1) ... [2021-10-16 03:11:16,705 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5143d1a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:16, skipping insertion in model container [2021-10-16 03:11:16,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:16" (1/1) ... [2021-10-16 03:11:16,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:11:16,786 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:11:17,254 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:11:17,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:17,277 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:11:17,379 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:11:17,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:17,436 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:11:17,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17 WrapperNode [2021-10-16 03:11:17,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:17,438 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:17,438 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:11:17,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:11:17,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,492 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:17,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:11:17,541 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:11:17,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:11:17,551 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,592 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:11:17,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:11:17,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:11:17,600 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:11:17,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (1/1) ... [2021-10-16 03:11:17,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:17,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:17,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:11:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:11:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:11:17,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:11:17,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:11:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:11:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:11:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:11:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:11:17,710 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 03:11:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:11:17,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:11:17,711 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:11:18,696 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:11:18,696 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-16 03:11:18,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:18 BoogieIcfgContainer [2021-10-16 03:11:18,700 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:11:18,703 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:11:18,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:11:18,707 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:11:18,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:11:16" (1/3) ... [2021-10-16 03:11:18,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9b4688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:18, skipping insertion in model container [2021-10-16 03:11:18,709 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:17" (2/3) ... [2021-10-16 03:11:18,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d9b4688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:18, skipping insertion in model container [2021-10-16 03:11:18,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:18" (3/3) ... [2021-10-16 03:11:18,712 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-16 03:11:18,720 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:11:18,720 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-10-16 03:11:18,792 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:11:18,803 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 [2021-10-16 03:11:18,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-10-16 03:11:18,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 36 states have (on average 2.388888888888889) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:18,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:11:18,840 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:18,842 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:11:18,843 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 5879945, now seen corresponding path program 1 times [2021-10-16 03:11:18,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:18,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890447594] [2021-10-16 03:11:18,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:18,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:19,111 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:19,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890447594] [2021-10-16 03:11:19,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890447594] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:19,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:19,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:11:19,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248165029] [2021-10-16 03:11:19,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:19,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:19,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:19,154 INFO L87 Difference]: Start difference. First operand has 78 states, 36 states have (on average 2.388888888888889) internal successors, (86), 77 states have internal predecessors, (86), 0 states have call successors, (0), 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 2.0) 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) [2021-10-16 03:11:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:19,443 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2021-10-16 03:11:19,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:19,445 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 [2021-10-16 03:11:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:19,462 INFO L225 Difference]: With dead ends: 133 [2021-10-16 03:11:19,463 INFO L226 Difference]: Without dead ends: 129 [2021-10-16 03:11:19,466 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:19,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-10-16 03:11:19,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2021-10-16 03:11:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 2.264705882352941) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:19,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-10-16 03:11:19,529 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 4 [2021-10-16 03:11:19,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:19,530 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-10-16 03:11:19,530 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) [2021-10-16 03:11:19,531 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-10-16 03:11:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:11:19,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:19,531 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:11:19,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:11:19,532 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:19,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:19,538 INFO L82 PathProgramCache]: Analyzing trace with hash 5879946, now seen corresponding path program 1 times [2021-10-16 03:11:19,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:19,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931934322] [2021-10-16 03:11:19,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:19,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:19,672 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:19,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931934322] [2021-10-16 03:11:19,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931934322] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:19,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:19,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:11:19,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124574824] [2021-10-16 03:11:19,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:19,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:19,679 INFO L87 Difference]: Start difference. First operand 72 states and 77 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) [2021-10-16 03:11:19,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:19,854 INFO L93 Difference]: Finished difference Result 128 states and 137 transitions. [2021-10-16 03:11:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:19,856 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 [2021-10-16 03:11:19,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:19,857 INFO L225 Difference]: With dead ends: 128 [2021-10-16 03:11:19,857 INFO L226 Difference]: Without dead ends: 128 [2021-10-16 03:11:19,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-16 03:11:19,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 69. [2021-10-16 03:11:19,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 34 states have (on average 2.176470588235294) internal successors, (74), 68 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) [2021-10-16 03:11:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 74 transitions. [2021-10-16 03:11:19,866 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 74 transitions. Word has length 4 [2021-10-16 03:11:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:19,867 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 74 transitions. [2021-10-16 03:11:19,867 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) [2021-10-16 03:11:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 74 transitions. [2021-10-16 03:11:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:11:19,868 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:19,868 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:11:19,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:11:19,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash 6034729, now seen corresponding path program 1 times [2021-10-16 03:11:19,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:19,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629286202] [2021-10-16 03:11:19,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:19,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:19,947 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:19,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629286202] [2021-10-16 03:11:19,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629286202] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:19,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:19,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:11:19,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203223647] [2021-10-16 03:11:19,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:19,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:19,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:19,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:19,954 INFO L87 Difference]: Start difference. First operand 69 states and 74 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:19,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:19,969 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2021-10-16 03:11:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:19,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 03:11:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:19,971 INFO L225 Difference]: With dead ends: 79 [2021-10-16 03:11:19,971 INFO L226 Difference]: Without dead ends: 79 [2021-10-16 03:11:19,972 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 [2021-10-16 03:11:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-16 03:11:19,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 70. [2021-10-16 03:11:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 35 states have (on average 2.142857142857143) internal successors, (75), 69 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) [2021-10-16 03:11:19,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-10-16 03:11:19,986 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 4 [2021-10-16 03:11:19,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:19,987 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-10-16 03:11:19,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:19,988 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-10-16 03:11:19,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:11:19,988 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:19,989 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:19,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-16 03:11:19,989 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:19,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:19,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1413781069, now seen corresponding path program 1 times [2021-10-16 03:11:19,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:19,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130009259] [2021-10-16 03:11:19,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:19,992 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:20,103 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:20,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130009259] [2021-10-16 03:11:20,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130009259] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:20,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:20,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:11:20,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662731168] [2021-10-16 03:11:20,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:20,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:20,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:20,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:20,113 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-10-16 03:11:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:20,143 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2021-10-16 03:11:20,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:20,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 03:11:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:20,150 INFO L225 Difference]: With dead ends: 76 [2021-10-16 03:11:20,150 INFO L226 Difference]: Without dead ends: 76 [2021-10-16 03:11:20,152 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-16 03:11:20,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-10-16 03:11:20,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 40 states have (on average 2.0) internal successors, (80), 74 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) [2021-10-16 03:11:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2021-10-16 03:11:20,164 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 8 [2021-10-16 03:11:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:20,164 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2021-10-16 03:11:20,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 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) [2021-10-16 03:11:20,165 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2021-10-16 03:11:20,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:11:20,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:20,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:20,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-16 03:11:20,171 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:20,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:20,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1507454465, now seen corresponding path program 1 times [2021-10-16 03:11:20,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:20,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727165744] [2021-10-16 03:11:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:20,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:20,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:20,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727165744] [2021-10-16 03:11:20,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727165744] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:11:20,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110575801] [2021-10-16 03:11:20,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:20,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:20,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:20,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:20,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:11:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:20,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:11:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:20,472 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 [2021-10-16 03:11:20,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:11:20,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:11:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110575801] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:20,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:11:20,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [3] total 5 [2021-10-16 03:11:20,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958860081] [2021-10-16 03:11:20,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:20,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:11:20,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:20,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:11:20,545 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:20,647 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2021-10-16 03:11:20,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:20,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 03:11:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:20,649 INFO L225 Difference]: With dead ends: 82 [2021-10-16 03:11:20,649 INFO L226 Difference]: Without dead ends: 82 [2021-10-16 03:11:20,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:11:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-16 03:11:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-10-16 03:11:20,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.925) internal successors, (77), 71 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-10-16 03:11:20,656 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 11 [2021-10-16 03:11:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:20,657 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-10-16 03:11:20,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-10-16 03:11:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 03:11:20,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:20,658 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:20,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:20,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:20,883 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:20,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:20,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1507454466, now seen corresponding path program 1 times [2021-10-16 03:11:20,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:11:20,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484162818] [2021-10-16 