./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 02:06:04,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:06:04,258 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:06:04,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:06:04,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:06:04,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:06:04,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:06:04,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:06:04,295 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:06:04,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:06:04,298 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:06:04,299 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:06:04,299 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:06:04,301 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:06:04,302 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:06:04,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:06:04,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:06:04,306 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:06:04,308 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:06:04,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:06:04,312 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:06:04,314 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:06:04,315 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:06:04,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:06:04,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:06:04,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:06:04,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:06:04,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:06:04,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:06:04,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:06:04,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:06:04,326 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:06:04,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:06:04,328 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:06:04,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:06:04,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:06:04,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:06:04,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:06:04,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:06:04,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:06:04,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:06:04,335 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-03 02:06:04,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:06:04,359 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:06:04,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:06:04,360 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:06:04,361 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:06:04,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:06:04,361 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:06:04,362 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:06:04,362 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:06:04,362 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:06:04,362 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:06:04,363 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:06:04,363 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:06:04,363 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:06:04,364 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:06:04,364 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:06:04,364 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:06:04,365 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:06:04,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-03 02:06:04,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-03 02:06:04,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:06:04,367 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:06:04,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-03 02:06:04,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:06:04,368 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:06:04,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:06:04,368 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-03 02:06:04,369 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-03 02:06:04,369 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-03 02:06:04,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:06:04,370 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 02:06:04,370 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:06:04,370 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:06:04,371 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:06:04,371 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:06:04,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:06:04,372 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:06:04,372 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:06:04,372 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:06:04,372 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:06:04,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:06:04,373 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:06:04,373 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cd9bd7b6c1446abd728b90c98a54cb367face4c5994cfeca4979c2dbc50ad4d3 [2022-11-03 02:06:04,655 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:06:04,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:06:04,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:06:04,684 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:06:04,684 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:06:04,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-11-03 02:06:04,765 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/data/5bd30d626/b05a62cb73f4459b93c1c3a96ffa20fb/FLAGf5ff660db [2022-11-03 02:06:05,257 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:06:05,264 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/sv-benchmarks/c/list-simple/sll2c_remove_all.i [2022-11-03 02:06:05,276 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/data/5bd30d626/b05a62cb73f4459b93c1c3a96ffa20fb/FLAGf5ff660db [2022-11-03 02:06:05,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/data/5bd30d626/b05a62cb73f4459b93c1c3a96ffa20fb [2022-11-03 02:06:05,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:06:05,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:06:05,592 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:06:05,592 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:06:05,597 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:06:05,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:06:05" (1/1) ... [2022-11-03 02:06:05,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@541c8397 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:05, skipping insertion in model container [2022-11-03 02:06:05,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:06:05" (1/1) ... [2022-11-03 02:06:05,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:06:05,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:06:05,940 WARN L230 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_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2022-11-03 02:06:05,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:06:05,952 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:06:06,010 WARN L230 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_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/sv-benchmarks/c/list-simple/sll2c_remove_all.i[24082,24095] [2022-11-03 02:06:06,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:06:06,037 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:06:06,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06 WrapperNode [2022-11-03 02:06:06,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:06:06,039 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:06:06,039 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:06:06,039 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:06:06,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,071 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,110 INFO L138 Inliner]: procedures = 126, calls = 36, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 117 [2022-11-03 02:06:06,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:06:06,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:06:06,112 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:06:06,112 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:06:06,122 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,144 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,157 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:06:06,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:06:06,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:06:06,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:06:06,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (1/1) ... [2022-11-03 02:06:06,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:06:06,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:06,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:06:06,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:06:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:06:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-03 02:06:06,247 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-03 02:06:06,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:06:06,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:06:06,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:06:06,435 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:06:06,437 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:06:06,930 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:06:06,984 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:06:06,985 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-03 02:06:06,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:06:06 BoogieIcfgContainer [2022-11-03 02:06:06,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:06:06,990 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:06:06,991 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:06:06,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:06:06,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:06:05" (1/3) ... [2022-11-03 02:06:06,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e858297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:06:06, skipping insertion in model container [2022-11-03 02:06:06,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:06:06" (2/3) ... [2022-11-03 02:06:06,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e858297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:06:06, skipping insertion in model container [2022-11-03 02:06:07,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:06:06" (3/3) ... [2022-11-03 02:06:07,002 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i [2022-11-03 02:06:07,023 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:06:07,024 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 42 error locations. [2022-11-03 02:06:07,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:06:07,101 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5e8303c1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:06:07,103 INFO L358 AbstractCegarLoop]: Starting to check reachability of 42 error locations. [2022-11-03 02:06:07,121 INFO L276 IsEmpty]: Start isEmpty. Operand has 83 states, 37 states have (on average 2.324324324324324) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:06:07,133 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:07,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:06:07,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:07,145 INFO L85 PathProgramCache]: Analyzing trace with hash 174313290, now seen corresponding path program 1 times [2022-11-03 02:06:07,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809108255] [2022-11-03 02:06:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:07,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:07,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809108255] [2022-11-03 02:06:07,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809108255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:07,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:07,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:06:07,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443518910] [2022-11-03 02:06:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:07,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:07,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:07,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:07,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:07,576 INFO L87 Difference]: Start difference. First operand has 83 states, 37 states have (on average 2.324324324324324) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:07,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:07,760 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2022-11-03 02:06:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:07,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:06:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:07,777 INFO L225 Difference]: With dead ends: 81 [2022-11-03 02:06:07,778 INFO L226 Difference]: Without dead ends: 79 [2022-11-03 02:06:07,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:07,786 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:07,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 107 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:07,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-03 02:06:07,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-11-03 02:06:07,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:07,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-11-03 02:06:07,846 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 5 [2022-11-03 02:06:07,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:07,847 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-11-03 02:06:07,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:07,848 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-11-03 02:06:07,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 02:06:07,849 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:07,849 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 02:06:07,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:06:07,850 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:07,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:07,850 INFO L85 PathProgramCache]: Analyzing trace with hash 174313291, now seen corresponding path program 1 times [2022-11-03 02:06:07,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:07,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062682246] [2022-11-03 02:06:07,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:07,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:07,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:07,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:07,988 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:07,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062682246] [2022-11-03 02:06:07,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062682246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:07,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:07,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:06:07,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019025083] [2022-11-03 02:06:07,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:07,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:07,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:07,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:07,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:07,992 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:08,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:08,098 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-11-03 02:06:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:08,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 02:06:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:08,100 INFO L225 Difference]: With dead ends: 77 [2022-11-03 02:06:08,100 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 02:06:08,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:08,102 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:08,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 112 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:08,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 02:06:08,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-03 02:06:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 36 states have (on average 2.138888888888889) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-03 02:06:08,111 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 5 [2022-11-03 02:06:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:08,112 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-03 02:06:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:06:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-03 02:06:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-03 02:06:08,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:08,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:08,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:06:08,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1147239271, now