./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/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_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --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_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/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_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --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 03:02:36,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:02:36,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:02:36,954 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:02:36,954 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:02:36,956 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:02:36,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:02:36,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:02:36,962 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:02:36,963 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:02:36,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:02:36,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:02:36,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:02:36,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:02:36,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:02:36,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:02:36,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:02:36,974 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:02:36,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:02:36,984 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:02:36,986 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:02:36,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:02:36,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:02:36,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:02:36,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:02:37,000 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:02:37,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:02:37,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:02:37,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:02:37,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:02:37,004 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:02:37,005 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:02:37,006 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:02:37,007 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:02:37,008 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:02:37,008 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:02:37,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:02:37,009 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:02:37,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:02:37,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:02:37,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:02:37,012 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 03:02:37,039 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:02:37,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:02:37,041 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:02:37,041 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:02:37,041 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:02:37,041 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:02:37,041 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:02:37,042 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:02:37,042 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:02:37,042 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:02:37,042 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:02:37,042 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:02:37,042 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:02:37,043 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:02:37,043 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:02:37,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:02:37,044 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:02:37,044 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:02:37,044 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:02:37,044 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:02:37,044 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:02:37,045 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:02:37,045 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:02:37,045 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:02:37,045 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:02:37,045 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:02:37,045 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:02:37,046 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:02:37,046 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:02:37,046 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:02:37,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:02:37,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:02:37,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:02:37,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:02:37,047 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:02:37,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:02:37,047 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:02:37,048 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:02:37,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:02:37,048 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_b230c345-6d27-40f6-9291-1dc27163014b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-16 03:02:37,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:02:37,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:02:37,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:02:37,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:02:37,363 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:02:37,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:02:37,433 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/fccb499e4/e433eb65f3844f698132014c705af7cf/FLAGfa2e3cf21 [2021-10-16 03:02:38,107 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:02:38,112 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:02:38,125 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/fccb499e4/e433eb65f3844f698132014c705af7cf/FLAGfa2e3cf21 [2021-10-16 03:02:38,365 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/fccb499e4/e433eb65f3844f698132014c705af7cf [2021-10-16 03:02:38,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:02:38,372 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:02:38,375 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:02:38,375 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:02:38,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:02:38,381 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,383 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17acfc05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38, skipping insertion in model container [2021-10-16 03:02:38,383 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:02:38,450 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:02:38,774 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_b230c345-6d27-40f6-9291-1dc27163014b/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:02:38,777 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:02:38,786 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:02:38,851 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_b230c345-6d27-40f6-9291-1dc27163014b/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:02:38,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:02:38,889 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:02:38,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38 WrapperNode [2021-10-16 03:02:38,890 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:02:38,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:02:38,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:02:38,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:02:38,900 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:02:38,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:02:38,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:02:38,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:02:38,980 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:38,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:39,003 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:02:39,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:02:39,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:02:39,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:02:39,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (1/1) ... [2021-10-16 03:02:39,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:02:39,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:02:39,054 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:02:39,057 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:02:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 03:02:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:02:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:02:39,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:02:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:02:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:02:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:02:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 03:02:39,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 03:02:39,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:02:39,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:02:39,950 