03:11:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:20,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:11:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:20,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:11:20,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484162818] [2021-10-16 03:11:20,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484162818] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:11:20,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378238834] [2021-10-16 03:11:20,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:20,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:20,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:20,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:20,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 03:11:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:21,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:11:21,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:21,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:21,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378238834] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:21,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1291427114] [2021-10-16 03:11:21,275 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-16 03:11:21,276 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:11:21,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:11:21,291 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:11:21,292 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:11:21,336 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,340 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:11:21,341 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,341 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:11:21,346 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:11:21,347 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 03:11:21,356 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-10-16 03:11:21,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:21,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:11:21,437 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 03:11:21,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 03:11:21,443 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:11:21,451 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,453 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 03:11:21,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:11:21,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:11:21,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,505 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:11:21,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 122 [2021-10-16 03:11:21,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:11:21,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:134, output treesize:122 [2021-10-16 03:11:21,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:21,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:21,727 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_79| 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) [2021-10-16 03:11:21,732 INFO L168 Benchmark]: Toolchain (without parser) took 5038.04 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 89.2 MB in the beginning and 124.5 MB in the end (delta: -35.3 MB). Peak memory consumption was 7.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:21,732 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 130.0 MB. Free memory was 107.9 MB in the beginning and 107.8 MB in the end (delta: 141.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:21,733 INFO L168 Benchmark]: CACSL2BoogieTranslator took 739.29 ms. Allocated memory is still 130.0 MB. Free memory was 89.0 MB in the beginning and 96.7 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:21,734 INFO L168 Benchmark]: Boogie Procedure Inliner took 101.89 ms. Allocated memory is still 130.0 MB. Free memory was 96.7 MB in the beginning and 94.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:21,734 INFO L168 Benchmark]: Boogie Preprocessor took 58.29 ms. Allocated memory is still 130.0 MB. Free memory was 94.6 MB in the beginning and 93.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:21,735 INFO L168 Benchmark]: RCFGBuilder took 1100.07 ms. Allocated memory is still 130.0 MB. Free memory was 93.1 MB in the beginning and 70.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:11:21,736 INFO L168 Benchmark]: TraceAbstraction took 3027.74 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 69.5 MB in the beginning and 124.5 MB in the end (delta: -55.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:11:21,739 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 130.0 MB. Free memory was 107.9 MB in the beginning and 107.8 MB in the end (delta: 141.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 739.29 ms. Allocated memory is still 130.0 MB. Free memory was 89.0 MB in the beginning and 96.7 MB in the end (delta: -7.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 101.89 ms. Allocated memory is still 130.0 MB. Free memory was 96.7 MB in the beginning and 94.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.29 ms. Allocated memory is still 130.0 MB. Free memory was 94.6 MB in the beginning and 93.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1100.07 ms. Allocated memory is still 130.0 MB. Free memory was 93.1 MB in the beginning and 70.0 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3027.74 ms. Allocated memory was 130.0 MB in the beginning and 172.0 MB in the end (delta: 41.9 MB). Free memory was 69.5 MB in the beginning and 124.5 MB in the end (delta: -55.0 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_#length_79| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_79|: 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. [2021-10-16 03:11:21,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/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-5709675 [2021-10-16 03:11:24,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:11:24,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:11:24,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:11:24,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:11:24,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:11:24,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:11:24,874 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:11:24,877 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:11:24,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:11:24,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:11:24,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:11:24,883 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:11:24,885 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:11:24,887 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:11:24,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:11:24,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:11:24,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:11:24,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:11:24,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:11:24,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:11:24,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:11:24,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:11:24,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:11:24,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:11:24,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:11:24,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:11:24,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:11:24,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:11:24,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:11:24,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:11:24,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:11:24,923 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:11:24,924 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:11:24,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:11:24,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:11:24,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:11:24,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:11:24,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:11:24,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:11:24,931 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:11:24,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-16 03:11:24,985 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:11:24,986 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:11:24,991 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:11:24,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:11:24,993 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:11:24,993 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:11:24,993 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:11:24,994 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:11:24,994 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:11:24,995 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:11:24,996 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:11:24,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:11:24,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:11:24,997 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:11:24,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:11:24,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:11:24,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:11:24,998 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:11:24,998 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:11:24,999 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:11:24,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:11:24,999 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:11:24,999 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:11:25,000 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:11:25,000 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:11:25,000 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:11:25,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:11:25,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:11:25,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:11:25,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:25,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:11:25,004 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:11:25,004 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:11:25,005 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:11:25,005 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:11:25,005 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:11:25,006 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-16 03:11:25,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:11:25,549 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:11:25,553 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:11:25,554 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:11:25,555 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:11:25,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:11:25,649 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/8e5c080ff/ddcbfc49d0414693b4fdfb0a7f3cb500/FLAG4b7f41327 [2021-10-16 03:11:26,400 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:11:26,400 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:11:26,417 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/8e5c080ff/ddcbfc49d0414693b4fdfb0a7f3cb500/FLAG4b7f41327 [2021-10-16 03:11:26,619 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/data/8e5c080ff/ddcbfc49d0414693b4fdfb0a7f3cb500 [2021-10-16 03:11:26,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:11:26,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:11:26,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:26,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:11:26,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:11:26,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:26" (1/1) ... [2021-10-16 03:11:26,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@403817f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:26, skipping insertion in model container [2021-10-16 03:11:26,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:11:26" (1/1) ... [2021-10-16 03:11:26,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:11:26,722 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:11:27,219 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:11:27,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:27,256 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:11:27,349 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_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:11:27,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:11:27,395 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:11:27,395 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27 WrapperNode [2021-10-16 03:11:27,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:11:27,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:27,397 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:11:27,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:11:27,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:11:27,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:11:27,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:11:27,514 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:11:27,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,581 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:11:27,589 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:11:27,589 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:11:27,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:11:27,598 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (1/1) ... [2021-10-16 03:11:27,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:11:27,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:27,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:11:27,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:11:27,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:11:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:11:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:11:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:11:27,718 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:11:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:11:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:11:27,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 03:11:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:11:27,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:11:27,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:11:28,683 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:11:28,683 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-16 03:11:28,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:28 BoogieIcfgContainer [2021-10-16 03:11:28,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:11:28,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:11:28,689 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:11:28,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:11:28,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:11:26" (1/3) ... [2021-10-16 03:11:28,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a173e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:28, skipping insertion in model container [2021-10-16 03:11:28,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:11:27" (2/3) ... [2021-10-16 03:11:28,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42a173e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:11:28, skipping insertion in model container [2021-10-16 03:11:28,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:28" (3/3) ... [2021-10-16 03:11:28,697 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-16 03:11:28,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:11:28,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 41 error locations. [2021-10-16 03:11:28,779 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:11:28,787 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 [2021-10-16 03:11:28,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2021-10-16 03:11:28,808 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 90 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:11:28,816 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:28,816 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:11:28,817 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:28,824 INFO L82 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2021-10-16 03:11:28,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:28,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2108706494] [2021-10-16 03:11:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:28,841 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:28,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:28,845 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:28,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:11:29,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:29,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:11:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:29,134 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 [2021-10-16 03:11:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:29,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:29,208 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:29,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2108706494] [2021-10-16 03:11:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2108706494] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:29,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:29,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:11:29,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65894947] [2021-10-16 03:11:29,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:29,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:29,252 INFO L87 Difference]: Start difference. First operand has 91 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 90 states have internal predecessors, (102), 0 states have call successors, (0), 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) [2021-10-16 03:11:29,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:29,755 INFO L93 Difference]: Finished difference Result 157 states and 170 transitions. [2021-10-16 03:11:29,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:29,758 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 [2021-10-16 03:11:29,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:29,774 INFO L225 Difference]: With dead ends: 157 [2021-10-16 03:11:29,775 INFO L226 Difference]: Without dead ends: 152 [2021-10-16 03:11:29,777 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:29,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-10-16 03:11:29,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 84. [2021-10-16 03:11:29,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.934782608695652) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:29,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-10-16 03:11:29,848 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 5 [2021-10-16 03:11:29,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:29,849 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-10-16 03:11:29,849 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) [2021-10-16 03:11:29,850 