seen corresponding path program 1 times [2022-11-03 02:06:08,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:08,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491528665] [2022-11-03 02:06:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:08,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:08,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:08,193 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:08,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491528665] [2022-11-03 02:06:08,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491528665] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:08,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:08,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 02:06:08,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061787529] [2022-11-03 02:06:08,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:08,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 02:06:08,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:08,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 02:06:08,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:08,196 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:06:08,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:08,226 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2022-11-03 02:06:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 02:06:08,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-03 02:06:08,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:08,228 INFO L225 Difference]: With dead ends: 83 [2022-11-03 02:06:08,229 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:06:08,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 02:06:08,230 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:08,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 141 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:06:08,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:06:08,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-11-03 02:06:08,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 37 states have (on average 2.108108108108108) internal successors, (78), 74 states have internal predecessors, (78), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2022-11-03 02:06:08,241 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 10 [2022-11-03 02:06:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:08,242 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2022-11-03 02:06:08,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:06:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2022-11-03 02:06:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:06:08,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:08,243 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:08,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:06:08,244 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:08,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:08,245 INFO L85 PathProgramCache]: Analyzing trace with hash -667240067, now seen corresponding path program 1 times [2022-11-03 02:06:08,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:08,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242501574] [2022-11-03 02:06:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:08,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:08,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:06:08,507 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:08,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242501574] [2022-11-03 02:06:08,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242501574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:08,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:08,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:06:08,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127263876] [2022-11-03 02:06:08,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:06:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:08,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:06:08,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:06:08,513 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:08,754 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-11-03 02:06:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:06:08,755 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-03 02:06:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:08,761 INFO L225 Difference]: With dead ends: 129 [2022-11-03 02:06:08,762 INFO L226 Difference]: Without dead ends: 129 [2022-11-03 02:06:08,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:06:08,774 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 60 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:08,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 183 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:06:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-03 02:06:08,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 77. [2022-11-03 02:06:08,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 37 states have (on average 2.081081081081081) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-03 02:06:08,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 17 [2022-11-03 02:06:08,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:08,786 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-03 02:06:08,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-03 02:06:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-03 02:06:08,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:08,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:08,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:06:08,789 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:08,790 INFO L85 PathProgramCache]: Analyzing trace with hash -667240066, now seen corresponding path program 1 times [2022-11-03 02:06:08,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:08,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912985876] [2022-11-03 02:06:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:08,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:09,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:09,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:09,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912985876] [2022-11-03 02:06:09,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912985876] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:09,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:09,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:06:09,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145252744] [2022-11-03 02:06:09,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:09,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-03 02:06:09,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:09,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-03 02:06:09,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:06:09,108 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:09,356 INFO L93 Difference]: Finished difference Result 77 states and 82 transitions. [2022-11-03 02:06:09,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:06:09,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-11-03 02:06:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:09,360 INFO L225 Difference]: With dead ends: 77 [2022-11-03 02:06:09,360 INFO L226 Difference]: Without dead ends: 77 [2022-11-03 02:06:09,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:06:09,368 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:09,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 173 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:06:09,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-03 02:06:09,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-11-03 02:06:09,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 37 states have (on average 2.054054054054054) internal successors, (76), 72 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:09,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-11-03 02:06:09,390 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 17 [2022-11-03 02:06:09,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:09,391 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-11-03 02:06:09,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:09,391 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-11-03 02:06:09,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:06:09,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:09,393 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:09,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:06:09,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:09,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:09,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1267444548, now seen corresponding path program 1 times [2022-11-03 02:06:09,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:09,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342245929] [2022-11-03 02:06:09,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:09,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:09,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:09,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342245929] [2022-11-03 02:06:09,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342245929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:09,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237175900] [2022-11-03 02:06:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:09,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:09,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:09,794 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:09,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:06:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:09,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-03 02:06:09,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:10,037 INFO L390 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 [2022-11-03 02:06:10,185 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:06:10,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:06:10,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:10,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:10,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237175900] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:10,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1578552467] [2022-11-03 02:06:10,334 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:06:10,334 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:10,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:10,346 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:10,347 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:06:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:10,512 INFO L390 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 [2022-11-03 02:06:10,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:06:10,535 INFO L390 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 15 treesize of output 1 [2022-11-03 02:06:10,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:10,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:10,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:10,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:10,595 INFO L390 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 [2022-11-03 02:06:10,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:10,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:10,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:11,135 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:06:11,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-03 02:06:11,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-03 02:06:11,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-03 02:06:11,440 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:11,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:11,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:11,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,484 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,489 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,611 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:06:11,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-03 02:06:11,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:11,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:11,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 9 treesize of output 3 [2022-11-03 02:06:11,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:11,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2022-11-03 02:06:11,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:11,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:12,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:06:12,070 INFO L390 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 19 treesize of output 11 [2022-11-03 02:06:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:12,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:06:12,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:12,412 INFO L390 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 133 treesize of output 117 [2022-11-03 02:06:12,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:12,429 INFO L390 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-03 02:06:12,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:12,442 INFO L390 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 0 case distinctions, treesize of input 121 treesize of output 109 [2022-11-03 02:06:12,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:12,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:12,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:12,816 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-03 02:06:13,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:06:17,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1026#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:06:17,535 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:06:17,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:06:17,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2022-11-03 02:06:17,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329498961] [2022-11-03 02:06:17,536 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:17,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:06:17,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:17,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:06:17,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:06:17,538 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:06:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:17,898 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2022-11-03 02:06:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:06:17,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2022-11-03 02:06:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:17,899 INFO L225 Difference]: With dead ends: 126 [2022-11-03 02:06:17,900 INFO L226 Difference]: Without dead ends: 126 [2022-11-03 02:06:17,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-11-03 02:06:17,901 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 53 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:17,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 320 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 352 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-11-03 02:06:17,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-03 02:06:17,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2022-11-03 02:06:17,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 37 states have (on average 2.027027027027027) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:17,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2022-11-03 02:06:17,906 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 19 [2022-11-03 02:06:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:17,907 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2022-11-03 02:06:17,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-03 02:06:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2022-11-03 02:06:17,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-03 02:06:17,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:17,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:17,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:18,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-03 02:06:18,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:18,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1267444547, now seen corresponding path program 1 times [2022-11-03 02:06:18,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:18,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067600373] [2022-11-03 02:06:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:18,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:18,490 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:18,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067600373] [2022-11-03 02:06:18,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067600373] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:18,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472941788] [2022-11-03 02:06:18,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:18,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:18,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:18,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:18,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:06:18,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-03 