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:02:39,950 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-16 03:02:39,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:02:39 BoogieIcfgContainer [2021-10-16 03:02:39,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:02:39,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:02:39,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:02:39,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:02:39,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:02:38" (1/3) ... [2021-10-16 03:02:39,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4120f4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:02:39, skipping insertion in model container [2021-10-16 03:02:39,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:38" (2/3) ... [2021-10-16 03:02:39,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4120f4b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:02:39, skipping insertion in model container [2021-10-16 03:02:39,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:02:39" (3/3) ... [2021-10-16 03:02:39,963 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-16 03:02:39,969 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:02:39,969 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:02:40,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:02:40,037 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 03:02:40,037 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:02:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:02:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:02:40,057 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:40,057 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:02:40,058 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:40,064 INFO L82 PathProgramCache]: Analyzing trace with hash -474777874, now seen corresponding path program 1 times [2021-10-16 03:02:40,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:02:40,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721542952] [2021-10-16 03:02:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:40,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:02:40,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:40,258 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 03:02:40,259 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:02:40,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721542952] [2021-10-16 03:02:40,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721542952] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:02:40,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:02:40,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:02:40,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752778576] [2021-10-16 03:02:40,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:02:40,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:02:40,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:02:40,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:02:40,291 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 03:02:40,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:02:40,342 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-10-16 03:02:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:02:40,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-10-16 03:02:40,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:02:40,353 INFO L225 Difference]: With dead ends: 27 [2021-10-16 03:02:40,353 INFO L226 Difference]: Without dead ends: 11 [2021-10-16 03:02:40,356 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:02:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-16 03:02:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2021-10-16 03:02:40,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:02:40,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2021-10-16 03:02:40,386 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2021-10-16 03:02:40,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:02:40,387 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2021-10-16 03:02:40,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 03:02:40,387 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2021-10-16 03:02:40,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 03:02:40,388 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:40,388 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:02:40,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:02:40,389 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:40,393 INFO L82 PathProgramCache]: Analyzing trace with hash -885419831, now seen corresponding path program 1 times [2021-10-16 03:02:40,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:02:40,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672681742] [2021-10-16 03:02:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:40,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:02:40,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:40,513 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 03:02:40,514 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:02:40,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672681742] [2021-10-16 03:02:40,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672681742] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:02:40,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302282243] [2021-10-16 03:02:40,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:40,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:02:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:02:40,517 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:02:40,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:02:40,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:40,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 03:02:40,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:40,683 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 03:02:40,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:40,715 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 03:02:40,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302282243] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:02:40,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [798468111] [2021-10-16 03:02:40,737 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-16 03:02:40,737 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:02:40,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:02:40,747 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:02:40,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:02:40,821 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,831 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:02:40,834 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,835 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 03:02:40,837 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:02:40,839 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,841 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:02:40,858 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-16 03:02:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:40,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:40,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-16 03:02:40,912 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,913 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 03:02:40,921 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,922 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-16 03:02:40,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:02:40,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:02:40,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,959 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:40,962 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 143 [2021-10-16 03:02:40,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:02:40,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:140, output treesize:143 [2021-10-16 03:02:41,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:02:41,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:02:41,187 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_37| 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 03:02:41,191 INFO L168 Benchmark]: Toolchain (without parser) took 2818.42 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 56.2 MB in the beginning and 83.0 MB in the end (delta: -26.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:02:41,192 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 73.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:02:41,192 INFO L168 Benchmark]: CACSL2BoogieTranslator took 515.48 ms. Allocated memory is still 98.6 MB. Free memory was 56.0 MB in the beginning and 66.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:41,193 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.02 ms. Allocated memory is still 98.6 MB. Free memory was 66.1 MB in the beginning and 63.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:41,194 INFO L168 Benchmark]: Boogie Preprocessor took 30.58 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 62.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:41,194 INFO L168 Benchmark]: RCFGBuilder took 948.95 ms. Allocated memory is still 98.6 MB. Free memory was 62.2 MB in the beginning and 73.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:41,195 INFO L168 Benchmark]: TraceAbstraction took 1235.69 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 72.9 MB in the beginning and 83.0 MB in the end (delta: -10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:02:41,199 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 98.6 MB. Free memory is still 73.