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-10-16 03:11:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 03:11:29,851 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:29,851 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 03:11:29,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:30,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:30,066 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:30,067 INFO L82 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2021-10-16 03:11:30,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:30,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736939581] [2021-10-16 03:11:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:30,069 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:30,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:30,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:30,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:11:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:30,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:11:30,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:30,205 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 [2021-10-16 03:11:30,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:30,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:30,380 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:30,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736939581] [2021-10-16 03:11:30,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736939581] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:30,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:30,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 03:11:30,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079156807] [2021-10-16 03:11:30,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:11:30,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:30,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:11:30,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:11:30,386 INFO L87 Difference]: Start difference. First operand 84 states and 89 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) [2021-10-16 03:11:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:31,065 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2021-10-16 03:11:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:31,068 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 [2021-10-16 03:11:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:31,071 INFO L225 Difference]: With dead ends: 151 [2021-10-16 03:11:31,071 INFO L226 Difference]: Without dead ends: 151 [2021-10-16 03:11:31,072 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:11:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-10-16 03:11:31,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 81. [2021-10-16 03:11:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 46 states have (on average 1.8695652173913044) internal successors, (86), 80 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-10-16 03:11:31,088 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 5 [2021-10-16 03:11:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:31,095 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-10-16 03:11:31,095 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) [2021-10-16 03:11:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-10-16 03:11:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:11:31,096 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:31,097 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:31,119 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:31,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:31,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:31,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:31,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1809644651, now seen corresponding path program 1 times [2021-10-16 03:11:31,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:31,315 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541770794] [2021-10-16 03:11:31,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:31,316 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:31,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:31,317 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:31,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:11:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:31,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:11:31,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:31,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:31,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:31,493 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:31,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541770794] [2021-10-16 03:11:31,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541770794] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:31,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:31,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 03:11:31,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316193146] [2021-10-16 03:11:31,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:11:31,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:31,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:11:31,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:11:31,497 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:31,530 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2021-10-16 03:11:31,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:11:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 03:11:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:31,534 INFO L225 Difference]: With dead ends: 92 [2021-10-16 03:11:31,538 INFO L226 Difference]: Without dead ends: 92 [2021-10-16 03:11:31,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:11:31,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-16 03:11:31,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 90. [2021-10-16 03:11:31,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 89 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2021-10-16 03:11:31,553 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 7 [2021-10-16 03:11:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:31,553 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2021-10-16 03:11:31,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2021-10-16 03:11:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-16 03:11:31,555 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:31,555 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:31,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:31,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:31,776 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:31,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:31,777 INFO L82 PathProgramCache]: Analyzing trace with hash 671668623, now seen corresponding path program 1 times [2021-10-16 03:11:31,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:31,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [324938519] [2021-10-16 03:11:31,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:31,778 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:31,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:31,780 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:31,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:11:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:31,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:11:31,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:31,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:32,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:32,069 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:32,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [324938519] [2021-10-16 03:11:32,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [324938519] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:11:32,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:11:32,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:11:32,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437434084] [2021-10-16 03:11:32,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:11:32,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:32,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:11:32,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:32,073 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:32,122 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-10-16 03:11:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:11:32,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-16 03:11:32,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:32,125 INFO L225 Difference]: With dead ends: 90 [2021-10-16 03:11:32,125 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 03:11:32,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:11:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 03:11:32,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-10-16 03:11:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 88 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) [2021-10-16 03:11:32,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-10-16 03:11:32,139 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 9 [2021-10-16 03:11:32,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:32,140 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-10-16 03:11:32,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:32,141 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-10-16 03:11:32,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 03:11:32,142 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:32,143 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:32,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:32,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:32,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:32,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1971466659, now seen corresponding path program 1 times [2021-10-16 03:11:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:32,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1241487591] [2021-10-16 03:11:32,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:32,353 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:32,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:32,355 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:32,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 03:11:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:32,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:11:32,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:32,544 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 [2021-10-16 03:11:32,641 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:11:32,641 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 [2021-10-16 03:11:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:32,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:39,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:39,178 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:39,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1241487591] [2021-10-16 03:11:39,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1241487591] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:39,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [161065365] [2021-10-16 03:11:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:39,183 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:11:39,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:11:39,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:11:39,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 03:11:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:39,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:11:39,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:39,450 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 [2021-10-16 03:11:39,508 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:11:39,508 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 17 treesize of output 22 [2021-10-16 03:11:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:39,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:39,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [161065365] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:39,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383864937] [2021-10-16 03:11:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:39,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:39,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:39,646 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:39,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 03:11:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:39,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:11:39,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:39,828 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 [2021-10-16 03:11:39,919 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:11:39,919 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 [2021-10-16 03:11:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:40,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:46,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383864937] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:46,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:11:46,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3, 3, 4, 4] total 6 [2021-10-16 03:11:46,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109883134] [2021-10-16 03:11:46,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:11:46,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:11:46,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:11:46,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=24, Unknown=3, NotChecked=0, Total=42 [2021-10-16 03:11:46,385 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:11:48,927 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2021-10-16 03:11:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:11:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 03:11:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:11:48,929 INFO L225 Difference]: With dead ends: 100 [2021-10-16 03:11:48,930 INFO L226 Difference]: Without dead ends: 100 [2021-10-16 03:11:48,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 14234.4ms TimeCoverageRelationStatistics Valid=29, Invalid=39, Unknown=4, NotChecked=0, Total=72 [2021-10-16 03:11:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-16 03:11:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 88. [2021-10-16 03:11:48,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 87 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) [2021-10-16 03:11:48,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2021-10-16 03:11:48,938 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 16 [2021-10-16 03:11:48,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:11:48,938 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2021-10-16 03:11:48,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:11:48,938 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2021-10-16 03:11:48,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 03:11:48,939 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:11:48,939 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 03:11:48,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:49,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:49,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:11:49,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:11:49,567 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:11:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:11:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1971466660, now seen corresponding path program 1 times [2021-10-16 03:11:49,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:11:49,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [123248845] [2021-10-16 03:11:49,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:49,568 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:11:49,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:11:49,569 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:11:49,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 03:11:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:49,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:11:49,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:49,811 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 [2021-10-16 03:11:49,820 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 [2021-10-16 03:11:50,008 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:11:50,009 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 [2021-10-16 03:11:50,032 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:50,035 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 [2021-10-16 03:11:50,227 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:50,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:55,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:11:55,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [123248845] [2021-10-16 03:11:55,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [123248845] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:55,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1220123465] [2021-10-16 03:11:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:55,206 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:11:55,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:11:55,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:11:55,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 03:11:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:55,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:11:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:55,607 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 [2021-10-16 03:11:55,620 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 [2021-10-16 03:11:55,775 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:11:55,776 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 28 treesize of output 30 [2021-10-16 03:11:55,793 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:55,794 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 27 treesize of output 27 [2021-10-16 03:11:55,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:55,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:11:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:58,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1220123465] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:11:58,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736938197] [2021-10-16 03:11:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:11:58,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:11:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:11:58,775 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:11:58,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 03:11:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:11:58,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 03:11:58,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:11:59,001 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 [2021-10-16 03:11:59,009 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 [2021-10-16 03:11:59,164 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:11:59,165 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 30 treesize of output 32 [2021-10-16 03:11:59,182 