02:06:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:18,632 INFO L390 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 [2022-11-03 02:06:18,644 INFO L390 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 [2022-11-03 02:06:18,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:18,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:06:18,891 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:18,891 INFO L390 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 11 treesize of output 11 [2022-11-03 02:06:18,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:06:18,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:23,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472941788] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:23,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547436009] [2022-11-03 02:06:23,153 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-03 02:06:23,153 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:23,154 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:23,154 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:23,154 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:23,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:06:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:23,227 INFO L390 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 [2022-11-03 02:06:23,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:06:23,248 INFO L390 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 15 treesize of output 1 [2022-11-03 02:06:23,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:23,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:23,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:23,277 INFO L390 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 [2022-11-03 02:06:23,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:23,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:23,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:23,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:23,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:23,540 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:06:23,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-03 02:06:23,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:23,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:23,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:23,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:23,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:23,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:23,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:23,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:23,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:23,935 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:06:23,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-03 02:06:24,148 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:24,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:24,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:24,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:24,196 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:24,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:24,212 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:24,213 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:24,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:24,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:24,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:06:24,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:06:24,301 INFO L390 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 19 treesize of output 11 [2022-11-03 02:06:24,517 INFO L390 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 [2022-11-03 02:06:24,527 INFO L390 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 [2022-11-03 02:06:24,538 INFO L390 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 15 treesize of output 1 [2022-11-03 02:06:24,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:24,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:24,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:24,845 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-03 02:06:25,092 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:06:29,599 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1332#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (< (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4)) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:06:29,599 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:06:29,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:06:29,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2022-11-03 02:06:29,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384409071] [2022-11-03 02:06:29,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:29,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:06:29,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:29,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:06:29,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:06:29,601 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:06:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:30,272 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2022-11-03 02:06:30,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-03 02:06:30,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2022-11-03 02:06:30,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:30,274 INFO L225 Difference]: With dead ends: 126 [2022-11-03 02:06:30,274 INFO L226 Difference]: Without dead ends: 126 [2022-11-03 02:06:30,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2022-11-03 02:06:30,275 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:30,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 265 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 564 Invalid, 0 Unknown, 88 Unchecked, 0.5s Time] [2022-11-03 02:06:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-03 02:06:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 74. [2022-11-03 02:06:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 37 states have (on average 2.0) internal successors, (74), 70 states have internal predecessors, (74), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2022-11-03 02:06:30,286 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 19 [2022-11-03 02:06:30,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:30,287 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2022-11-03 02:06:30,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:06:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2022-11-03 02:06:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:06:30,288 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:30,288 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:30,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:30,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:06:30,498 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:30,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1756629474, now seen corresponding path program 1 times [2022-11-03 02:06:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:30,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373312975] [2022-11-03 02:06:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-03 02:06:30,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373312975] [2022-11-03 02:06:30,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373312975] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:30,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268552740] [2022-11-03 02:06:30,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:30,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:30,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:30,891 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:30,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:06:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:31,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-03 02:06:31,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:31,018 INFO L390 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 [2022-11-03 02:06:31,038 INFO L390 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 5 treesize of output 3 [2022-11-03 02:06:31,122 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:06:31,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:06:31,157 INFO L390 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 5 treesize of output 3 [2022-11-03 02:06:31,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:06:31,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:31,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:31,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268552740] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:31,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627905658] [2022-11-03 02:06:31,312 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 02:06:31,312 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:31,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:31,312 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:31,312 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:31,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:06:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:31,382 INFO L390 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 [2022-11-03 02:06:31,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:06:31,394 INFO L390 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 15 treesize of output 1 [2022-11-03 02:06:31,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:31,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,415 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:31,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:31,428 INFO L390 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 [2022-11-03 02:06:31,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:31,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,480 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:31,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:31,693 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:06:31,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-03 02:06:31,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:31,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:31,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:31,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:31,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:31,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:31,984 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:31,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:31,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:31,990 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:32,059 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:06:32,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 197 [2022-11-03 02:06:32,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:32,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:32,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:32,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:32,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:32,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:32,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:32,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:32,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:06:32,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:32,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:06:32,410 INFO L390 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 19 treesize of output 11 [2022-11-03 02:06:32,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:06:32,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:32,656 INFO L390 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 133 treesize of output 117 [2022-11-03 02:06:32,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:32,668 INFO L390 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 0 case distinctions, treesize of input 129 treesize of output 117 [2022-11-03 02:06:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:06:32,682 INFO L390 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 0 case distinctions, treesize of input 125 treesize of output 113 [2022-11-03 02:06:32,725 INFO L390 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 [2022-11-03 02:06:32,736 INFO L390 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 [2022-11-03 02:06:32,753 INFO L390 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 15 treesize of output 1 [2022-11-03 02:06:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:33,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:33,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:33,044 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 65 for LOIs [2022-11-03 02:06:33,249 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:06:39,250 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1651#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_#res#1.offset|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_sll_circular_remove_first_~head#1.base| |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= |ULTIMATE.start_sll_circular_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (<= 0 |#NULL.offset|) (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (= |#NULL.base| 0))' at error location [2022-11-03 02:06:39,250 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:06:39,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:06:39,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2022-11-03 02:06:39,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252594634] [2022-11-03 02:06:39,251 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:39,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:06:39,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:39,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:06:39,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-11-03 02:06:39,253 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 16 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:06:39,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:39,825 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2022-11-03 02:06:39,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:06:39,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-03 02:06:39,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:39,827 INFO L225 Difference]: With dead ends: 119 [2022-11-03 02:06:39,827 INFO L226 Difference]: Without dead ends: 119 [2022-11-03 02:06:39,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:06:39,828 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:39,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 258 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 356 Invalid, 0 Unknown, 136 Unchecked, 0.4s Time] [2022-11-03 02:06:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-03 02:06:39,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2022-11-03 02:06:39,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 40 states have (on average 1.875) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:39,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-11-03 02:06:39,835 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 21 [2022-11-03 02:06:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:39,836 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-11-03 02:06:39,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:06:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-11-03 02:06:39,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:06:39,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:39,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:39,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:40,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:40,038 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:40,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1756629475, now seen corresponding path program 1 times [2022-11-03 02:06:40,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:40,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401446572] [2022-11-03 02:06:40,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:40,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:40,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:40,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401446572] [2022-11-03 02:06:40,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401446572] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:40,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300108757] [2022-11-03 02:06:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:40,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:06:40,510 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:06:40,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:06:40,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:40,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-03 02:06:40,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:06:40,652 INFO L390 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 [2022-11-03 02:06:40,678 INFO L390 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 5 treesize of output 3 [2022-11-03 