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 515.48 ms. Allocated memory is still 98.6 MB. Free memory was 56.0 MB in the beginning and 66.1 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.02 ms. Allocated memory is still 98.6 MB. Free memory was 66.1 MB in the beginning and 63.8 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.58 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 62.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 948.95 ms. Allocated memory is still 98.6 MB. Free memory was 62.2 MB in the beginning and 73.3 MB in the end (delta: -11.1 MB). Peak memory consumption was 30.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1235.69 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 72.9 MB in the beginning and 83.0 MB in the end (delta: -10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_37| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_37|: 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 03:02:41,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/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 03:02:43,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:02:43,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:02:43,672 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:02:43,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:02:43,676 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:02:43,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:02:43,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:02:43,690 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:02:43,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:02:43,700 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:02:43,702 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:02:43,702 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:02:43,705 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:02:43,708 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:02:43,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:02:43,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:02:43,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:02:43,720 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:02:43,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:02:43,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:02:43,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:02:43,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:02:43,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:02:43,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:02:43,746 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:02:43,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:02:43,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:02:43,748 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:02:43,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:02:43,752 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:02:43,753 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:02:43,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:02:43,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:02:43,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:02:43,758 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:02:43,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:02:43,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:02:43,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:02:43,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:02:43,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:02:43,767 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 03:02:43,818 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:02:43,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:02:43,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:02:43,820 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:02:43,820 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:02:43,821 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:02:43,821 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:02:43,821 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:02:43,821 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:02:43,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:02:43,824 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:02:43,824 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:02:43,824 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:02:43,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 03:02:43,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:02:43,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 03:02:43,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:02:43,825 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 03:02:43,825 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 03:02:43,825 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:02:43,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 03:02:43,826 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:02:43,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 03:02:43,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:02:43,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 03:02:43,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:02:43,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:02:43,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:02:43,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:02:43,827 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 03:02:43,828 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 03:02:43,828 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 03:02:43,828 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 03:02:43,828 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:02:43,829 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:02:43,829 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_b230c345-6d27-40f6-9291-1dc27163014b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8c82ac198a2cdefe88b8a30e2f9953153e9db943 [2021-10-16 03:02:44,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:02:44,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:02:44,294 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:02:44,295 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:02:44,296 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:02:44,297 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:02:44,384 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/6ad900380/1f0d0ed06ba446958914cb79d74338e9/FLAG86a1f93cc [2021-10-16 03:02:45,049 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:02:45,050 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i [2021-10-16 03:02:45,070 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/6ad900380/1f0d0ed06ba446958914cb79d74338e9/FLAG86a1f93cc [2021-10-16 03:02:45,329 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/data/6ad900380/1f0d0ed06ba446958914cb79d74338e9 [2021-10-16 03:02:45,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:02:45,333 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:02:45,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:02:45,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:02:45,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:02:45,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1082332a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45, skipping insertion in model container [2021-10-16 03:02:45,344 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:02:45,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:02:45,792 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_b230c345-6d27-40f6-9291-1dc27163014b/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:02:45,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:02:45,819 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:02:45,865 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_b230c345-6d27-40f6-9291-1dc27163014b/sv-benchmarks/c/list-simple/dll2n_prepend_equal.i[24361,24374] [2021-10-16 03:02:45,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:02:45,914 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:02:45,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45 WrapperNode [2021-10-16 03:02:45,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:02:45,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:02:45,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:02:45,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:02:45,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,943 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,969 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:02:45,970 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:02:45,970 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:02:45,970 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:02:45,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,983 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:45,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:46,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:46,006 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:02:46,007 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:02:46,007 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:02:46,007 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:02:46,008 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (1/1) ... [2021-10-16 