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:11:59,182 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 29 treesize of output 29 [2021-10-16 03:11:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:11:59,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:02,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:02,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736938197] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:12:02,047 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:12:02,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-16 03:12:02,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809053710] [2021-10-16 03:12:02,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:12:02,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:12:02,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=36, Unknown=2, NotChecked=0, Total=56 [2021-10-16 03:12:02,049 INFO L87 Difference]: Start difference. First operand 88 states and 93 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:05,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:05,818 INFO L93 Difference]: Finished difference Result 113 states and 119 transitions. [2021-10-16 03:12:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:12:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 03:12:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:05,820 INFO L225 Difference]: With dead ends: 113 [2021-10-16 03:12:05,820 INFO L226 Difference]: Without dead ends: 113 [2021-10-16 03:12:05,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 8926.3ms TimeCoverageRelationStatistics Valid=41, Invalid=67, Unknown=2, NotChecked=0, Total=110 [2021-10-16 03:12:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-10-16 03:12:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 87. [2021-10-16 03:12:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.7037037037037037) internal successors, (92), 86 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 92 transitions. [2021-10-16 03:12:05,828 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 92 transitions. Word has length 16 [2021-10-16 03:12:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:05,828 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 92 transitions. [2021-10-16 03:12:05,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:05,829 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 92 transitions. [2021-10-16 03:12:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-16 03:12:05,830 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:05,830 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:05,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:06,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:06,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:06,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:12:06,446 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:06,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1895030251, now seen corresponding path program 1 times [2021-10-16 03:12:06,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:06,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577115496] [2021-10-16 03:12:06,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:06,447 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:06,448 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:06,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 03:12:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:06,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:12:06,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:06,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:06,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:06,854 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:06,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577115496] [2021-10-16 03:12:06,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577115496] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:12:06,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [537525652] [2021-10-16 03:12:06,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:06,855 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:12:06,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:12:06,863 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:12:06,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 03:12:07,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:07,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:12:07,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:07,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:07,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:07,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [537525652] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:12:07,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721785293] [2021-10-16 03:12:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:07,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:12:07,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:12:07,414 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:12:07,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 03:12:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:07,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:12:07,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:07,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:07,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:07,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721785293] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:12:07,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:12:07,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-16 03:12:07,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136168202] [2021-10-16 03:12:07,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:12:07,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:12:07,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:12:07,864 INFO L87 Difference]: Start difference. First operand 87 states and 92 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:07,979 INFO L93 Difference]: Finished difference Result 87 states and 91 transitions. [2021-10-16 03:12:07,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:12:07,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2021-10-16 03:12:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:07,981 INFO L225 Difference]: With dead ends: 87 [2021-10-16 03:12:07,981 INFO L226 Difference]: Without dead ends: 87 [2021-10-16 03:12:07,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:12:07,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-16 03:12:07,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-16 03:12:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 86 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) [2021-10-16 03:12:07,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-10-16 03:12:07,987 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 21 [2021-10-16 03:12:07,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:07,987 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-10-16 03:12:07,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:07,988 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-10-16 03:12:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:12:07,989 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:07,989 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:08,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:08,226 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:08,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:08,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:12:08,603 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:08,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:08,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1765778069, now seen corresponding path program 1 times [2021-10-16 03:12:08,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:08,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26157190] [2021-10-16 03:12:08,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:08,605 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:08,605 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:08,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 03:12:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:08,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 03:12:08,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:08,926 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 [2021-10-16 03:12:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:08,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:08,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:08,999 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:08,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26157190] [2021-10-16 03:12:08,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26157190] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:08,999 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:09,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:12:09,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997727089] [2021-10-16 03:12:09,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:12:09,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:09,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:12:09,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:12:09,002 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:09,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:09,193 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-10-16 03:12:09,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:12:09,193 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 22 [2021-10-16 03:12:09,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:09,194 INFO L225 Difference]: With dead ends: 96 [2021-10-16 03:12:09,194 INFO L226 Difference]: Without dead ends: 96 [2021-10-16 03:12:09,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:12:09,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-16 03:12:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 84. [2021-10-16 03:12:09,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 83 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) [2021-10-16 03:12:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-10-16 03:12:09,200 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 22 [2021-10-16 03:12:09,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:09,200 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-10-16 03:12:09,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-10-16 03:12:09,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 03:12:09,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:09,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:09,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 03:12:09,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:09,416 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:09,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:09,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1765778068, now seen corresponding path program 1 times [2021-10-16 03:12:09,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:09,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1161899266] [2021-10-16 03:12:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:09,417 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:09,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:09,418 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-16 03:12:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:09,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:12:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:09,737 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 [2021-10-16 03:12:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:09,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:09,903 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:09,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1161899266] [2021-10-16 03:12:09,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1161899266] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:09,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:09,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 03:12:09,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209563209] [2021-10-16 03:12:09,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:12:09,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:09,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:12:09,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:12:09,905 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:10,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:10,195 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-10-16 03:12:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:12:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 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 22 [2021-10-16 03:12:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:10,197 INFO L225 Difference]: With dead ends: 81 [2021-10-16 03:12:10,197 INFO L226 Difference]: Without dead ends: 81 [2021-10-16 03:12:10,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:12:10,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-16 03:12:10,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-16 03:12:10,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 54 states have (on average 1.5740740740740742) internal successors, (85), 80 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:10,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2021-10-16 03:12:10,202 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 22 [2021-10-16 03:12:10,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:10,202 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2021-10-16 03:12:10,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.333333333333333) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2021-10-16 03:12:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 03:12:10,204 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:10,204 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:10,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-16 03:12:10,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:10,419 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:10,420 INFO L82 PathProgramCache]: Analyzing trace with hash 199703601, now seen corresponding path program 1 times [2021-10-16 03:12:10,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:10,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1577256802] [2021-10-16 03:12:10,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:10,421 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:10,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:10,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:10,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 03:12:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:10,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:12:10,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:10,830 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 [2021-10-16 03:12:10,903 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-10-16 03:12:10,904 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 [2021-10-16 03:12:11,297 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 03:12:11,297 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 3 case distinctions, treesize of input 41 treesize of output 52 [2021-10-16 03:12:12,071 INFO L354 Elim1Store]: treesize reduction 30, result has 36.2 percent of original size [2021-10-16 03:12:12,071 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 3 case distinctions, treesize of input 42 treesize of output 53 [2021-10-16 03:12:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:12,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:15,282 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:15,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1577256802] [2021-10-16 03:12:15,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1577256802] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 03:12:15,283 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:12:15,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-16 03:12:15,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475966290] [2021-10-16 03:12:15,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:12:15,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:15,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:12:15,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=58, Unknown=1, NotChecked=0, Total=90 [2021-10-16 03:12:15,285 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:15,783 INFO L93 Difference]: Finished difference Result 87 states and 92 transitions. [2021-10-16 03:12:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:12:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-10-16 03:12:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:15,785 INFO L225 Difference]: With dead ends: 87 [2021-10-16 03:12:15,785 INFO L226 Difference]: Without dead ends: 87 [2021-10-16 03:12:15,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2388.6ms TimeCoverageRelationStatistics Valid=37, Invalid=72, Unknown=1, NotChecked=0, Total=110 [2021-10-16 03:12:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-16 03:12:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-10-16 03:12:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.462962962962963) internal successors, (79), 74 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) [2021-10-16 03:12:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-10-16 03:12:15,790 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 27 [2021-10-16 03:12:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:15,790 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-10-16 03:12:15,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:15,791 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-10-16 03:12:15,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-16 03:12:15,792 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:15,792 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:15,804 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-16 03:12:15,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:15,999 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:15,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:15,999 INFO L82 PathProgramCache]: Analyzing trace with hash 199703602, now seen corresponding path program 1 times [2021-10-16 03:12:16,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:16,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [586276518] [2021-10-16 03:12:16,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:16,000 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:16,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:16,005 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:16,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-16 03:12:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:16,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 03:12:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:16,427 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 [2021-10-16 03:12:16,446 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 [2021-10-16 03:12:16,531 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:12:16,531 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 28 treesize of output 30 [2021-10-16 03:12:16,539 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 