02:06:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:40,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:06:40,801 INFO L390 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 5 treesize of output 3 [2022-11-03 02:06:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:40,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:06:40,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:06:40,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:06:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300108757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:06:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [482218372] [2022-11-03 02:06:41,075 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-11-03 02:06:41,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:06:41,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:06:41,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:06:41,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:06:41,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:06:41,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:41,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:06:41,144 INFO L390 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 [2022-11-03 02:06:41,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:41,156 INFO L390 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 15 treesize of output 1 [2022-11-03 02:06:41,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:06:41,171 INFO L390 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 [2022-11-03 02:06:41,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,178 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:41,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:06:41,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:41,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,244 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:41,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:06:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,335 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:41,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:41,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,435 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:41,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:41,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:06:41,595 INFO L390 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 19 treesize of output 11 [2022-11-03 02:06:41,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:06:41,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,701 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:41,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:41,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,829 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:41,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:41,864 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:41,900 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:41,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:06:41,976 INFO L390 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 19 treesize of output 11 [2022-11-03 02:06:41,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:41,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:06:42,075 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:06:42,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:06:42,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:06:42,125 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:06:42,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:06:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:42,233 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:42,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:42,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:42,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:42,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:42,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:42,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:42,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:42,335 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:42,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:42,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:42,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:42,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:42,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:06:42,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:06:42,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:42,478 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:06:42,479 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:06:42,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:42,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:06:42,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:06:42,523 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2022-11-03 02:06:42,841 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:06:52,664 WARN L234 SmtUtils]: Spent 7.45s on a formula simplification. DAG size of input: 131 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:06:55,309 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1962#(and (< |#StackHeapBarrier| |ULTIMATE.start_main_~#s~0#1.base|) (<= (+ |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_create_~last~0#1.base|)) (< |ULTIMATE.start_sll_circular_create_~new_head~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start_main_~i~0#1| 0) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= (select (select |#memory_int| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) 4) |ULTIMATE.start_sll_circular_create_~data#1|) (= (select |ULTIMATE.start_main_old_#valid#1| 1) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 2) 1) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) (< |ULTIMATE.start_sll_circular_create_~last~0#1.base| |#StackHeapBarrier|) (not (= |ULTIMATE.start_sll_circular_create_~last~0#1.base| 0)) (= (+ |ULTIMATE.start_sll_circular_create_~len#1| 1) |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_sll_circular_remove_first_~head#1.base| |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (= |ULTIMATE.start_sll_circular_create_#in~data#1| |ULTIMATE.start_sll_circular_create_~data#1|) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) |ULTIMATE.start_sll_circular_create_~last~0#1.offset|)) (= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (= (select |#valid| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) 1) (= (select |ULTIMATE.start_main_old_#valid#1| 0) 0) (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_sll_circular_create_#in~len#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_sll_circular_create_~head~0#1.base| |ULTIMATE.start_sll_circular_create_#res#1.base|) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) 0) (= (select |ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~#s~0#1.base|) 0) (= 8 (select |#length| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|)) (= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (not (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.base| 0)) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_circular_create_#res#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|)) (= (select |#valid| |ULTIMATE.start_sll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (not (<= (+ 4 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (select |#length| |ULTIMATE.start_sll_circular_remove_first_~head#1.base|))) (= |ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_circular_create_~new_head~0#1.base|) |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset|)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:06:55,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:06:55,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:06:55,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2022-11-03 02:06:55,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116682799] [2022-11-03 02:06:55,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:06:55,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:06:55,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:06:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-03 02:06:55,312 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 13 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:06:55,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:55,885 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-11-03 02:06:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:06:55,886 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 21 [2022-11-03 02:06:55,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:55,886 INFO L225 Difference]: With dead ends: 69 [2022-11-03 02:06:55,887 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 02:06:55,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 02:06:55,890 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 94 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:55,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 215 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 260 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2022-11-03 02:06:55,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 02:06:55,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 63. [2022-11-03 02:06:55,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.6) internal successors, (64), 59 states have internal predecessors, (64), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2022-11-03 02:06:55,895 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 21 [2022-11-03 02:06:55,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:55,895 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2022-11-03 02:06:55,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-03 02:06:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2022-11-03 02:06:55,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:06:55,897 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:55,897 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:55,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:06:56,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:06:56,118 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1379061143, now seen corresponding path program 1 times [2022-11-03 02:06:56,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:56,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520792752] [2022-11-03 02:06:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:06:56,322 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:56,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520792752] [2022-11-03 02:06:56,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520792752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:56,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:56,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:06:56,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866901177] [2022-11-03 02:06:56,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:56,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:06:56,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:56,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:06:56,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:06:56,324 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:56,702 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2022-11-03 02:06:56,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:06:56,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-03 02:06:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:56,707 INFO L225 Difference]: With dead ends: 97 [2022-11-03 02:06:56,707 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:06:56,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:06:56,708 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 128 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:56,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 223 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:06:56,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:06:56,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2022-11-03 02:06:56,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 60 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:56,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-03 02:06:56,713 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 22 [2022-11-03 02:06:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:56,713 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-03 02:06:56,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.0) internal successors, (16), 9 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:56,713 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-03 02:06:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-03 02:06:56,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:56,723 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:56,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:06:56,723 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:56,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1379061142, now seen corresponding path program 1 times [2022-11-03 02:06:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:56,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831037705] [2022-11-03 02:06:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:56,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:57,130 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:57,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831037705] [2022-11-03 02:06:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831037705] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:57,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:06:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709715234] [2022-11-03 02:06:57,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:06:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:57,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:06:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:06:57,132 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:57,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:57,523 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2022-11-03 02:06:57,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:06:57,524 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-11-03 02:06:57,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:57,525 INFO L225 Difference]: With dead ends: 91 [2022-11-03 02:06:57,525 INFO L226 Difference]: Without dead ends: 91 [2022-11-03 02:06:57,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-11-03 02:06:57,526 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 214 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:57,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 233 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:06:57,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-03 02:06:57,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 64. [2022-11-03 02:06:57,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 41 states have (on average 1.5853658536585367) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:57,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2022-11-03 02:06:57,530 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 22 [2022-11-03 02:06:57,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:57,530 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2022-11-03 02:06:57,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.25) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:57,531 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2022-11-03 02:06:57,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-03 02:06:57,531 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:57,531 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:57,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-03 02:06:57,532 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:57,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:57,532 INFO L85 PathProgramCache]: Analyzing trace with hash 202425014, now seen corresponding path program 1 times [2022-11-03 02:06:57,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:57,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014134559] [2022-11-03 02:06:57,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:57,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:57,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:57,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:06:57,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:57,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014134559] [2022-11-03 02:06:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014134559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:57,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441252428] [2022-11-03 02:06:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:57,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-03 02:06:57,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:57,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-03 02:06:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:57,642 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:57,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:57,679 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2022-11-03 02:06:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-03 02:06:57,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 23 [2022-11-03 02:06:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:57,681 