./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/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_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 --- 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 02:26:08,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 02:26:08,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 02:26:08,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 02:26:08,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 02:26:08,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 02:26:08,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 02:26:08,094 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 02:26:08,096 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 02:26:08,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 02:26:08,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 02:26:08,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 02:26:08,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 02:26:08,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 02:26:08,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 02:26:08,114 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 02:26:08,116 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 02:26:08,117 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 02:26:08,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 02:26:08,127 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 02:26:08,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 02:26:08,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 02:26:08,133 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 02:26:08,134 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 02:26:08,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 02:26:08,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 02:26:08,145 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 02:26:08,147 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 02:26:08,147 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 02:26:08,149 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 02:26:08,149 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 02:26:08,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 02:26:08,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 02:26:08,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 02:26:08,157 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 02:26:08,157 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 02:26:08,158 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 02:26:08,158 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 02:26:08,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 02:26:08,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 02:26:08,160 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 02:26:08,161 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 02:26:08,200 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 02:26:08,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 02:26:08,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 02:26:08,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 02:26:08,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 02:26:08,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 02:26:08,202 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 02:26:08,203 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 02:26:08,203 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 02:26:08,203 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 02:26:08,204 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 02:26:08,204 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 02:26:08,204 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 02:26:08,205 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 02:26:08,205 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 02:26:08,205 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 02:26:08,205 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 02:26:08,205 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 02:26:08,206 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 02:26:08,206 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 02:26:08,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 02:26:08,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 02:26:08,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 02:26:08,209 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 02:26:08,209 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 02:26:08,209 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 02:26:08,209 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 02:26:08,209 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 02:26:08,210 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 02:26:08,210 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 02:26:08,210 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 02:26:08,210 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 02:26:08,211 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:08,211 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 02:26:08,211 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 02:26:08,211 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 02:26:08,211 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 02:26:08,212 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 02:26:08,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 02:26:08,212 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 02:26:08,212 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 02:26:08,212 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_ea706e77-e398-4d43-aa26-9943bc26918f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3b13662719be51a1d3330a7f40f7706daa8c7b2d4044bc92f854095c09c7c129 [2022-11-03 02:26:08,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 02:26:08,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 02:26:08,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 02:26:08,583 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 02:26:08,583 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 02:26:08,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2022-11-03 02:26:08,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/data/f2cb3fb79/433eafc6ea1a4b5494d0e91ce7b2c307/FLAG1aec52330 [2022-11-03 02:26:09,319 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 02:26:09,320 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i [2022-11-03 02:26:09,337 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/data/f2cb3fb79/433eafc6ea1a4b5494d0e91ce7b2c307/FLAG1aec52330 [2022-11-03 02:26:09,548 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/data/f2cb3fb79/433eafc6ea1a4b5494d0e91ce7b2c307 [2022-11-03 02:26:09,554 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 02:26:09,556 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 02:26:09,562 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:09,562 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 02:26:09,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 02:26:09,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:09" (1/1) ... [2022-11-03 02:26:09,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284a2926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:09, skipping insertion in model container [2022-11-03 02:26:09,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 02:26:09" (1/1) ... [2022-11-03 02:26:09,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 02:26:09,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 02:26:10,180 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_ea706e77-e398-4d43-aa26-9943bc26918f/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i[33822,33835] [2022-11-03 02:26:10,250 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:10,262 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 02:26:10,318 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_ea706e77-e398-4d43-aa26-9943bc26918f/sv-benchmarks/c/heap-manipulation/bubble_sort_linux-2.i[33822,33835] [2022-11-03 02:26:10,346 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 02:26:10,401 INFO L208 MainTranslator]: Completed translation [2022-11-03 02:26:10,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10 WrapperNode [2022-11-03 02:26:10,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 02:26:10,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:10,403 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 02:26:10,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 02:26:10,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,428 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,449 INFO L138 Inliner]: procedures = 232, calls = 75, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 116 [2022-11-03 02:26:10,449 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 02:26:10,450 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 02:26:10,450 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 02:26:10,450 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 02:26:10,459 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,488 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,493 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 02:26:10,494 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 02:26:10,494 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 02:26:10,494 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 02:26:10,495 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (1/1) ... [2022-11-03 02:26:10,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 02:26:10,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:10,548 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 02:26:10,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 02:26:10,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 02:26:10,600 INFO L130 BoogieDeclarations]: Found specification of procedure inspect [2022-11-03 02:26:10,600 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect [2022-11-03 02:26:10,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 02:26:10,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 02:26:10,601 INFO L130 BoogieDeclarations]: Found specification of procedure val_from_node [2022-11-03 02:26:10,601 INFO L138 BoogieDeclarations]: Found implementation of procedure val_from_node [2022-11-03 02:26:10,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 02:26:10,601 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-03 02:26:10,602 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-03 02:26:10,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 02:26:10,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 02:26:10,602 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 02:26:10,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 02:26:10,603 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-11-03 02:26:10,603 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-11-03 02:26:10,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 02:26:10,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 02:26:10,604 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 02:26:10,799 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 02:26:10,801 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 02:26:11,257 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 02:26:11,387 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 02:26:11,393 INFO L300 CfgBuilder]: Removed 41 assume(true) statements. [2022-11-03 02:26:11,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:11 BoogieIcfgContainer [2022-11-03 02:26:11,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 02:26:11,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 02:26:11,401 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 02:26:11,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 02:26:11,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 02:26:09" (1/3) ... [2022-11-03 02:26:11,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327a63fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:26:11, skipping insertion in model container [2022-11-03 02:26:11,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 02:26:10" (2/3) ... [2022-11-03 02:26:11,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@327a63fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 02:26:11, skipping insertion in model container [2022-11-03 02:26:11,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:11" (3/3) ... [2022-11-03 02:26:11,410 INFO L112 eAbstractionObserver]: Analyzing ICFG bubble_sort_linux-2.i [2022-11-03 02:26:11,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 02:26:11,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 02:26:11,519 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 02:26:11,527 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b78ed2f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 02:26:11,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 02:26:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 95 states have internal predecessors, (140), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-03 02:26:11,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-03 02:26:11,541 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:11,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:11,542 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:11,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:11,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1563842699, now seen corresponding path program 1 times [2022-11-03 02:26:11,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:11,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238559293] [2022-11-03 02:26:11,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:11,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:11,747 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 02:26:11,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:11,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238559293] [2022-11-03 02:26:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238559293] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:11,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 02:26:11,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856343397] [2022-11-03 02:26:11,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:11,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 02:26:11,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 02:26:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:26:11,803 INFO L87 Difference]: Start difference. First operand has 105 states, 76 states have (on average 1.8421052631578947) internal successors, (140), 95 states have internal predecessors, (140), 23 states have call successors, (23), 4 states have call predecessors, (23), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:26:11,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:11,935 INFO L93 Difference]: Finished difference Result 206 states and 369 transitions. [2022-11-03 02:26:11,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 02:26:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-03 02:26:11,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:11,953 INFO L225 Difference]: With dead ends: 206 [2022-11-03 02:26:11,953 INFO L226 Difference]: Without dead ends: 97 [2022-11-03 02:26:11,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 02:26:11,963 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:11,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 02:26:11,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-03 02:26:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-03 02:26:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 87 states have internal predecessors, (92), 21 states have call successors, (21), 4 states have call predecessors, (21), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 02:26:12,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2022-11-03 02:26:12,024 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 8 [2022-11-03 02:26:12,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:12,025 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2022-11-03 02:26:12,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 02:26:12,025 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2022-11-03 02:26:12,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 02:26:12,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:12,027 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:12,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 02:26:12,028 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 896972321, now seen corresponding path program 1 times [2022-11-03 02:26:12,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:12,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653440798] [2022-11-03 02:26:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:12,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:12,366 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 02:26:12,366 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:12,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653440798] [2022-11-03 02:26:12,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653440798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:12,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:12,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-03 