03:02:46,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:02:46,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:02:46,047 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:02:46,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:02:46,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 03:02:46,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-10-16 03:02:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 03:02:46,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:02:46,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:02:46,675 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:02:46,676 INFO L299 CfgBuilder]: Removed 19 assume(true) statements. [2021-10-16 03:02:46,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:02:46 BoogieIcfgContainer [2021-10-16 03:02:46,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:02:46,680 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:02:46,680 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:02:46,683 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:02:46,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:02:45" (1/3) ... [2021-10-16 03:02:46,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c610b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:02:46, skipping insertion in model container [2021-10-16 03:02:46,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:02:45" (2/3) ... [2021-10-16 03:02:46,685 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70c610b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:02:46, skipping insertion in model container [2021-10-16 03:02:46,685 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:02:46" (3/3) ... [2021-10-16 03:02:46,687 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_prepend_equal.i [2021-10-16 03:02:46,692 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:02:46,693 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 03:02:46,740 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:02:46,746 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=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 03:02:46,746 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 03:02:46,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 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 03:02:46,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:02:46,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:46,768 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:02:46,769 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:46,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:46,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1295164731, now seen corresponding path program 1 times [2021-10-16 03:02:46,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:02:46,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [481205571] [2021-10-16 03:02:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:46,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:02:46,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:02:46,793 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:02:46,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 03:02:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 03:02:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:47,035 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 03:02:47,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:47,070 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 03:02:47,071 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:02:47,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [481205571] [2021-10-16 03:02:47,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [481205571] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:02:47,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:02:47,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 03:02:47,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40389821] [2021-10-16 03:02:47,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 03:02:47,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:02:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 03:02:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:02:47,096 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.52) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 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 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:02:47,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:02:47,113 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-16 03:02:47,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 03:02:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-16 03:02:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:02:47,123 INFO L225 Difference]: With dead ends: 46 [2021-10-16 03:02:47,123 INFO L226 Difference]: Without dead ends: 20 [2021-10-16 03:02:47,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 03:02:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-16 03:02:47,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-16 03:02:47,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:02:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-16 03:02:47,163 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 14 [2021-10-16 03:02:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:02:47,163 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-16 03:02:47,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:02:47,164 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-16 03:02:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 03:02:47,165 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:47,165 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:02:47,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-16 03:02:47,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:02:47,368 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:47,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:47,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1295173380, now seen corresponding path program 1 times [2021-10-16 03:02:47,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:02:47,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1187554362] [2021-10-16 03:02:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:47,370 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:02:47,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:02:47,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:02:47,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 03:02:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:47,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 03:02:47,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:47,632 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 03:02:47,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:47,696 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 03:02:47,696 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:02:47,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1187554362] [2021-10-16 03:02:47,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1187554362] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:02:47,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:02:47,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 03:02:47,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610379630] [2021-10-16 03:02:47,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:02:47,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:02:47,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:02:47,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:02:47,701 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 03:02:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:02:47,754 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2021-10-16 03:02:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:02:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 14 [2021-10-16 03:02:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:02:47,756 INFO L225 Difference]: With dead ends: 39 [2021-10-16 03:02:47,756 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 03:02:47,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:02:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 03:02:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 03:02:47,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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 03:02:47,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-16 03:02:47,762 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 14 [2021-10-16 03:02:47,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:02:47,763 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-16 03:02:47,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 03:02:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-16 03:02:47,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:02:47,781 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:47,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:02:47,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 03:02:47,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:02:47,982 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:47,983 INFO L82 PathProgramCache]: Analyzing trace with hash -964558884, now seen corresponding path program 1 times [2021-10-16 03:02:47,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:02:47,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1881209257] [2021-10-16 03:02:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:47,984 