03:12:16,540 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 27 treesize of output 23 [2021-10-16 03:12:16,850 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-10-16 03:12:16,851 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 3 case distinctions, treesize of input 23 treesize of output 28 [2021-10-16 03:12:17,603 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-10-16 03:12:17,603 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 3 case distinctions, treesize of input 23 treesize of output 32 [2021-10-16 03:12:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:18,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:12:21,877 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:21,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [586276518] [2021-10-16 03:12:21,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [586276518] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 03:12:21,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:12:21,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2021-10-16 03:12:21,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764831875] [2021-10-16 03:12:21,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 03:12:21,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:21,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 03:12:21,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=59, Unknown=1, NotChecked=0, Total=90 [2021-10-16 03:12:21,880 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:23,141 INFO L93 Difference]: Finished difference Result 69 states and 73 transitions. [2021-10-16 03:12:23,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:12:23,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 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 27 [2021-10-16 03:12:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:23,144 INFO L225 Difference]: With dead ends: 69 [2021-10-16 03:12:23,144 INFO L226 Difference]: Without dead ends: 69 [2021-10-16 03:12:23,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 2755.6ms TimeCoverageRelationStatistics Valid=36, Invalid=73, Unknown=1, NotChecked=0, Total=110 [2021-10-16 03:12:23,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-16 03:12:23,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-16 03:12:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 68 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2021-10-16 03:12:23,148 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 27 [2021-10-16 03:12:23,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:23,148 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2021-10-16 03:12:23,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:23,149 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2021-10-16 03:12:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 03:12:23,150 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:23,150 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:23,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:23,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:23,355 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:23,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1895844371, now seen corresponding path program 1 times [2021-10-16 03:12:23,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:23,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1051916553] [2021-10-16 03:12:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:23,356 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:23,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:23,357 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:23,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-16 03:12:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:23,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:12:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:23,782 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 [2021-10-16 03:12:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:23,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:23,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:23,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1051916553] [2021-10-16 03:12:23,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1051916553] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:23,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:23,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-16 03:12:23,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363642568] [2021-10-16 03:12:23,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:12:23,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:23,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:12:23,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:12:23,943 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:24,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:24,373 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2021-10-16 03:12:24,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:12:24,374 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2021-10-16 03:12:24,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:24,375 INFO L225 Difference]: With dead ends: 80 [2021-10-16 03:12:24,375 INFO L226 Difference]: Without dead ends: 80 [2021-10-16 03:12:24,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:12:24,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-16 03:12:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2021-10-16 03:12:24,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:24,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-10-16 03:12:24,377 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 28 [2021-10-16 03:12:24,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:24,378 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-10-16 03:12:24,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:24,378 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-10-16 03:12:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 03:12:24,379 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:24,379 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:24,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:24,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:24,590 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:24,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:24,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1895844372, now seen corresponding path program 1 times [2021-10-16 03:12:24,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:24,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1339268057] [2021-10-16 03:12:24,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:24,591 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:24,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:24,593 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:24,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-16 03:12:25,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:25,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 03:12:25,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:25,195 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 [2021-10-16 03:12:25,341 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:25,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:12:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:12:25,691 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:12:25,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1339268057] [2021-10-16 03:12:25,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1339268057] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:12:25,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:12:25,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-10-16 03:12:25,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551027910] [2021-10-16 03:12:25,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:12:25,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:12:25,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:12:25,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:12:25,693 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:12:26,288 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2021-10-16 03:12:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:12:26,289 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-16 03:12:26,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:12:26,290 INFO L225 Difference]: With dead ends: 67 [2021-10-16 03:12:26,291 INFO L226 Difference]: Without dead ends: 67 [2021-10-16 03:12:26,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 252.0ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-10-16 03:12:26,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-16 03:12:26,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-16 03:12:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.3148148148148149) internal successors, (71), 66 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2021-10-16 03:12:26,294 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 28 [2021-10-16 03:12:26,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:12:26,295 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2021-10-16 03:12:26,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.428571428571429) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:12:26,295 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2021-10-16 03:12:26,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 03:12:26,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:12:26,297 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:12:26,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-16 03:12:26,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:12:26,511 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:12:26,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:12:26,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1740473348, now seen corresponding path program 1 times [2021-10-16 03:12:26,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:12:26,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [78718563] [2021-10-16 03:12:26,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:12:26,512 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:12:26,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:12:26,513 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:12:26,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-16 03:12:27,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:12:27,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-16 03:12:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:12:27,101 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 [2021-10-16 03:12:27,358 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-10-16 03:12:27,359 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 25 treesize of output 36 [2021-10-16 03:12:27,557 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-16 03:12:27,557 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 42 treesize of output 47 [2021-10-16 03:12:27,978 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-16 03:12:27,979 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 60 treesize of output 72 [2021-10-16 03:12:28,716 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-16 03:12:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 82 [2021-10-16 03:12:35,390 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-16 03:12:35,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 115 [2021-10-16 03:12:37,330 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-16 03:12:37,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 56 [2021-10-16 03:12:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:12:37,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:13:00,627 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:00,629 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-10-16 03:13:29,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (v_DerPreprocessor_1 (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (ULTIMATE.start_node_create_~temp~0.offset (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) (bvadd (_ bv4 32) ULTIMATE.start_node_create_~temp~0.offset) (_ bv0 32)) (bvadd (_ bv8 32) ULTIMATE.start_node_create_~temp~0.offset) (_ bv0 32)) ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_1) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))))))))))))) (_ bv1 1)))) is different from false [2021-10-16 03:13:29,788 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 1452 treesize of output 1440 [2021-10-16 03:13:48,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:13:48,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 272 [2021-10-16 03:13:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:13:52,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:13:52,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [78718563] [2021-10-16 03:13:52,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [78718563] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 03:13:52,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:13:52,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 25 [2021-10-16 03:13:52,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096766586] [2021-10-16 03:13:52,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:13:52,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:13:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:13:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=493, Unknown=17, NotChecked=46, Total=650 [2021-10-16 03:13:52,414 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 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) [2021-10-16 03:14:07,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:14:07,914 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-10-16 03:14:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:14:07,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 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 [2021-10-16 03:14:07,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:14:07,916 INFO L225 Difference]: With dead ends: 79 [2021-10-16 03:14:07,916 INFO L226 Difference]: Without dead ends: 79 [2021-10-16 03:14:07,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 56141.8ms TimeCoverageRelationStatistics Valid=288, Invalid=889, Unknown=17, NotChecked=66, Total=1260 [2021-10-16 03:14:07,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-16 03:14:07,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2021-10-16 03:14:07,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:14:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-10-16 03:14:07,920 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 33 [2021-10-16 03:14:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:14:07,921 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-10-16 03:14:07,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 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) [2021-10-16 03:14:07,921 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-10-16 03:14:07,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-16 03:14:07,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:14:07,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:14:07,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-16 03:14:08,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:14:08,131 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:14:08,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:14:08,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1740473347, now seen corresponding path program 1 times [2021-10-16 03:14:08,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:14:08,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020433909] [2021-10-16 03:14:08,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:14:08,132 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:14:08,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:14:08,133 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:14:08,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-10-16 03:14:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:14:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-16 03:14:08,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:14:08,898 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 [2021-10-16 03:14:08,912 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 [2021-10-16 03:14:09,257 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:14:09,258 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 19 treesize of output 19 [2021-10-16 03:14:09,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-16 03:14:09,434 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:14:09,435 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 21 treesize of output 20 [2021-10-16 03:14:09,530 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-16 03:14:09,530 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 31 treesize of output 36 [2021-10-16 03:14:09,801 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-16 03:14:09,801 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 49 treesize of output 61 [2021-10-16 03:14:09,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:14:09,991 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-10-16 03:14:09,991 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 2 case distinctions, treesize of input 30 treesize of output 32 [2021-10-16 03:14:10,310 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-16 03:14:10,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 111 [2021-10-16 03:14:10,410 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-16 03:14:10,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 107 [2021-10-16 03:14:22,315 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-16 03:14:22,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 146 [2021-10-16 03:14:29,894 WARN L207 SmtUtils]: Spent 7.57 s on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2021-10-16 03:14:29,895 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-16 03:14:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 143 [2021-10-16 03:14:32,640 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-16 03:14:32,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 79 [2021-10-16 03:14:32,702 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-16 03:14:32,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 65 [2021-10-16 03:14:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:14:32,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:14:47,960 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd (_ bv12 32) .cse0)))) (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset))) (bvule (bvadd (_ bv12 32) (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_node_create_#res.base|) .cse1 |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse1 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) is different from false [2021-10-16 03:14:50,008 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse0 |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse0 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (forall ((ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse1) (bvadd .cse1 (_ bv12 32)))))) is different from false [2021-10-16 03:14:50,032 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:14:50,034 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-16 03:14:50,037 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:14:50,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-16 03:14:52,083 