02:26:12,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465862485] [2022-11-03 02:26:12,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-03 02:26:12,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:12,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-03 02:26:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-03 02:26:12,377 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:12,605 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2022-11-03 02:26:12,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-03 02:26:12,606 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-03 02:26:12,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:12,608 INFO L225 Difference]: With dead ends: 99 [2022-11-03 02:26:12,608 INFO L226 Difference]: Without dead ends: 96 [2022-11-03 02:26:12,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-03 02:26:12,610 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 166 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:12,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 205 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 02:26:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-03 02:26:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-03 02:26:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 86 states have internal predecessors, (91), 20 states have call successors, (20), 4 states have call predecessors, (20), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-03 02:26:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 116 transitions. [2022-11-03 02:26:12,668 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 116 transitions. Word has length 15 [2022-11-03 02:26:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:12,670 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 116 transitions. [2022-11-03 02:26:12,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 116 transitions. [2022-11-03 02:26:12,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 02:26:12,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:12,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:12,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 02:26:12,672 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:12,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1865049645, now seen corresponding path program 1 times [2022-11-03 02:26:12,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:12,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549862525] [2022-11-03 02:26:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:12,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:13,756 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 02:26:13,757 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:13,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549862525] [2022-11-03 02:26:13,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549862525] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:13,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:13,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:26:13,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414645107] [2022-11-03 02:26:13,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:13,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-03 02:26:13,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:13,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-03 02:26:13,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-11-03 02:26:13,763 INFO L87 Difference]: Start difference. First operand 96 states and 116 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:14,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:14,475 INFO L93 Difference]: Finished difference Result 181 states and 217 transitions. [2022-11-03 02:26:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 02:26:14,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-03 02:26:14,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:14,482 INFO L225 Difference]: With dead ends: 181 [2022-11-03 02:26:14,482 INFO L226 Difference]: Without dead ends: 175 [2022-11-03 02:26:14,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-11-03 02:26:14,492 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 377 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 469 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-03 02:26:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-03 02:26:14,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 159. [2022-11-03 02:26:14,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 131 states have (on average 1.2671755725190839) internal successors, (166), 145 states have internal predecessors, (166), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-03 02:26:14,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 196 transitions. [2022-11-03 02:26:14,518 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 196 transitions. Word has length 18 [2022-11-03 02:26:14,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:14,519 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 196 transitions. [2022-11-03 02:26:14,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:14,519 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 196 transitions. [2022-11-03 02:26:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 02:26:14,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:14,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:14,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 02:26:14,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:14,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:14,521 INFO L85 PathProgramCache]: Analyzing trace with hash 2031360974, now seen corresponding path program 1 times [2022-11-03 02:26:14,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:14,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148366443] [2022-11-03 02:26:14,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:14,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:15,784 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 02:26:15,784 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:15,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148366443] [2022-11-03 02:26:15,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148366443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:15,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:15,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:26:15,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721449723] [2022-11-03 02:26:15,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:15,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:26:15,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:15,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:26:15,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:26:15,787 INFO L87 Difference]: Start difference. First operand 159 states and 196 transitions. Second operand has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:16,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:16,925 INFO L93 Difference]: Finished difference Result 253 states and 308 transitions. [2022-11-03 02:26:16,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 02:26:16,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-03 02:26:16,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:16,929 INFO L225 Difference]: With dead ends: 253 [2022-11-03 02:26:16,929 INFO L226 Difference]: Without dead ends: 250 [2022-11-03 02:26:16,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:26:16,931 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 288 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:16,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 203 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:26:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-11-03 02:26:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 234. [2022-11-03 02:26:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.2613065326633166) internal successors, (251), 214 states have internal predecessors, (251), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:26:16,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 290 transitions. [2022-11-03 02:26:16,976 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 290 transitions. Word has length 21 [2022-11-03 02:26:16,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:16,976 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 290 transitions. [2022-11-03 02:26:16,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 290 transitions. [2022-11-03 02:26:16,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-03 02:26:16,978 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:16,978 