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:02:47,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:02:47,985 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:02:47,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 03:02:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:48,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:02:48,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 03:02:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 03:02:48,424 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:02:48,424 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1881209257] [2021-10-16 03:02:48,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1881209257] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:02:48,424 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:02:48,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-16 03:02:48,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519288533] [2021-10-16 03:02:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:02:48,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:02:48,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:02:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:02:48,435 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:02:48,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:02:48,526 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-10-16 03:02:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:02:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 03:02:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:02:48,529 INFO L225 Difference]: With dead ends: 47 [2021-10-16 03:02:48,530 INFO L226 Difference]: Without dead ends: 27 [2021-10-16 03:02:48,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:02:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-16 03:02:48,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-16 03:02:48,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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 03:02:48,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-10-16 03:02:48,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 24 [2021-10-16 03:02:48,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:02:48,535 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-10-16 03:02:48,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 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 03:02:48,536 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-10-16 03:02:48,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:02:48,536 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:48,537 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:02:48,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 03:02:48,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:02:48,738 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:48,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:48,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1641464670, now seen corresponding path program 1 times [2021-10-16 03:02:48,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:02:48,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [865679777] [2021-10-16 03:02:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:48,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:02:48,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:02:48,742 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:02:48,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 03:02:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:48,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 03:02:48,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:49,190 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 03:02:49,224 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 03:02:49,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:02:49,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:49,269 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 03:02:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-16 03:02:49,393 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:02:49,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [865679777] [2021-10-16 03:02:49,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [865679777] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 03:02:49,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:02:49,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-10-16 03:02:49,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508073333] [2021-10-16 03:02:49,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-16 03:02:49,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:02:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-16 03:02:49,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:02:49,398 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:02:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:02:49,767 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-10-16 03:02:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-16 03:02:49,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 03:02:49,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:02:49,769 INFO L225 Difference]: With dead ends: 33 [2021-10-16 03:02:49,769 INFO L226 Difference]: Without dead ends: 30 [2021-10-16 03:02:49,770 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-16 03:02:49,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-16 03:02:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-10-16 03:02:49,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 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 03:02:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-16 03:02:49,775 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 24 [2021-10-16 03:02:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:02:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-16 03:02:49,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 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 03:02:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-16 03:02:49,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:02:49,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:02:49,777 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:02:49,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 03:02:49,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:02:49,992 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:02:49,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:02:49,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1641466344, now seen corresponding path program 1 times [2021-10-16 03:02:49,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:02:49,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [704834254] [2021-10-16 03:02:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:02:49,993 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:02:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:02:49,995 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:02:50,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 03:02:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:02:50,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-16 03:02:50,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:02:50,404 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 03:02:50,487 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 13 treesize of output 9 [2021-10-16 03:02:50,859 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-16 03:02:50,860 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 38 treesize of output 38 [2021-10-16 03:02:51,129 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 03:02:51,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:51,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:51,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:51,411 INFO L354 Elim1Store]: treesize reduction 196, result has 26.0 percent of original size [2021-10-16 03:02:51,411 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 3 case distinctions, treesize of input 49 treesize of output 94 [2021-10-16 03:02:51,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:51,866 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 03:02:51,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:51,952 INFO L354 Elim1Store]: treesize reduction 42, result has 34.4 percent of original size [2021-10-16 03:02:51,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 50 [2021-10-16 03:02:52,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:02:52,276 INFO L354 Elim1Store]: treesize reduction 15, result has 48.3 percent of original size [2021-10-16 03:02:52,276 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 79 treesize of output 59 [2021-10-16 03:02:52,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2021-10-16 03:02:52,316 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-10-16 03:02:52,317 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 45 treesize of output 29 [2021-10-16 03:02:52,507 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 03:02:52,545 INFO L354 Elim1Store]: treesize reduction 41, result has 21.2 percent of original size [2021-10-16 03:02:52,545 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 03:02:52,565 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 11 treesize of output 7 [2021-10-16 03:02:52,683 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 03:02:52,688 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 03:02:52,802 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 03:02:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:02:52,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:02:53,037 