INFO L225 Difference]: With dead ends: 96 [2022-11-03 02:06:57,681 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:06:57,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-03 02:06:57,682 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 86 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:57,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 107 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 02:06:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:06:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 63. [2022-11-03 02:06:57,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.575) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:57,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-11-03 02:06:57,687 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 23 [2022-11-03 02:06:57,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:57,687 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-11-03 02:06:57,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:57,687 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-11-03 02:06:57,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:06:57,688 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:57,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:57,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-03 02:06:57,689 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:57,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:57,690 INFO L85 PathProgramCache]: Analyzing trace with hash -876523653, now seen corresponding path program 1 times [2022-11-03 02:06:57,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:57,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378909010] [2022-11-03 02:06:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:57,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:06:57,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378909010] [2022-11-03 02:06:57,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378909010] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:57,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:57,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:06:57,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110553467] [2022-11-03 02:06:57,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:57,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:06:57,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:57,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:06:57,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:06:57,785 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:57,912 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2022-11-03 02:06:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 02:06:57,913 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-03 02:06:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:57,914 INFO L225 Difference]: With dead ends: 63 [2022-11-03 02:06:57,914 INFO L226 Difference]: Without dead ends: 63 [2022-11-03 02:06:57,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:06:57,915 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:57,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 95 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:06:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-11-03 02:06:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-11-03 02:06:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2022-11-03 02:06:57,918 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 26 [2022-11-03 02:06:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:57,919 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2022-11-03 02:06:57,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2022-11-03 02:06:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:06:57,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:57,920 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:57,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:06:57,920 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:57,921 INFO L85 PathProgramCache]: Analyzing trace with hash -876523652, now seen corresponding path program 1 times [2022-11-03 02:06:57,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:57,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253182234] [2022-11-03 02:06:57,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:57,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:58,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:58,396 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:58,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253182234] [2022-11-03 02:06:58,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253182234] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:58,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:58,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:06:58,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613480509] [2022-11-03 02:06:58,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:58,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:06:58,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:58,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:06:58,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:06:58,398 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:58,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:58,899 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-11-03 02:06:58,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:06:58,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-03 02:06:58,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:58,901 INFO L225 Difference]: With dead ends: 107 [2022-11-03 02:06:58,901 INFO L226 Difference]: Without dead ends: 107 [2022-11-03 02:06:58,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:06:58,902 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 243 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:58,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 274 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 02:06:58,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-03 02:06:58,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 70. [2022-11-03 02:06:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.489795918367347) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-03 02:06:58,906 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 26 [2022-11-03 02:06:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:58,907 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-03 02:06:58,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-03 02:06:58,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 02:06:58,908 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:58,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:58,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-03 02:06:58,908 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:58,909 INFO L85 PathProgramCache]: Analyzing trace with hash -876540258, now seen corresponding path program 1 times [2022-11-03 02:06:58,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:58,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478889640] [2022-11-03 02:06:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:58,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:59,155 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478889640] [2022-11-03 02:06:59,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478889640] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:59,156 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:59,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:06:59,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224482915] [2022-11-03 02:06:59,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:06:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:59,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:06:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:06:59,158 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:59,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:06:59,478 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-11-03 02:06:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:06:59,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-03 02:06:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:06:59,479 INFO L225 Difference]: With dead ends: 115 [2022-11-03 02:06:59,479 INFO L226 Difference]: Without dead ends: 115 [2022-11-03 02:06:59,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-11-03 02:06:59,480 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 239 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:06:59,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 274 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:06:59,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-03 02:06:59,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2022-11-03 02:06:59,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.5333333333333334) internal successors, (92), 77 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:06:59,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-03 02:06:59,484 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 26 [2022-11-03 02:06:59,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:06:59,484 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-03 02:06:59,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.75) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:06:59,485 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-03 02:06:59,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:06:59,485 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:06:59,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:06:59,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-03 02:06:59,486 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:06:59,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:06:59,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1402944135, now seen corresponding path program 1 times [2022-11-03 02:06:59,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:06:59,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453289074] [2022-11-03 02:06:59,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:06:59,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:06:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:06:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:06:59,677 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:06:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453289074] [2022-11-03 02:06:59,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453289074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:06:59,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:06:59,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:06:59,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551748834] [2022-11-03 02:06:59,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:06:59,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:06:59,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:06:59,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:06:59,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:06:59,680 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:00,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:00,007 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2022-11-03 02:07:00,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:07:00,007 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-03 02:07:00,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:00,008 INFO L225 Difference]: With dead ends: 100 [2022-11-03 02:07:00,008 INFO L226 Difference]: Without dead ends: 100 [2022-11-03 02:07:00,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:07:00,009 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 179 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:00,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 226 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:00,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-11-03 02:07:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2022-11-03 02:07:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 63 states have (on average 1.507936507936508) internal successors, (95), 80 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:07:00,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 99 transitions. [2022-11-03 02:07:00,013 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 99 transitions. Word has length 27 [2022-11-03 02:07:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:00,013 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 99 transitions. [2022-11-03 02:07:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 99 transitions. [2022-11-03 02:07:00,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-03 02:07:00,014 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:00,014 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:00,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:07:00,014 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:07:00,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:00,015 INFO L85 PathProgramCache]: Analyzing trace with hash -541595136, now seen corresponding path program 1 times [2022-11-03 02:07:00,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:00,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673811923] [2022-11-03 02:07:00,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:00,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:00,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:07:00,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:00,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673811923] [2022-11-03 02:07:00,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673811923] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:00,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:00,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-03 02:07:00,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023210206] [2022-11-03 02:07:00,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:00,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:07:00,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:00,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:07:00,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:07:00,110 INFO L87 Difference]: Start difference. First operand 84 states and 99 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:00,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:00,207 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-11-03 02:07:00,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:07:00,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-11-03 02:07:00,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:00,209 INFO L225 Difference]: With dead ends: 83 [2022-11-03 02:07:00,209 INFO L226 Difference]: Without dead ends: 83 [2022-11-03 02:07:00,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-03 02:07:00,210 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:00,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 107 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-03 02:07:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-03 02:07:00,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 79 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:07:00,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 97 transitions. [2022-11-03 02:07:00,213 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 97 transitions. Word has length 28 [2022-11-03 02:07:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:00,214 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 97 transitions. [2022-11-03 02:07:00,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:00,214 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 97 transitions. [2022-11-03 02:07:00,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:07:00,215 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:00,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:00,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-03 02:07:00,216 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:07:00,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:00,216 INFO L85 PathProgramCache]: Analyzing trace with hash 390420060, now seen corresponding path program 1 times [2022-11-03 02:07:00,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:00,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451352372] [2022-11-03 02:07:00,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:00,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:00,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:00,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:07:00,518 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451352372] [2022-11-03 02:07:00,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451352372] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:00,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45525482] [2022-11-03 02:07:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:00,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:00,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:00,520 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:00,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:07:00,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:00,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-03 