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (v_DerPreprocessor_3 (_ BitVec 32)) (v_DerPreprocessor_2 (_ BitVec 32)) (v_prenex_4 (_ BitVec 32)) (v_prenex_5 (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) v_prenex_4))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_3) .cse0 v_prenex_5)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_2) .cse0 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (forall ((v_DerPreprocessor_3 (_ BitVec 32))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_3) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) |c_ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse1) (bvadd .cse1 (_ bv12 32)))))) is different from false [2021-10-16 03:15:27,241 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 3821 treesize of output 3801 [2021-10-16 03:15:27,277 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 523330 treesize of output 519166 [2021-10-16 03:15:32,998 WARN L207 SmtUtils]: Spent 5.72 s on a formula simplification. DAG size of input: 710 DAG size of output: 710 [2021-10-16 03:15:34,901 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:15:34,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020433909] [2021-10-16 03:15:34,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:15:34,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [878763728] [2021-10-16 03:15:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:15:34,903 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:15:34,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:15:34,909 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:15:34,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-10-16 03:15:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:15:35,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-16 03:15:35,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:15:35,999 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 [2021-10-16 03:15:36,009 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 [2021-10-16 03:15:36,738 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:15:36,739 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 [2021-10-16 03:15:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-10-16 03:15:37,036 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-16 03:15:37,036 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 31 treesize of output 36 [2021-10-16 03:15:37,123 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-10-16 03:15:37,123 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 21 treesize of output 20 [2021-10-16 03:15:37,469 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-16 03:15:37,469 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 30 treesize of output 32 [2021-10-16 03:15:37,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:15:37,559 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-10-16 03:15:37,560 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 2 case distinctions, treesize of input 49 treesize of output 61 [2021-10-16 03:15:38,141 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-16 03:15:38,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 111 [2021-10-16 03:15:38,239 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-16 03:15:38,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 107 [2021-10-16 03:15:46,846 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-16 03:15:46,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 131 treesize of output 146 [2021-10-16 03:15:48,764 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-16 03:15:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 128 treesize of output 143 [2021-10-16 03:15:52,189 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-16 03:15:52,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 75 [2021-10-16 03:15:52,244 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-16 03:15:52,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 65 [2021-10-16 03:15:52,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:15:52,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:15:52,575 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:52,576 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 91 [2021-10-16 03:15:52,578 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:15:52,579 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 83 [2021-10-16 03:16:22,847 WARN L207 SmtUtils]: Spent 6.19 s on a formula simplification that was a NOOP. DAG size: 44 [2021-10-16 03:16:24,897 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) (bvadd (_ bv8 32) c_ULTIMATE.start_node_create_~temp~0.offset) (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd (_ bv8 32) .cse0) (bvadd .cse0 (_ bv12 32))))) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (v_prenex_10 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_prenex_9 (_ BitVec 32))) (let ((.cse1 (bvadd (_ bv8 32) c_ULTIMATE.start_node_create_~temp~0.offset)) (.cse2 (bvadd (_ bv4 32) v_prenex_9))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5) .cse2 v_prenex_10)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse1 (_ bv0 32)) c_ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_4) .cse2 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset)))))) is different from false [2021-10-16 03:16:26,974 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (v_prenex_10 (_ BitVec 32)) (v_DerPreprocessor_4 (_ BitVec 32)) (v_prenex_9 (_ BitVec 32)) (ULTIMATE.start_node_create_~temp~0.offset (_ BitVec 32))) (let ((.cse0 (bvadd (_ bv4 32) ULTIMATE.start_node_create_~temp~0.offset)) (.cse1 (bvadd (_ bv8 32) ULTIMATE.start_node_create_~temp~0.offset)) (.cse2 (bvadd (_ bv4 32) v_prenex_9))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) .cse0 (_ bv0 32)) .cse1 (_ bv0 32)) ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5) .cse2 v_prenex_10)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv12 32)) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse0 (_ bv0 32)) .cse1 (_ bv0 32)) ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_4) .cse2 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (forall ((v_DerPreprocessor_5 (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.offset| (_ BitVec 32)) (ULTIMATE.start_node_create_~temp~0.offset (_ BitVec 32))) (let ((.cse3 (select (select (store |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base (store (store (store (store (select |c_#memory_$Pointer$.offset| c_ULTIMATE.start_node_create_~temp~0.base) (bvadd (_ bv4 32) ULTIMATE.start_node_create_~temp~0.offset) (_ bv0 32)) (bvadd (_ bv8 32) ULTIMATE.start_node_create_~temp~0.offset) (_ bv0 32)) ULTIMATE.start_node_create_~temp~0.offset v_DerPreprocessor_5) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.offset|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (bvule (bvadd .cse3 (_ bv8 32)) (bvadd .cse3 (_ bv12 32)))))) is different from false [2021-10-16 03:16:27,135 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 3839 treesize of output 3819 [2021-10-16 03:16:27,165 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 65298 treesize of output 64766 [2021-10-16 03:16:49,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-10-16 03:16:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:16:49,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [878763728] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 03:16:49,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:16:49,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 25 [2021-10-16 03:16:49,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721426180] [2021-10-16 03:16:49,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:16:49,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:16:49,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:16:49,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1000, Unknown=26, NotChecked=350, Total=1560 [2021-10-16 03:16:49,333 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 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) [2021-10-16 03:17:06,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:06,618 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2021-10-16 03:17:06,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-16 03:17:06,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 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 [2021-10-16 03:17:06,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:06,620 INFO L225 Difference]: With dead ends: 78 [2021-10-16 03:17:06,620 INFO L226 Difference]: Without dead ends: 78 [2021-10-16 03:17:06,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 98602.5ms TimeCoverageRelationStatistics Valid=448, Invalid=1526, Unknown=26, NotChecked=450, Total=2450 [2021-10-16 03:17:06,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-16 03:17:06,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2021-10-16 03:17:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 64 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) [2021-10-16 03:17:06,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2021-10-16 03:17:06,625 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 33 [2021-10-16 03:17:06,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:06,625 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2021-10-16 03:17:06,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 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) [2021-10-16 03:17:06,625 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2021-10-16 03:17:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-16 03:17:06,626 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:06,627 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:06,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (23)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:06,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:07,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:07,031 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:17:07,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:07,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1329024838, now seen corresponding path program 1 times [2021-10-16 03:17:07,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:07,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1314018943] [2021-10-16 03:17:07,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:07,033 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:07,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:07,035 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:07,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-16 03:17:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:07,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 03:17:07,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:07,856 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 [2021-10-16 03:17:08,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 17 [2021-10-16 03:17:08,207 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 21 treesize of output 13 [2021-10-16 03:17:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:17:08,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:08,318 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 44 treesize of output 40 [2021-10-16 03:17:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:17:08,813 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:08,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1314018943] [2021-10-16 03:17:08,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1314018943] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:08,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:08,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 10 [2021-10-16 03:17:08,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333843970] [2021-10-16 03:17:08,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-16 03:17:08,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:08,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-16 03:17:08,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:17:08,814 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:09,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:09,817 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2021-10-16 03:17:09,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:17:09,817 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-10-16 03:17:09,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:09,818 INFO L225 Difference]: With dead ends: 96 [2021-10-16 03:17:09,818 INFO L226 Difference]: Without dead ends: 96 [2021-10-16 03:17:09,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-10-16 03:17:09,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-16 03:17:09,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-10-16 03:17:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 65 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:09,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-10-16 03:17:09,822 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 36 [2021-10-16 03:17:09,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:09,822 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-10-16 03:17:09,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 11 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:09,823 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-10-16 03:17:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-16 03:17:09,823 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:09,823 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:09,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:10,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:10,035 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:17:10,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:10,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1329024837, now seen corresponding path program 1 times [2021-10-16 03:17:10,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:10,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035033982] [2021-10-16 03:17:10,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:10,036 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:10,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:10,037 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:10,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-10-16 03:17:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:10,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 03:17:10,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:11,017 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 [2021-10-16 03:17:11,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-16 03:17:11,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 17 treesize of output 13 [2021-10-16 03:17:11,451 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 31 treesize of output 23 [2021-10-16 03:17:11,462 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 20 treesize of output 12 [2021-10-16 03:17:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:17:11,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:11,852 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 40 treesize of output 32 [2021-10-16 03:17:11,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:11,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:11,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:17:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:17:12,649 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:12,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035033982] [2021-10-16 03:17:12,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035033982] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:12,649 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:12,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2021-10-16 03:17:12,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483344656] [2021-10-16 03:17:12,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:17:12,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:12,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:17:12,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-10-16 03:17:12,650 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:14,376 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2021-10-16 03:17:14,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 03:17:14,378 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 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 36 [2021-10-16 03:17:14,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:14,379 INFO L225 Difference]: With dead ends: 90 [2021-10-16 03:17:14,379 INFO L226 Difference]: Without dead ends: 90 [2021-10-16 03:17:14,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1128.8ms TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-10-16 03:17:14,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-16 03:17:14,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 68. [2021-10-16 03:17:14,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 67 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2021-10-16 03:17:14,382 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 36 [2021-10-16 03:17:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:14,383 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2021-10-16 03:17:14,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:14,383 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2021-10-16 03:17:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 03:17:14,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:14,384 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:14,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:14,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:14,591 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:17:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1749901707, now seen corresponding path program 1 times [2021-10-16 03:17:14,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:14,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1768207664] [2021-10-16 03:17:14,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:14,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:14,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:14,592 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:14,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-10-16 03:17:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:15,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 03:17:15,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:15,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 12 [2021-10-16 03:17:15,589 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 16 treesize of output 8 [2021-10-16 03:17:15,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:17:15,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:15,661 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 30 treesize of output 26 [2021-10-16 03:17:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-16 03:17:15,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:15,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1768207664] [2021-10-16 03:17:15,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1768207664] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:15,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:15,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-10-16 03:17:15,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725641862] [2021-10-16 03:17:15,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 03:17:15,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:15,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 