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 03:02:53,042 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 03:02:53,049 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:53,052 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 114 [2021-10-16 03:02:53,874 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:02:53,876 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2021-10-16 03:02:53,880 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 136 treesize of output 120 [2021-10-16 03:03:04,250 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:03:04,251 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 312 [2021-10-16 03:03:22,278 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 3280 treesize of output 3272 [2021-10-16 03:03:22,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:03:22,421 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5354 [2021-10-16 03:03:32,759 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 3072279 treesize of output 3039251 [2021-10-16 03:03:47,937 WARN L207 SmtUtils]: Spent 15.18 s on a formula simplification that was a NOOP. DAG size: 463 [2021-10-16 03:05:43,518 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 11 treesize of output 9 [2021-10-16 03:05:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:05:43,667 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:43,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [704834254] [2021-10-16 03:05:43,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [704834254] provided 1 perfect and 1 imperfect interpolant sequences [2021-10-16 03:05:43,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-16 03:05:43,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 26 [2021-10-16 03:05:43,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242160467] [2021-10-16 03:05:43,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-16 03:05:43,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:43,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-16 03:05:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=568, Unknown=6, NotChecked=0, Total=650 [2021-10-16 03:05:43,669 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:05:54,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:54,187 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2021-10-16 03:05:54,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-16 03:05:54,188 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 03:05:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:54,189 INFO L225 Difference]: With dead ends: 49 [2021-10-16 03:05:54,189 INFO L226 Difference]: Without dead ends: 47 [2021-10-16 03:05:54,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 31553.5ms TimeCoverageRelationStatistics Valid=184, Invalid=1070, Unknown=6, NotChecked=0, Total=1260 [2021-10-16 03:05:54,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-16 03:05:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 39. [2021-10-16 03:05:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:05:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-10-16 03:05:54,198 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2021-10-16 03:05:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:54,199 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-10-16 03:05:54,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:05:54,199 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-10-16 03:05:54,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-16 03:05:54,200 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:54,200 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:54,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:54,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 03:05:54,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:05:54,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:54,407 INFO L82 PathProgramCache]: Analyzing trace with hash 630349094, now seen corresponding path program 1 times [2021-10-16 03:05:54,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:54,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [767479158] [2021-10-16 03:05:54,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:54,408 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:54,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:54,409 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:54,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 03:05:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:54,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:05:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:54,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:54,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:54,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:54,739 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:05:54,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [767479158] [2021-10-16 03:05:54,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [767479158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:05:54,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1908246158] [2021-10-16 03:05:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:54,740 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:05:54,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:05:54,741 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:05:54,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 03:05:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:55,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:05:55,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:55,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:55,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1908246158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:05:55,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391300543] [2021-10-16 03:05:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:55,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:05:55,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:05:55,140 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:05:55,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 03:05:55,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:55,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:05:55,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:55,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:05:55,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391300543] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:05:55,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 03:05:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 4 [2021-10-16 03:05:55,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516690033] [2021-10-16 03:05:55,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 03:05:55,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 03:05:55,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 03:05:55,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 03:05:55,482 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:05:55,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:05:55,610 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-10-16 03:05:55,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 03:05:55,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-16 03:05:55,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:05:55,612 INFO L225 Difference]: With dead ends: 59 [2021-10-16 03:05:55,612 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 03:05:55,612 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-16 03:05:55,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 03:05:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-16 03:05:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 03:05:55,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-16 03:05:55,619 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2021-10-16 03:05:55,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:05:55,619 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-16 03:05:55,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:05:55,620 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-16 03:05:55,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 03:05:55,620 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:05:55,621 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 03:05:55,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:55,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:56,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 03:05:56,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 03:05:56,248 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 03:05:56,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:05:56,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1196191993, now seen corresponding path program 1 times [2021-10-16 03:05:56,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 03:05:56,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [655466997] [2021-10-16 03:05:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:05:56,249 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 03:05:56,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 03:05:56,250 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 03:05:56,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 03:05:56,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:05:56,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-16 