02:07:00,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:00,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:00,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 02:07:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:07:00,795 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 02:07:00,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45525482] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:00,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:07:00,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 15 [2022-11-03 02:07:00,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446923068] [2022-11-03 02:07:00,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:00,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 02:07:00,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:00,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 02:07:00,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:07:00,797 INFO L87 Difference]: Start difference. First operand 83 states and 97 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:00,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:00,990 INFO L93 Difference]: Finished difference Result 82 states and 95 transitions. [2022-11-03 02:07:00,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-03 02:07:00,991 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2022-11-03 02:07:00,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:00,992 INFO L225 Difference]: With dead ends: 82 [2022-11-03 02:07:00,992 INFO L226 Difference]: Without dead ends: 82 [2022-11-03 02:07:00,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:07:00,993 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:00,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 69 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:07:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-03 02:07:00,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-03 02:07:00,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 63 states have (on average 1.4444444444444444) internal successors, (91), 78 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:07:00,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 95 transitions. [2022-11-03 02:07:00,998 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 95 transitions. Word has length 29 [2022-11-03 02:07:00,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:00,998 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 95 transitions. [2022-11-03 02:07:00,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 95 transitions. [2022-11-03 02:07:00,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:07:00,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:00,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:01,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:01,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-03 02:07:01,200 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:07:01,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:01,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1667029142, now seen corresponding path program 1 times [2022-11-03 02:07:01,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:01,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481090058] [2022-11-03 02:07:01,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:01,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:01,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:01,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481090058] [2022-11-03 02:07:01,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481090058] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:01,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657588930] [2022-11-03 02:07:01,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:01,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:01,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:01,848 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:01,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:07:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-03 02:07:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:02,066 INFO L390 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 [2022-11-03 02:07:02,169 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:02,169 INFO L390 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 11 treesize of output 11 [2022-11-03 02:07:02,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:02,314 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 02:07:02,315 INFO L390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 49 [2022-11-03 02:07:02,453 INFO L390 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 45 treesize of output 33 [2022-11-03 02:07:02,558 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-03 02:07:02,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2022-11-03 02:07:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:02,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:02,608 INFO L390 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 32 treesize of output 24 [2022-11-03 02:07:02,620 INFO L356 Elim1Store]: treesize reduction 5, result has 77.3 percent of original size [2022-11-03 02:07:02,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-11-03 02:07:02,634 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_930 (Array Int Int)) (|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_930))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse0)) (= (select (select .cse1 .cse0) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|))))) is different from false [2022-11-03 02:07:02,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:02,653 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-11-03 02:07:02,714 INFO L356 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-11-03 02:07:02,714 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 115 treesize of output 131 [2022-11-03 02:07:02,731 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:02,731 INFO L390 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 104 treesize of output 100 [2022-11-03 02:07:03,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657588930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:03,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901258080] [2022-11-03 02:07:03,020 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:07:03,020 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:07:03,021 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:07:03,021 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:07:03,021 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:07:03,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:07:03,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:03,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:07:03,116 INFO L390 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 [2022-11-03 02:07:03,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:03,130 INFO L390 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 15 treesize of output 1 [2022-11-03 02:07:03,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:03,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:07:03,178 INFO L390 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 [2022-11-03 02:07:03,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:07:03,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:07:03,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:07:03,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,368 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:03,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:03,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,508 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:03,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:03,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,647 INFO L390 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 19 treesize of output 11 [2022-11-03 02:07:03,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:07:03,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:03,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,745 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:03,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:03,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,792 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:03,860 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:03,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:03,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:03,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:03,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:04,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:04,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:04,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 234 [2022-11-03 02:07:04,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:04,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 236 [2022-11-03 02:07:04,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:04,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 244 [2022-11-03 02:07:04,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:04,232 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:04,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:04,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:04,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:04,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:04,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:04,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:04,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:04,346 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:04,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:04,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:04,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:04,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:04,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:04,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:04,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:04,549 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:04,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:04,640 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:07:04,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:07:04,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:04,693 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:07:04,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:07:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:05,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:05,224 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2022-11-03 02:07:05,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:07:15,648 WARN L234 SmtUtils]: Spent 7.73s on a formula simplification. DAG size of input: 131 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:23,222 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4013#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~last~1#1.base|) 1)) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:07:23,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:07:23,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:07:23,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2022-11-03 02:07:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926161926] [2022-11-03 02:07:23,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:23,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-03 02:07:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-03 02:07:23,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2141, Unknown=1, NotChecked=94, Total=2450 [2022-11-03 02:07:23,227 INFO L87 Difference]: Start difference. First operand 82 states and 95 transitions. Second operand has 26 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:07:24,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:24,180 INFO L93 Difference]: Finished difference Result 154 states and 176 transitions. [2022-11-03 02:07:24,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:07:24,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-11-03 02:07:24,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:24,182 INFO L225 Difference]: With dead ends: 154 [2022-11-03 02:07:24,182 INFO L226 Difference]: Without dead ends: 154 [2022-11-03 02:07:24,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=283, Invalid=2800, Unknown=1, NotChecked=108, Total=3192 [2022-11-03 02:07:24,183 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 108 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:24,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 720 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 829 Invalid, 0 Unknown, 82 Unchecked, 0.6s Time] [2022-11-03 02:07:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-03 02:07:24,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 97. [2022-11-03 02:07:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 92 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:07:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-03 02:07:24,187 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 30 [2022-11-03 02:07:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:24,188 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-03 02:07:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 2.090909090909091) internal successors, (46), 21 states have internal predecessors, (46), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:07:24,188 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-03 02:07:24,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:07:24,188 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:24,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:24,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:24,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:24,389 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:07:24,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1667029143, now seen corresponding path program 1 times [2022-11-03 02:07:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140603411] [2022-11-03 02:07:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:24,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:25,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140603411] [2022-11-03 02:07:25,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140603411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:25,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828184085] [2022-11-03 02:07:25,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:25,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:25,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:25,572 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:25,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 02:07:25,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:25,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-03 02:07:25,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:25,746 INFO L390 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 [2022-11-03 02:07:25,970 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:25,971 INFO L390 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 11 treesize of output 11 [2022-11-03 02:07:26,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:26,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:26,179 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 02:07:26,179 INFO L390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 61 [2022-11-03 02:07:26,194 INFO L390 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 34 treesize of output 36 [2022-11-03 02:07:26,503 INFO L356 Elim1Store]: treesize reduction 3, result has 81.3 percent of original size [2022-11-03 02:07:26,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 51 [2022-11-03 02:07:26,512 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-03 02:07:26,512 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2022-11-03 02:07:26,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:26,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:26,847 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:26,848 INFO L390 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 80 treesize of output 84 [2022-11-03 02:07:26,929 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1020 (Array Int Int))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1020) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1021))) (let ((.cse2 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (< (select (select .cse0 .cse1) .cse2) 1) (not (= .cse2 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1020 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1020))) (let ((.cse3 (select (select .cse4 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse3)) (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse5 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1021) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select .cse4 .cse3) .cse5)) (not (= .cse5 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|))))))))) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1020 (Array Int Int))) (let ((.cse6 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1020) |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse6)) (forall ((v_ArrVal_1021 (Array Int Int))) (let ((.cse7 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1021))) (let ((.cse8 (select (select .cse7 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= 0 (select (select .cse7 .cse6) .cse8)) (not (= .cse8 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)))))))))) is