INFO L195 NwaCegarLoop]: trace histogram [1, 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 02:26:16,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 02:26:16,978 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:16,979 INFO L85 PathProgramCache]: Analyzing trace with hash -66680349, now seen corresponding path program 1 times [2022-11-03 02:26:16,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:16,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70368334] [2022-11-03 02:26:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:16,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:17,915 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 02:26:17,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70368334] [2022-11-03 02:26:17,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70368334] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:17,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:17,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-03 02:26:17,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908813821] [2022-11-03 02:26:17,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:17,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-03 02:26:17,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:17,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-03 02:26:17,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-11-03 02:26:17,917 INFO L87 Difference]: Start difference. First operand 234 states and 290 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:19,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:19,014 INFO L93 Difference]: Finished difference Result 254 states and 309 transitions. [2022-11-03 02:26:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 02:26:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-03 02:26:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:19,018 INFO L225 Difference]: With dead ends: 254 [2022-11-03 02:26:19,018 INFO L226 Difference]: Without dead ends: 251 [2022-11-03 02:26:19,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-11-03 02:26:19,024 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 329 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:19,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 192 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 02:26:19,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-03 02:26:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 234. [2022-11-03 02:26:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.256281407035176) internal successors, (250), 214 states have internal predecessors, (250), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:26:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 289 transitions. [2022-11-03 02:26:19,089 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 289 transitions. Word has length 24 [2022-11-03 02:26:19,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:19,090 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 289 transitions. [2022-11-03 02:26:19,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:19,090 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 289 transitions. [2022-11-03 02:26:19,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 02:26:19,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:19,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:19,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 02:26:19,093 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:19,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:19,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1858713401, now seen corresponding path program 1 times [2022-11-03 02:26:19,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:19,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488952135] [2022-11-03 02:26:19,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:19,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:20,634 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 02:26:20,635 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:20,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488952135] [2022-11-03 02:26:20,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488952135] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:20,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:20,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-03 02:26:20,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853887972] [2022-11-03 02:26:20,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:20,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 02:26:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 02:26:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-11-03 02:26:20,637 INFO L87 Difference]: Start difference. First operand 234 states and 289 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:22,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:22,331 INFO L93 Difference]: Finished difference Result 251 states and 304 transitions. [2022-11-03 02:26:22,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:26:22,332 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-11-03 02:26:22,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:22,334 INFO L225 Difference]: With dead ends: 251 [2022-11-03 02:26:22,334 INFO L226 Difference]: Without dead ends: 248 [2022-11-03 02:26:22,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-03 02:26:22,340 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 325 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:22,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 220 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:26:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-03 02:26:22,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 234. [2022-11-03 02:26:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 199 states have (on average 1.2512562814070352) internal successors, (249), 214 states have internal predecessors, (249), 28 states have call successors, (28), 8 states have call predecessors, (28), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 02:26:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 288 transitions. [2022-11-03 02:26:22,404 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 288 transitions. Word has length 27 [2022-11-03 02:26:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:22,405 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 288 transitions. [2022-11-03 02:26:22,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 288 transitions. [2022-11-03 02:26:22,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-03 02:26:22,406 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:22,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:22,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 02:26:22,407 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:22,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:22,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1917225074, now seen corresponding path program 1 times [2022-11-03 02:26:22,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:22,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223553044] [2022-11-03 02:26:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:22,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:26:24,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223553044] [2022-11-03 02:26:24,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223553044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:24,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931159996] [2022-11-03 02:26:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:24,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:24,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:24,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:24,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 02:26:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:24,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-03 02:26:24,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:24,752 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:26:24,753 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 02:26:24,769 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 14 treesize of output 16 [2022-11-03 02:26:24,780 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 14 treesize of output 16 [2022-11-03 02:26:24,852 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 7 treesize of output 3 [2022-11-03 02:26:24,856 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 7 treesize of output 3 [2022-11-03 02:26:25,055 INFO L356 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2022-11-03 02:26:25,057 