03:05:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:05:56,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:05:56,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-10-16 03:05:56,952 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-10-16 03:05:56,952 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 46 treesize of output 46 [2021-10-16 03:05:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:57,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:57,359 INFO L354 Elim1Store]: treesize reduction 196, result has 26.0 percent of original size [2021-10-16 03:05:57,360 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 3 case distinctions, treesize of input 59 treesize of output 98 [2021-10-16 03:05:57,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:57,757 INFO L354 Elim1Store]: treesize reduction 45, result has 29.7 percent of original size [2021-10-16 03:05:57,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 51 [2021-10-16 03:05:57,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:05:58,066 INFO L354 Elim1Store]: treesize reduction 134, result has 23.0 percent of original size [2021-10-16 03:05:58,066 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 70 [2021-10-16 03:05:58,072 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 82 treesize of output 74 [2021-10-16 03:05:58,387 INFO L354 Elim1Store]: treesize reduction 130, result has 22.6 percent of original size [2021-10-16 03:05:58,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 81 [2021-10-16 03:05:58,447 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 03:05:58,556 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 92 treesize of output 84 [2021-10-16 03:05:58,788 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-16 03:05:58,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 30 [2021-10-16 03:05:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:05:58,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:05:59,134 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 82 treesize of output 78 [2021-10-16 03:06:05,410 WARN L207 SmtUtils]: Spent 6.11 s on a formula simplification. DAG size of input: 33 DAG size of output: 30 [2021-10-16 03:06:05,421 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 118 treesize of output 102 [2021-10-16 03:06:05,439 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 118 treesize of output 102 [2021-10-16 03:06:07,462 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_48 (_ BitVec 32))) (not (= (_ bv0 32) (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (bvadd (_ bv8 32) v_arrayElimCell_48) c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (store .cse1 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset))))) (or (forall ((v_arrayElimCell_47 (_ BitVec 32)) (v_arrayElimCell_46 (_ BitVec 32))) (not (= (select (let ((.cse3 (let ((.cse4 (let ((.cse5 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store |c_#memory_$Pointer$.base| .cse5 (store (select |c_#memory_$Pointer$.base| .cse5) (bvadd (_ bv8 32) v_arrayElimCell_47) c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (store .cse4 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse4 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_46)) (_ bv0 32)))) (and (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset) (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)))) is different from false [2021-10-16 03:06:09,531 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_48 (_ BitVec 32))) (not (= (let ((.cse4 (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|))) (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) .cse4 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (let ((.cse3 (select (select .cse2 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse2 .cse3 (store (select .cse2 .cse3) (bvadd (_ bv8 32) v_arrayElimCell_48) |c_ULTIMATE.start_node_create_#res.base|)))))) (store .cse1 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) .cse4)) (_ bv0 32)))) (or (forall ((v_arrayElimCell_47 (_ BitVec 32)) (v_arrayElimCell_46 (_ BitVec 32))) (not (= (select (let ((.cse5 (let ((.cse6 (let ((.cse7 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_node_create_#res.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_node_create_#res.offset|) (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))))) (let ((.cse8 (select (select .cse7 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store .cse7 .cse8 (store (select .cse7 .cse8) (bvadd (_ bv8 32) v_arrayElimCell_47) |c_ULTIMATE.start_node_create_#res.base|)))))) (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 |c_ULTIMATE.start_node_create_#res.base|))))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_46)) (_ bv0 32)))) (and (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset) (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)))) is different from false [2021-10-16 03:06:09,565 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:09,567 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1653 [2021-10-16 03:06:09,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 03:06:09,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [655466997] [2021-10-16 03:06:09,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_arrayElimCell_48 [2021-10-16 03:06:09,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [733790317] [2021-10-16 03:06:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:09,647 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 03:06:09,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 03:06:09,648 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 03:06:09,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 03:06:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:06:10,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-16 03:06:10,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:06:10,244 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 03:06:10,792 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:06:10,792 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 22 treesize of output 22 [2021-10-16 03:06:11,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,121 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-16 03:06:11,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-10-16 03:06:11,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,185 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-10-16 03:06:11,186 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 1 case distinctions, treesize of input 34 treesize of output 34 [2021-10-16 03:06:11,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:11,521 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 43 treesize of output 35 [2021-10-16 03:06:11,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:11,570 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 4 case distinctions, treesize of input 44 treesize of output 36 [2021-10-16 03:06:11,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,912 INFO L354 Elim1Store]: treesize reduction 120, result has 17.8 percent of original size [2021-10-16 03:06:11,912 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 89 treesize of output 81 [2021-10-16 03:06:11,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:06:11,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:11,925 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 3 case distinctions, treesize of input 87 treesize of output 67 [2021-10-16 03:06:12,149 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 03:06:12,161 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-10-16 03:06:12,162 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 51 [2021-10-16 03:06:12,406 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 74 treesize of output 66 [2021-10-16 03:06:13,110 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-16 03:06:13,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 30 [2021-10-16 03:06:13,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:06:13,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:06:13,274 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 82 treesize of output 78 [2021-10-16 03:06:38,484 WARN L207 SmtUtils]: Spent 6.35 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-16 03:06:38,526 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:38,527 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1898 [2021-10-16 03:06:38,531 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:06:38,532 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2151 [2021-10-16 03:06:57,414 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 24279 treesize of output 23695 [2021-10-16 03:06:58,290 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 30613 treesize of output 30201 [2021-10-16 03:06:59,785 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-10-16 03:06:59,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960420994] [2021-10-16 03:06:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:06:59,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:06:59,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:06:59,790 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:06:59,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 03:07:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:07:00,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-16 03:07:00,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:07:00,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-16 03:07:00,648 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-10-16 03:07:00,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-10-16 