different from false [2022-11-03 02:07:27,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,008 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2022-11-03 02:07:27,016 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,016 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2022-11-03 02:07:27,090 INFO L356 Elim1Store]: treesize reduction 61, result has 45.0 percent of original size [2022-11-03 02:07:27,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 172 treesize of output 175 [2022-11-03 02:07:27,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 208 [2022-11-03 02:07:27,140 INFO L390 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 156 treesize of output 144 [2022-11-03 02:07:27,169 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 173 [2022-11-03 02:07:27,916 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,916 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 52 [2022-11-03 02:07:27,927 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,927 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2022-11-03 02:07:27,957 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:27,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 130 [2022-11-03 02:07:28,152 INFO L356 Elim1Store]: treesize reduction 140, result has 43.8 percent of original size [2022-11-03 02:07:28,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 234 treesize of output 284 [2022-11-03 02:07:28,205 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:28,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 206 [2022-11-03 02:07:28,229 INFO L390 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 90 treesize of output 74 [2022-11-03 02:07:29,930 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:29,930 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 60 [2022-11-03 02:07:29,940 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:29,941 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 44 [2022-11-03 02:07:29,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:30,013 INFO L356 Elim1Store]: treesize reduction 72, result has 35.1 percent of original size [2022-11-03 02:07:30,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 108 treesize of output 104 [2022-11-03 02:07:30,072 INFO L356 Elim1Store]: treesize reduction 4, result has 88.6 percent of original size [2022-11-03 02:07:30,073 INFO L390 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 85 treesize of output 97 [2022-11-03 02:07:30,083 INFO L390 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 49 treesize of output 45 [2022-11-03 02:07:30,094 INFO L390 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 60 treesize of output 52 [2022-11-03 02:07:30,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828184085] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:30,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [371394530] [2022-11-03 02:07:30,487 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 02:07:30,487 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:07:30,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:07:30,488 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:07:30,488 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:07:30,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:07:30,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:30,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:07:30,561 INFO L390 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 [2022-11-03 02:07:30,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:30,576 INFO L390 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 15 treesize of output 1 [2022-11-03 02:07:30,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:30,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:07:30,598 INFO L390 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 [2022-11-03 02:07:30,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:07:30,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,635 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:07:30,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:30,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:07:30,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,758 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:30,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:30,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:30,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:30,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:30,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:30,837 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:30,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:30,868 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:30,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:30,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:30,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:30,928 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:30,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:30,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:07:31,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:31,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:31,034 INFO L390 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 19 treesize of output 11 [2022-11-03 02:07:31,174 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:07:31,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-03 02:07:31,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:31,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:31,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,434 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,440 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,555 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:07:31,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-03 02:07:31,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:31,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:31,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:31,763 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,768 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:31,822 INFO L390 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 19 treesize of output 11 [2022-11-03 02:07:31,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:31,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:31,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:07:31,986 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:07:31,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-03 02:07:32,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:32,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:32,200 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:32,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:32,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:32,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,241 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,242 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,244 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,344 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:07:32,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-03 02:07:32,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:32,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:32,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:32,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:32,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:32,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,552 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,555 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 02:07:32,692 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:07:32,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 233 treesize of output 222 [2022-11-03 02:07:32,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:32,875 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:07:32,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:07:32,926 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:07:32,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:07:33,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:33,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:33,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:33,392 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 85 for LOIs [2022-11-03 02:07:33,662 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:07:43,665 WARN L234 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 131 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:07:51,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4477#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (or (not (<= (+ |ULTIMATE.start_sll_circular_remove_first_~last~1#1.offset| 4) (select |#length| |ULTIMATE.start_sll_circular_remove_first_~last~1#1.base|))) (not (<= 0 |ULTIMATE.start_sll_circular_remove_first_~last~1#1.offset|))) (= |#NULL.base| 0))' at error location [2022-11-03 02:07:51,590 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:07:51,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 02:07:51,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 32 [2022-11-03 02:07:51,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725361264] [2022-11-03 02:07:51,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 02:07:51,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:07:51,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:51,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:07:51,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3522, Unknown=1, NotChecked=120, Total=3906 [2022-11-03 02:07:51,594 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 33 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:07:53,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:53,581 INFO L93 Difference]: Finished difference Result 168 states and 191 transitions. [2022-11-03 02:07:53,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:07:53,582 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2022-11-03 02:07:53,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:53,583 INFO L225 Difference]: With dead ends: 168 [2022-11-03 02:07:53,583 INFO L226 Difference]: Without dead ends: 168 [2022-11-03 02:07:53,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=376, Invalid=5029, Unknown=1, NotChecked=144, Total=5550 [2022-11-03 02:07:53,586 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 155 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1386 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:53,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1386 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1267 Invalid, 0 Unknown, 75 Unchecked, 0.9s Time] [2022-11-03 02:07:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-03 02:07:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 97. [2022-11-03 02:07:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.4025974025974026) internal successors, (108), 92 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:07:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2022-11-03 02:07:53,591 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 30 [2022-11-03 02:07:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:53,592 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2022-11-03 02:07:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 02:07:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2022-11-03 02:07:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 02:07:53,593 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:53,593 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:53,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-03 02:07:53,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:53,802 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:07:53,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:53,803 INFO L85 PathProgramCache]: Analyzing trace with hash 138181247, now seen corresponding path program 1 times [2022-11-03 02:07:53,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:53,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875388265] [2022-11-03 02:07:53,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:53,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:54,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:07:54,181 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:54,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875388265] [2022-11-03 02:07:54,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875388265] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:07:54,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:07:54,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-03 02:07:54,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121148855] [2022-11-03 02:07:54,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:07:54,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 02:07:54,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:07:54,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 02:07:54,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-03 02:07:54,182 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:54,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:07:54,491 INFO L93 Difference]: Finished difference Result 106 states and 121 transitions. [2022-11-03 02:07:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 02:07:54,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-11-03 02:07:54,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:07:54,493 INFO L225 Difference]: With dead ends: 106 [2022-11-03 02:07:54,493 INFO L226 Difference]: Without dead ends: 106 [2022-11-03 02:07:54,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:07:54,494 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 38 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:07:54,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 222 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:07:54,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-03 02:07:54,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-11-03 02:07:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.3658536585365855) internal successors, (112), 97 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:07:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2022-11-03 02:07:54,501 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 31 [2022-11-03 02:07:54,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:07:54,501 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2022-11-03 02:07:54,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 02:07:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2022-11-03 02:07:54,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:07:54,502 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:07:54,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:07:54,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-03 02:07:54,503 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:07:54,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:07:54,504 INFO L85 PathProgramCache]: Analyzing trace with hash 232644114, now seen corresponding path program 1 times [2022-11-03 02:07:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:07:54,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827212251] [2022-11-03 02:07:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:07:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 02:07:54,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:07:54,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827212251] [2022-11-03 02:07:54,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827212251] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:07:54,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004751330] [2022-11-03 02:07:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:07:54,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:07:54,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:07:54,630 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:07:54,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-03 02:07:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:07:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-03 02:07:54,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:07:54,837 INFO L390 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 [2022-11-03 02:07:54,972 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:54,973 INFO L390 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 11 treesize of output 11 [2022-11-03 02:07:55,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:55,089 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 02:07:55,090 INFO L390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2022-11-03 02:07:55,157 INFO L390 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 [2022-11-03 02:07:55,257 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-11-03 02:07:55,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 23 [2022-11-03 02:07:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:07:55,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:07:55,406 INFO L390 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 38 treesize of output 30 [2022-11-03 02:07:55,415 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1171 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1171))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse1)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1)))))) is different from false [2022-11-03 