03:17:15,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-10-16 03:17:15,888 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:16,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:17:16,449 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-10-16 03:17:16,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 03:17:16,451 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-16 03:17:16,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:17:16,452 INFO L225 Difference]: With dead ends: 71 [2021-10-16 03:17:16,452 INFO L226 Difference]: Without dead ends: 71 [2021-10-16 03:17:16,453 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 258.5ms TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-10-16 03:17:16,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-16 03:17:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-10-16 03:17:16,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2413793103448276) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:16,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-10-16 03:17:16,455 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 37 [2021-10-16 03:17:16,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:17:16,455 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-10-16 03:17:16,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:17:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-10-16 03:17:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-16 03:17:16,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:17:16,457 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:17:16,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-10-16 03:17:16,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:17:16,657 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:17:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:17:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash -950961311, now seen corresponding path program 1 times [2021-10-16 03:17:16,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:17:16,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [430751586] [2021-10-16 03:17:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:17:16,659 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:17:16,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:17:16,659 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:17:16,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-16 03:17:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:17:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 03:17:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:17:17,881 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-16 03:17:17,882 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 22 treesize of output 31 [2021-10-16 03:17:18,091 INFO L354 Elim1Store]: treesize reduction 58, result has 31.8 percent of original size [2021-10-16 03:17:18,093 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 31 treesize of output 43 [2021-10-16 03:17:18,381 INFO L354 Elim1Store]: treesize reduction 112, result has 23.3 percent of original size [2021-10-16 03:17:18,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 44 [2021-10-16 03:17:22,184 INFO L354 Elim1Store]: treesize reduction 110, result has 24.7 percent of original size [2021-10-16 03:17:22,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 69 [2021-10-16 03:17:23,159 INFO L354 Elim1Store]: treesize reduction 31, result has 24.4 percent of original size [2021-10-16 03:17:23,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 31 [2021-10-16 03:17:23,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:17:23,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:17:29,919 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv0 32)))) is different from false [2021-10-16 03:17:31,932 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (ULTIMATE.start_dll_prepend_~new_head~1.offset (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) (bvadd (_ bv4 32) ULTIMATE.start_dll_prepend_~new_head~1.offset) |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset) (_ bv0 32)))) is different from false [2021-10-16 03:17:31,941 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:17:31,942 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 03:17:51,926 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 1569 treesize of output 1549 [2021-10-16 03:17:52,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:17:52,700 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:17:52,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [430751586] [2021-10-16 03:17:52,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [430751586] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:17:52,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:17:52,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14, 14] imperfect sequences [] total 25 [2021-10-16 03:17:52,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400378069] [2021-10-16 03:17:52,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-16 03:17:52,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:17:52,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-16 03:17:52,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=410, Unknown=9, NotChecked=86, Total=600 [2021-10-16 03:17:52,703 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 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) [2021-10-16 03:18:33,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:18:33,429 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-10-16 03:18:33,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:18:33,430 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-16 03:18:33,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:18:33,431 INFO L225 Difference]: With dead ends: 68 [2021-10-16 03:18:33,432 INFO L226 Difference]: Without dead ends: 68 [2021-10-16 03:18:33,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 50393.7ms TimeCoverageRelationStatistics Valid=319, Invalid=802, Unknown=9, NotChecked=130, Total=1260 [2021-10-16 03:18:33,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-16 03:18:33,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-16 03:18:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.2241379310344827) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:18:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2021-10-16 03:18:33,436 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 40 [2021-10-16 03:18:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:18:33,436 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2021-10-16 03:18:33,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 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) [2021-10-16 03:18:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2021-10-16 03:18:33,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-16 03:18:33,438 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:18:33,438 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:18:33,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-16 03:18:33,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:18:33,666 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 37 more)] === [2021-10-16 03:18:33,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:18:33,666 INFO L82 PathProgramCache]: Analyzing trace with hash 186410219, now seen corresponding path program 1 times [2021-10-16 03:18:33,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:18:33,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [32847074] [2021-10-16 03:18:33,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:18:33,667 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:18:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:18:33,668 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:18:33,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-10-16 03:18:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:18:34,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-16 03:18:34,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:18:34,935 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 [2021-10-16 03:18:35,234 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:18:35,234 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 20 treesize of output 20 [2021-10-16 03:18:35,557 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-10-16 03:18:35,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 31 [2021-10-16 03:18:35,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:35,873 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-10-16 03:18:35,873 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 2 case distinctions, treesize of input 31 treesize of output 43 [2021-10-16 03:18:36,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:36,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:36,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:36,189 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-10-16 03:18:36,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 44 [2021-10-16 03:18:36,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-16 03:18:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:37,010 INFO L354 Elim1Store]: treesize reduction 32, result has 50.0 percent of original size [2021-10-16 03:18:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 60 [2021-10-16 03:18:37,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:18:37,146 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 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:18:37,667 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 25 [2021-10-16 03:18:37,914 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-16 03:18:37,915 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 31 treesize of output 15 [2021-10-16 03:18:38,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-16 03:18:38,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 36 [2021-10-16 03:18:38,183 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-16 03:18:38,184 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 37 treesize of output 25 [2021-10-16 03:18:38,337 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 43 treesize of output 31 [2021-10-16 03:18:38,341 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 28 treesize of output 20 [2021-10-16 03:18:38,711 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 24 treesize of output 16 [2021-10-16 03:18:38,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:18:38,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:18:39,185 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 76 treesize of output 72 [2021-10-16 03:18:39,189 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 106 treesize of output 98 [2021-10-16 03:18:39,192 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:39,199 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-16 03:18:40,801 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:40,802 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-16 03:18:43,053 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse0 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base|) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0))) (and (= (select (select (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_prepend_#t~mem12.base|) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))) (store .cse3 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse3 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0) .cse1 .cse0)))) is different from false [2021-10-16 03:18:58,233 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:18:58,234 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-16 03:19:25,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse0 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse2 (let ((.cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base|) .cse5 v_DerPreprocessor_9))) (.cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse5 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse3 .cse4 (store (select .cse3 .cse4) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0))) (and .cse1 (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base|) .cse9 v_DerPreprocessor_9))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse9 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset|) c_ULTIMATE.start_main_~data~0) .cse0)))) is different from false [2021-10-16 03:19:27,669 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_9 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse5 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse4 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (= (select (select (let ((.cse0 (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse3 v_DerPreprocessor_9))) (.cse2 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse3 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse1 .cse2 (store (select .cse1 .cse2) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse0 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset) c_ULTIMATE.start_main_~data~0) .cse4 .cse5) (and (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse9 v_DerPreprocessor_9))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse9 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0)) (or (not .cse5) (not .cse4)))))) is different from false [2021-10-16 03:19:27,698 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:27,700 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-10-16 03:19:27,706 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 8394 treesize of output 8330 [2021-10-16 03:19:27,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:19:27,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [32847074] [2021-10-16 03:19:27,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:19:27,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [454598600] [2021-10-16 03:19:27,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:27,740 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:19:27,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:19:27,741 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:19:27,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-10-16 03:19:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:29,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-16 03:19:29,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:29,411 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 [2021-10-16 03:19:30,100 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:19:30,100 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 [2021-10-16 03:19:30,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:30,430 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 0 case distinctions, treesize of input 22 treesize of output 21 [2021-10-16 03:19:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:30,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:30,704 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:30,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-10-16 03:19:31,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:31,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:31,063 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-16 03:19:31,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 40 [2021-10-16 03:19:31,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-16 03:19:32,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:32,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:32,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:32,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:32,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 36 [2021-10-16 03:19:32,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:32,615 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 27 treesize of output 11 [2021-10-16 03:19:33,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:33,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:33,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:19:33,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 14 [2021-10-16 03:19:33,517 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-16 03:19:33,518 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 31 treesize of output 15 [2021-10-16 03:19:33,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-16 03:19:33,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 40 treesize of output 36 [2021-10-16 03:19:33,884 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-10-16 03:19:33,885 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 37 treesize of output 25 [2021-10-16 03:19:34,118 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 43 treesize of output 31 [2021-10-16 03:19:34,124 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 28 treesize of output 20 [2021-10-16 03:19:34,278 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 24 treesize of output 16 [2021-10-16 03:19:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:19:34,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:34,353 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 76 treesize of output 72 [2021-10-16 03:19:34,360 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 106 treesize of output 98 [2021-10-16 03:19:34,365 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:34,367 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-16 03:19:35,911 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:35,912 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-16 03:19:57,932 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:57,934 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-16 03:20:17,153 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse5 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse4 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (= (select (select (let ((.cse0 (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))) (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse3 v_DerPreprocessor_13))) (.cse2 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse3 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse1 .cse2 (store (select .cse1 .cse2) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse0 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0) .cse4 .cse5) (and (or (not .cse5) (not .cse4)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse9 v_DerPreprocessor_13))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0)))))) is different from false [2021-10-16 03:20:19,627 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse1 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse0 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and .cse0 .cse1 (= (select (select (let ((.cse2 (let ((.cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base|) .cse5 v_DerPreprocessor_13))) (.cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse5 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse3 .cse4 (store (select .cse3 .cse4) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset|) c_ULTIMATE.start_main_~data~0)) (and (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= c_ULTIMATE.start_main_~data~0 (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base|) .cse9 v_DerPreprocessor_13))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147))) (or (not .cse1) (not .cse0)))))) is different from false [2021-10-16 03:20:22,102 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (v_DerPreprocessor_13 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse0 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= c_ULTIMATE.start_main_~data~0 (select (select (let ((.cse2 (let ((.cse5 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse3 