03:07:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:02,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:02,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:03,019 INFO L354 Elim1Store]: treesize reduction 80, result has 29.2 percent of original size [2021-10-16 03:07:03,019 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 1 case distinctions, treesize of input 42 treesize of output 60 [2021-10-16 03:07:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:03,244 INFO L354 Elim1Store]: treesize reduction 45, result has 29.7 percent of original size [2021-10-16 03:07:03,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 52 treesize of output 51 [2021-10-16 03:07:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 03:07:03,478 INFO L354 Elim1Store]: treesize reduction 134, result has 23.0 percent of original size [2021-10-16 03:07:03,478 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 70 [2021-10-16 03:07:03,485 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 82 treesize of output 74 [2021-10-16 03:07:03,670 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 03:07:03,810 INFO L354 Elim1Store]: treesize reduction 130, result has 22.6 percent of original size [2021-10-16 03:07:03,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 79 treesize of output 81 [2021-10-16 03:07:03,876 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 92 treesize of output 84 [2021-10-16 03:07:04,017 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-10-16 03:07:04,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 30 [2021-10-16 03:07:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 03:07:04,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:07:04,148 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 82 treesize of output 78 [2021-10-16 03:07:04,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 102 [2021-10-16 03:07:04,307 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 118 treesize of output 102 [2021-10-16 03:07:06,325 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_arrayElimCell_98 (_ BitVec 32))) (not (= (select (let ((.cse0 (let ((.cse1 (let ((.cse2 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store |c_#memory_$Pointer$.base| .cse2 (store (select |c_#memory_$Pointer$.base| .cse2) (bvadd (_ bv8 32) v_arrayElimCell_98) c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (store .cse1 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse1 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) c_ULTIMATE.start_dll_prepend_~new_head~1.offset)) (_ bv0 32)))) (or (and (= |c_ULTIMATE.start_main_~#s~0.offset| c_ULTIMATE.start_dll_prepend_~head.offset) (= c_ULTIMATE.start_dll_prepend_~head.base |c_ULTIMATE.start_main_~#s~0.base|)) (forall ((v_arrayElimCell_46 (_ BitVec 32)) (v_arrayElimCell_97 (_ BitVec 32))) (not (= (select (let ((.cse3 (let ((.cse4 (let ((.cse5 (select (select |c_#memory_$Pointer$.base| c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset))) (store |c_#memory_$Pointer$.base| .cse5 (store (select |c_#memory_$Pointer$.base| .cse5) (bvadd (_ bv8 32) v_arrayElimCell_97) c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (store .cse4 c_ULTIMATE.start_dll_prepend_~head.base (store (select .cse4 c_ULTIMATE.start_dll_prepend_~head.base) c_ULTIMATE.start_dll_prepend_~head.offset c_ULTIMATE.start_dll_prepend_~new_head~1.base))))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0.base|) |c_ULTIMATE.start_main_~#s~0.offset|))) (bvadd (_ bv4 32) v_arrayElimCell_46)) (_ bv0 32)))))) is different from false [2021-10-16 03:07:13,397 WARN L207 SmtUtils]: Spent 6.11 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-16 03:07:13,416 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:07:13,418 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1653 [2021-10-16 03:07:13,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: No corresponding IProgramVar for v_arrayElimCell_97 [2021-10-16 03:07:13,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:07:13,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-16 03:07:13,523 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-10-16 03:07:13,523 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-16 03:07:13,530 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 03:07:13,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:13,745 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:13,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 03:07:14,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:07:14,141 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:07:14,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:07:14 BoogieIcfgContainer [2021-10-16 03:07:14,157 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:07:14,158 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:07:14,158 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:07:14,158 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:07:14,159 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:02:46" (3/4) ... [2021-10-16 03:07:14,166 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-16 03:07:14,167 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:07:14,167 INFO L168 Benchmark]: Toolchain (without parser) took 268834.64 ms. Allocated memory was 62.9 MB in the beginning and 356.5 MB in the end (delta: 293.6 MB). Free memory was 41.5 MB in the beginning and 288.0 MB in the end (delta: -246.5 MB). Peak memory consumption was 46.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:07:14,168 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 44.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:07:14,168 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.63 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 38.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 03:07:14,168 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 62.9 MB. Free memory was 38.2 MB in the beginning and 36.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:07:14,169 INFO L168 Benchmark]: Boogie Preprocessor took 36.19 ms. Allocated memory is still 62.9 MB. Free memory was 36.0 MB in the beginning and 34.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:07:14,169 INFO L168 Benchmark]: RCFGBuilder took 671.60 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 34.1 MB in the beginning and 50.7 MB in the end (delta: -16.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2021-10-16 03:07:14,170 INFO L168 Benchmark]: TraceAbstraction took 267477.25 ms. Allocated memory was 77.6 MB in the beginning and 356.5 MB in the end (delta: 278.9 MB). Free memory was 50.1 MB in the beginning and 288.0 MB in the end (delta: -237.9 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:07:14,170 INFO L168 Benchmark]: Witness Printer took 9.01 ms. Allocated memory is still 356.5 MB. Free memory is still 288.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:07:14,172 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 62.9 MB. Free memory is still 44.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 581.63 ms. Allocated memory is still 62.9 MB. Free memory was 41.3 MB in the beginning and 38.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.73 ms. Allocated memory is still 62.9 MB. Free memory was 38.2 MB in the beginning and 36.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.19 ms. Allocated memory is still 62.9 MB. Free memory was 36.0 MB in the beginning and 34.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 671.60 ms. Allocated memory was 62.9 MB in the beginning and 77.6 MB in the end (delta: 14.7 MB). Free memory was 34.1 MB in the beginning and 50.7 MB in the end (delta: -16.6 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 267477.25 ms. Allocated memory was 77.6 MB in the beginning and 356.5 MB in the end (delta: 278.9 MB). Free memory was 50.1 MB in the beginning and 288.0 MB in the end (delta: -237.9 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. * Witness Printer took 9.01 ms. Allocated memory is still 356.5 MB. Free memory is still 288.0 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 call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. 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 FALSE !(data != ptr->data) [L630] ptr = temp [L631] count++ [L625] COND FALSE !(\read(ptr)) [L633] COND TRUE count != 1 + len [L638] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 267400.7ms, OverallIterations: 7, TraceHistogramMax: 2, EmptinessCheckTime: 32.8ms, AutomataDifference: 11229.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 124 SDtfs, 160 SDslu, 183 SDs, 0 SdLazy, 325 SolverSat, 19 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 9118.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 343 GetRequests, 294 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 31770.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=5, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 50.8ms AutomataMinimizationTime, 6 MinimizatonAttempts, 12 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 182.1ms SsaConstructionTime, 553.3ms SatisfiabilityAnalysisTime, 174864.5ms InterpolantComputationTime, 172 NumberOfCodeBlocks, 172 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 328 ConstructedInterpolants, 20 QuantifiedInterpolants, 2111 SizeOfPredicates, 53 NumberOfNonLiveVariables, 883 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 16 InterpolantComputations, 9 PerfectInterpolantSequences, 60/84 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 03:07:14,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b230c345-6d27-40f6-9291-1dc27163014b/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...