02:07:55,431 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:55,432 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 45 [2022-11-03 02:07:55,487 INFO L356 Elim1Store]: treesize reduction 21, result has 67.2 percent of original size [2022-11-03 02:07:55,488 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 121 treesize of output 129 [2022-11-03 02:07:55,502 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:07:55,503 INFO L390 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 102 treesize of output 92 [2022-11-03 02:07:56,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-03 02:07:56,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004751330] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 02:07:56,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1075532646] [2022-11-03 02:07:56,015 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:07:56,016 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:07:56,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:07:56,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:07:56,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:07:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 02:07:56,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:56,077 INFO L390 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 [2022-11-03 02:07:56,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 02:07:56,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:56,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:07:56,100 INFO L390 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 15 treesize of output 1 [2022-11-03 02:07:56,108 INFO L390 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 [2022-11-03 02:07:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:07:56,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 02:07:56,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:07:56,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:07:56,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-03 02:07:56,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,272 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:56,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:56,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,373 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:56,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:56,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,427 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:07:56,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,508 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:56,523 INFO L390 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 19 treesize of output 11 [2022-11-03 02:07:56,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,618 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:56,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:56,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,715 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:07:56,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:07:56,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:07:56,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:07:56,845 INFO L390 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 19 treesize of output 11 [2022-11-03 02:07:56,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:56,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:56,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-11-03 02:07:56,947 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:07:56,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:07:56,977 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:07:56,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-11-03 02:07:56,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:57,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:57,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:57,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 21 [2022-11-03 02:07:57,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,261 INFO L356 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-03 02:07:57,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 101 treesize of output 81 [2022-11-03 02:07:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,288 INFO L356 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-11-03 02:07:57,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 64 [2022-11-03 02:07:57,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:07:57,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-11-03 02:07:57,790 INFO L356 Elim1Store]: treesize reduction 290, result has 10.2 percent of original size [2022-11-03 02:07:57,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 613 treesize of output 618 [2022-11-03 02:07:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,877 INFO L356 Elim1Store]: treesize reduction 275, result has 8.3 percent of original size [2022-11-03 02:07:59,878 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 2746 treesize of output 2341 [2022-11-03 02:07:59,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:07:59,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:00,080 INFO L356 Elim1Store]: treesize reduction 249, result has 5.7 percent of original size [2022-11-03 02:08:00,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 2449 treesize of output 2082 [2022-11-03 02:08:00,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:00,151 INFO L390 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 2133 treesize of output 2085 [2022-11-03 02:08:03,833 INFO L356 Elim1Store]: treesize reduction 294, result has 9.0 percent of original size [2022-11-03 02:08:03,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 613 treesize of output 614 [2022-11-03 02:08:04,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,670 INFO L356 Elim1Store]: treesize reduction 275, result has 8.3 percent of original size [2022-11-03 02:08:04,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 1123 treesize of output 970 [2022-11-03 02:08:04,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:08:04,822 INFO L356 Elim1Store]: treesize reduction 246, result has 6.8 percent of original size [2022-11-03 02:08:04,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 1003 treesize of output 867 [2022-11-03 02:08:04,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:04,863 INFO L390 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 895 treesize of output 871 [2022-11-03 02:08:05,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:05,847 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:08:05,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:08:05,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:08:05,884 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:08:05,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:08:05,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:08:05,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:08:05,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:05,943 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:08:05,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:08:05,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:08:05,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:08:05,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:08:06,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2022-11-03 02:08:06,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:08:06,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:06,107 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 02:08:06,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-11-03 02:08:06,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:06,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 33 [2022-11-03 02:08:06,139 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 89 for LOIs [2022-11-03 02:08:06,388 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:08:16,102 WARN L234 SmtUtils]: Spent 7.49s on a formula simplification. DAG size of input: 135 DAG size of output: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:08:27,701 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5232#(and (<= 2 |ULTIMATE.start_sll_circular_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_circular_create_#in~data#1| 1) (<= 1 |ULTIMATE.start_sll_circular_create_~len#1|) (= |ULTIMATE.start_sll_circular_create_~last~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_#res#1.offset| 0) (<= |ULTIMATE.start_main_~i~0#1| 2) (not (= (select |#valid| |ULTIMATE.start_sll_circular_remove_first_~head#1.base|) 1)) (<= |ULTIMATE.start_sll_circular_create_#in~len#1| 2) (<= 1 |ULTIMATE.start_sll_circular_create_~data#1|) (<= 0 |ULTIMATE.start_sll_circular_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_circular_remove_first_#in~head#1.offset| 0) (<= 1 |ULTIMATE.start_sll_circular_create_#in~data#1|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_sll_circular_create_~len#1| 1) (<= 0 |ULTIMATE.start_sll_circular_remove_first_#in~head#1.base|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_circular_create_~data#1| 1) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= |ULTIMATE.start_sll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_circular_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_circular_create_#res#1.offset|) (= |ULTIMATE.start_sll_circular_create_~new_head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:08:27,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:08:27,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 02:08:27,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 18, 17] total 33 [2022-11-03 02:08:27,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072532785] [2022-11-03 02:08:27,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 02:08:27,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-03 02:08:27,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:08:27,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-03 02:08:27,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2562, Unknown=1, NotChecked=102, Total=2862 [2022-11-03 02:08:27,704 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 33 states, 29 states have (on average 2.310344827586207) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:08:28,008 WARN L833 $PredicateComparison]: unable to prove that (and (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|)) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (= |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int) (v_ArrVal_1171 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1171))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= (select (select .cse0 .cse1) |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|) .cse1)) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse1))))))) is different from false [2022-11-03 02:08:28,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:08:28,516 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2022-11-03 02:08:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:08:28,516 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 29 states have (on average 2.310344827586207) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2022-11-03 02:08:28,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:08:28,517 INFO L225 Difference]: With dead ends: 105 [2022-11-03 02:08:28,517 INFO L226 Difference]: Without dead ends: 105 [2022-11-03 02:08:28,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=283, Invalid=3505, Unknown=2, NotChecked=242, Total=4032 [2022-11-03 02:08:28,519 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 96 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:08:28,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 491 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 757 Invalid, 0 Unknown, 133 Unchecked, 0.5s Time] [2022-11-03 02:08:28,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-03 02:08:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-03 02:08:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.302325581395349) internal successors, (112), 99 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:08:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-11-03 02:08:28,524 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 32 [2022-11-03 02:08:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:08:28,524 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-11-03 02:08:28,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 29 states have (on average 2.310344827586207) internal successors, (67), 27 states have internal predecessors, (67), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 02:08:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-11-03 02:08:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 02:08:28,526 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:08:28,526 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:08:28,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-03 02:08:28,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-03 02:08:28,738 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 39 more)] === [2022-11-03 02:08:28,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:08:28,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1099455537, now seen corresponding path program 2 times [2022-11-03 02:08:28,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:08:28,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125284626] [2022-11-03 02:08:28,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:08:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:08:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:08:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:29,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:08:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125284626] [2022-11-03 02:08:29,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125284626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:08:29,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665548455] [2022-11-03 02:08:29,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:08:29,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:08:29,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:08:29,714 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:08:29,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f35e36c-b57f-4baf-b1e0-9fe2b2918186/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-03 02:08:30,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:08:30,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:08:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 94 conjunts are in the unsatisfiable core [2022-11-03 02:08:30,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:08:30,171 INFO L390 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 [2022-11-03 02:08:30,467 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:08:30,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:08:30,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:08:30,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:08:30,753 INFO L356 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-11-03 02:08:30,754 INFO L390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 45 [2022-11-03 02:08:30,767 INFO L390 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 26 treesize of output 28 [2022-11-03 02:08:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:31,217 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-03 02:08:31,218 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2022-11-03 02:08:31,354 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 02:08:31,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 31 [2022-11-03 02:08:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 02:08:31,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 02:08:33,484 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~#s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_sll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_sll_circular_create_~head~0#1.base|)))) (let ((.cse2 (select (select .cse1 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_1266 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_circular_create_~last~0#1.base| v_ArrVal_1266))) (let ((.cse0 (select (select .cse3 |ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (= .cse0 |c_ULTIMATE.start_sll_circular_create_~head~0#1.offset|)) (= (select |c_#valid| (select (select .cse1 (select (select .cse1 .cse2) .cse0)) (select (select .cse3 .cse2) .cse0))) 1))))) (not (= |c_ULTIMATE.start_sll_circular_create_~head~0#1.base| .cse2)))))) is different from false [2022-11-03 02:08:33,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:08:34,797 INFO L356 Elim1Store]: treesize reduction 1806, result has 40.5 percent of original size [2022-11-03 02:08:34,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 18 new quantified variables, introduced 78 case distinctions, treesize of input 6632 treesize of output 6596 [2022-11-03 02:08:35,122 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:08:35,122 INFO L390 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 6452 treesize of output 5204 [2022-11-03 02:08:35,571 INFO L356 Elim1Store]: treesize reduction 149, result has 51.3 percent of original size [2022-11-03 02:08:35,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 8871 treesize of output 7511 [2022-11-03 02:08:36,328 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 02:08:36,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 7313 treesize of output 6879