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse5 v_DerPreprocessor_13))) (.cse4 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse5 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse3 .cse4 (store (select .cse3 .cse4) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147)))) (and (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_node_create_~temp~0.offset))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_int| c_ULTIMATE.start_node_create_~temp~0.base) .cse9 v_DerPreprocessor_13))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_node_create_~temp~0.base) .cse9 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_node_create_~temp~0.base) c_ULTIMATE.start_node_create_~temp~0.offset) c_ULTIMATE.start_main_~data~0) .cse1 .cse0)))) is different from false [2021-10-16 03:20:22,132 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 6702 treesize of output 6670 [2021-10-16 03:20:22,173 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:20:22,227 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8414 [2021-10-16 03:20:22,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:20:22,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120778244] [2021-10-16 03:20:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:20:22,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:20:22,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:20:22,274 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:20:22,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-16 03:20:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:20:23,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-16 03:20:23,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:20:23,316 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 [2021-10-16 03:20:23,472 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-10-16 03:20:23,472 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 [2021-10-16 03:20:24,076 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-10-16 03:20:24,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 57 [2021-10-16 03:20:25,714 INFO L354 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2021-10-16 03:20:25,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 54 [2021-10-16 03:20:26,034 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 0 case distinctions, treesize of input 30 treesize of output 25 [2021-10-16 03:20:26,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:20:26,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2021-10-16 03:20:26,676 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 [2021-10-16 03:20:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:20:26,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:20:26,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:20:26,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 40 [2021-10-16 03:20:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:20:27,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2021-10-16 03:20:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:20:27,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-10-16 03:20:28,366 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2021-10-16 03:20:28,687 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-16 03:20:28,687 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 35 treesize of output 19 [2021-10-16 03:20:28,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2021-10-16 03:20:28,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 38 treesize of output 34 [2021-10-16 03:20:29,012 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-10-16 03:20:29,012 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 35 treesize of output 23 [2021-10-16 03:20:29,216 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 41 treesize of output 29 [2021-10-16 03:20:29,219 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 26 treesize of output 18 [2021-10-16 03:20:29,615 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 [2021-10-16 03:20:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:20:29,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:20:29,669 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 76 treesize of output 72 [2021-10-16 03:20:29,673 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 106 treesize of output 98 [2021-10-16 03:20:29,676 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:20:29,677 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-16 03:20:31,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:20:31,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 88 [2021-10-16 03:20:59,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:20:59,897 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 280 [2021-10-16 03:21:02,385 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse5 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (.cse4 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset))) (or (and (= (select (select (let ((.cse0 (let ((.cse3 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))) (let ((.cse1 (store |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse3 v_DerPreprocessor_17))) (.cse2 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse3 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse1 .cse2 (store (select .cse1 .cse2) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse0 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse0 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) c_ULTIMATE.start_dll_prepend_~new_head~1.base) c_ULTIMATE.start_dll_prepend_~new_head~1.offset) c_ULTIMATE.start_main_~data~0) .cse4 .cse5) (and (or (not .cse5) (not .cse4)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))) (let ((.cse7 (store |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_int| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse9 v_DerPreprocessor_17))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base (store (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~new_head~1.base) .cse9 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0)))))) is different from false [2021-10-16 03:21:05,428 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_7 (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem10.base| (_ BitVec 32)) (|ULTIMATE.start_dll_prepend_#t~mem12.offset| (_ BitVec 32)) (v_DerPreprocessor_17 (_ BitVec 32)) (v_DerPreprocessor_8 (_ BitVec 32))) (let ((.cse1 (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset)) (.cse0 (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|))) (or (and (or (not .cse0) (not .cse1)) (forall ((v_arrayElimCell_146 (_ BitVec 32)) (v_arrayElimCell_147 (_ BitVec 32))) (= (select (select (let ((.cse2 (let ((.cse5 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base|) .cse5 v_DerPreprocessor_17))) (.cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse5 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse3 .cse4 (store (select .cse3 .cse4) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse2 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) v_arrayElimCell_146) v_arrayElimCell_147) c_ULTIMATE.start_main_~data~0))) (and .cse1 .cse0 (= (select (select (let ((.cse6 (let ((.cse9 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_int| |c_ULTIMATE.start_node_create_#res.base|) .cse9 v_DerPreprocessor_17))) (.cse8 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse9 |ULTIMATE.start_dll_prepend_#t~mem10.base|)) c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) |ULTIMATE.start_dll_prepend_#t~mem12.offset|) v_DerPreprocessor_8)))))) (store .cse6 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse6 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset v_DerPreprocessor_7))) |c_ULTIMATE.start_node_create_#res.base|) |c_ULTIMATE.start_node_create_#res.offset|) c_ULTIMATE.start_main_~data~0))))) is different from false [2021-10-16 03:21:18,481 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:21:18,482 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 328 [2021-10-16 03:21:18,488 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 11444 treesize of output 11380 [2021-10-16 03:21:18,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:21:18,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:21:18,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:21:18,520 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:21:18,520 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:21:18,527 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:21:18,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 03:21:18,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 03:21:18,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-16 03:21:18,529 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-16 03:21:18,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-16 03:21:18,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-16 03:21:18,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION [2021-10-16 03:21:18,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-16 03:21:18,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-16 03:21:18,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION [2021-10-16 03:21:18,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION [2021-10-16 03:21:18,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION [2021-10-16 03:21:18,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION [2021-10-16 03:21:18,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION [2021-10-16 03:21:18,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION [2021-10-16 03:21:18,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION [2021-10-16 03:21:18,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATION [2021-10-16 03:21:18,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATION [2021-10-16 03:21:18,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATION [2021-10-16 03:21:18,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATION [2021-10-16 03:21:18,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATION [2021-10-16 03:21:18,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATION [2021-10-16 03:21:18,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATION [2021-10-16 03:21:18,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23REQUIRES_VIOLATION [2021-10-16 03:21:18,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATION [2021-10-16 03:21:18,533 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATION [2021-10-16 03:21:18,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26REQUIRES_VIOLATION [2021-10-16 03:21:18,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27REQUIRES_VIOLATION [2021-10-16 03:21:18,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28REQUIRES_VIOLATION [2021-10-16 03:21:18,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29REQUIRES_VIOLATION [2021-10-16 03:21:18,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30REQUIRES_VIOLATION [2021-10-16 03:21:18,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31REQUIRES_VIOLATION [2021-10-16 03:21:18,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32REQUIRES_VIOLATION [2021-10-16 03:21:18,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33REQUIRES_VIOLATION [2021-10-16 03:21:18,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34REQUIRES_VIOLATION [2021-10-16 03:21:18,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35REQUIRES_VIOLATION [2021-10-16 03:21:18,535 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:21:18,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:21:18,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE [2021-10-16 03:21:18,536 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:21:18,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-10-16 03:21:18,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-16 03:21:18,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-10-16 03:21:19,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:21:19,148 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:21:19,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:21:19 BoogieIcfgContainer [2021-10-16 03:21:19,164 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:21:19,164 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:21:19,164 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:21:19,165 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:21:19,174 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:11:28" (3/4) ... [2021-10-16 03:21:19,178 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:21:19,178 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:21:19,179 INFO L168 Benchmark]: Toolchain (without parser) took 592555.33 ms. Allocated memory was 60.8 MB in the beginning and 383.8 MB in the end (delta: 323.0 MB). Free memory was 37.1 MB in the beginning and 166.5 MB in the end (delta: -129.4 MB). Peak memory consumption was 195.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:21:19,179 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 60.8 MB. Free memory was 41.8 MB in the beginning and 41.8 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:21:19,180 INFO L168 Benchmark]: CACSL2BoogieTranslator took 757.63 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 35.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:21:19,180 INFO L168 Benchmark]: Boogie Procedure Inliner took 114.97 ms. Allocated memory is still 60.8 MB. Free memory was 35.5 MB in the beginning and 33.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:21:19,180 INFO L168 Benchmark]: Boogie Preprocessor took 75.31 ms. Allocated memory is still 60.8 MB. Free memory was 33.3 MB in the beginning and 31.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:21:19,183 INFO L168 Benchmark]: RCFGBuilder took 1097.20 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 31.4 MB in the beginning and 54.0 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 03:21:19,183 INFO L168 Benchmark]: TraceAbstraction took 590475.50 ms. Allocated memory was 86.0 MB in the beginning and 383.8 MB in the end (delta: 297.8 MB). Free memory was 53.3 MB in the beginning and 166.5 MB in the end (delta: -113.2 MB). Peak memory consumption was 185.0 MB. Max. memory is 16.1 GB. [2021-10-16 03:21:19,184 INFO L168 Benchmark]: Witness Printer took 13.58 ms. Allocated memory is still 383.8 MB. Free memory is still 166.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:21:19,186 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 60.8 MB. Free memory was 41.8 MB in the beginning and 41.8 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 757.63 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 35.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 114.97 ms. Allocated memory is still 60.8 MB. Free memory was 35.5 MB in the beginning and 33.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 75.31 ms. Allocated memory is still 60.8 MB. Free memory was 33.3 MB in the beginning and 31.4 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1097.20 ms. Allocated memory was 60.8 MB in the beginning and 86.0 MB in the end (delta: 25.2 MB). Free memory was 31.4 MB in the beginning and 54.0 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 590475.50 ms. Allocated memory was 86.0 MB in the beginning and 383.8 MB in the end (delta: 297.8 MB). Free memory was 53.3 MB in the beginning and 166.5 MB in the end (delta: -113.2 MB). Peak memory consumption was 185.0 MB. Max. memory is 16.1 GB. * Witness Printer took 13.58 ms. Allocated memory is still 383.8 MB. Free memory is still 166.5 MB. There was no memory consumed. 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 - UnprovableResult [Line: 638]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: unable to decide satisfiability of path constraint, overapproximation of memtrack at line 638. Possible FailurePath: [L619] const int len = 2; [L620] const int data = 1; [L621] DLL s = dll_create(len, data); [L586] DLL head = ((void *)0); [L587] COND TRUE len > 0 [L588] DLL new_head = (DLL) malloc(sizeof(struct node)); [L589] COND FALSE !(((void *)0) == new_head) [L592] new_head->data = data [L593] new_head->next = head [L594] new_head->prev = ((void *)0) [L595] COND FALSE !(\read(head)) [L598] head = new_head [L599] len-- [L587] COND TRUE len > 0 [L588] DLL new_head = (DLL) malloc(sizeof(struct node)); [L589] COND FALSE !(((void *)0) == new_head) [L592] new_head->data = data [L593] new_head->next = head [L594] new_head->prev = ((void *)0) [L595] COND TRUE \read(head) [L596] head->prev = new_head [L598] head = new_head [L599] len-- [L587] COND FALSE !(len > 0) [L601] return head; [L621] DLL s = dll_create(len, data); [L576] DLL temp = (DLL) malloc(sizeof(struct node)); [L577] COND FALSE !(((void *)0) == temp) [L580] temp->next = ((void *)0) [L581] temp->prev = ((void *)0) [L582] temp->data = data [L583] return temp; [L611] DLL new_head = node_create(data); [L612] EXPR \read(*head) [L612] new_head->next = *head [L613] EXPR \read(*head) [L613] COND TRUE *head [L614] EXPR \read(*head) [L614] (*head)->prev = new_head [L616] *head = new_head [L623] EXPR \read(s) [L623] DLL ptr = s; [L624] int count = 0; [L625] COND TRUE \read(ptr) [L626] EXPR ptr->next [L626] DLL temp = ptr->next; [L627] EXPR ptr->data [L627] COND TRUE data != ptr->data [L638] reach_error() - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 593]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 596]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 580]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 613]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 614]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 616]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 623]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 626]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 627]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 636]: 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: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 606]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 618]: 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, 91 locations, 41 error locations. Started 1 CEGAR loops. OverallTime: 590369.2ms, OverallIterations: 20, TraceHistogramMax: 2, EmptinessCheckTime: 31.6ms, AutomataDifference: 87882.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1023 SDtfs, 3332 SDslu, 1257 SDs, 0 SdLazy, 1945 SolverSat, 199 SolverUnsat, 19 SolverUnknown, 0 SolverNotchecked, 54620.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1164 GetRequests, 935 SyntacticMatches, 11 SemanticMatches, 218 ConstructedPredicates, 8 IntricatePredicates, 1 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 235786.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=0, 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: 154.4ms AutomataMinimizationTime, 19 MinimizatonAttempts, 296 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 323.8ms SsaConstructionTime, 2653.2ms SatisfiabilityAnalysisTime, 234938.6ms InterpolantComputationTime, 554 NumberOfCodeBlocks, 554 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1058 ConstructedInterpolants, 241 QuantifiedInterpolants, 14422 SizeOfPredicates, 173 NumberOfNonLiveVariables, 3180 ConjunctsInSsa, 209 ConjunctsInUnsatCore, 50 InterpolantComputations, 28 PerfectInterpolantSequences, 223/342 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 could not prove your program: unable to determine feasibility of some traces [2021-10-16 03:21:19,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b5b7fefd-a94c-4408-b465-d1e3f2cc42da/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...