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_BEFORE_CALL_2| input size 41 context size 41 output size 41 [2022-11-03 02:26:25,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102670267] [2022-11-03 02:26:25,077 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 02:26:25,077 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:26:25,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:26:25,085 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:26:25,085 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:26:25,177 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 02:26:25,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-03 02:26:25,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,209 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 02:26:25,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:26:25,288 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:26:25,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:26:25,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:26:25,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:26:25,399 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 02:26:25,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-11-03 02:26:25,435 INFO L356 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-03 02:26:25,435 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 1 case distinctions, treesize of input 39 treesize of output 31 [2022-11-03 02:26:25,473 INFO L356 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-03 02:26:25,473 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 1 case distinctions, treesize of input 33 treesize of output 31 [2022-11-03 02:26:25,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,608 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-03 02:26:25,609 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-03 02:26:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,725 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-03 02:26:25,725 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-03 02:26:25,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:26:25,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,855 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:26:25,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,867 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:26:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,920 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:26:25,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:26:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:25,948 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:26:25,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:26:26,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:26:26,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:26:26,093 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 02:26:26,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:26,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:26:26,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:26,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:26:26,219 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:26:26,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-03 02:26:26,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-03 02:26:26,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 02:26:26,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:26,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:26,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 02:26:26,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:26,471 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:26,547 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:26:26,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 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 02:26:26,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:26:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:26,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:27,011 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:26:27,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 02:26:27,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:27,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:27,089 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:26:27,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-03 02:26:27,184 INFO L356 Elim1Store]: treesize reduction 76, result has 24.8 percent of original size [2022-11-03 02:26:27,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 215 treesize of output 224 [2022-11-03 02:26:27,297 INFO L356 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2022-11-03 02:26:27,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 218 treesize of output 234 [2022-11-03 02:26:27,336 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:26:27,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 218 [2022-11-03 02:26:27,871 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:27,871 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 196 treesize of output 182 [2022-11-03 02:26:27,890 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:27,890 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 182 treesize of output 168 [2022-11-03 02:26:27,905 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:26:27,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:26:28,011 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:28,011 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 196 treesize of output 182 [2022-11-03 02:26:28,026 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:28,026 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 182 treesize of output 168 [2022-11-03 02:26:28,047 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:26:28,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:26:28,111 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 19 treesize of output 1 [2022-11-03 02:26:28,116 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 13 treesize of output 9 [2022-11-03 02:26:28,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 11 [2022-11-03 02:26:28,160 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-03 02:26:28,213 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-03 02:26:28,380 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 74 for LOIs [2022-11-03 02:26:28,396 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:26:34,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3651#(and (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6| Int)) (and (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6| |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|) 12) 12) (not (= |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6| 0)) (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|)) (= (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|) 20) (not (= |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6| 1)) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|) 1) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_6|))) (= 22 (select |#length| 2)) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select |#valid| 1) 1) (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) |~#gl_list~0.offset|) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) |~#gl_list~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:26:34,711 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:26:34,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:34,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-03 02:26:34,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704295127] [2022-11-03 02:26:34,711 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:26:34,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:26:34,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:34,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:26:34,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=943, Unknown=15, NotChecked=0, Total=1056 [2022-11-03 02:26:34,714 INFO L87 Difference]: Start difference. First operand 234 states and 288 transitions. Second operand has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:26:36,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:36,600 INFO L93 Difference]: Finished difference Result 343 states and 415 transitions. [2022-11-03 02:26:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:26:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-11-03 02:26:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:36,604 INFO L225 Difference]: With dead ends: 343 [2022-11-03 02:26:36,605 INFO L226 Difference]: Without dead ends: 340 [2022-11-03 02:26:36,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=186, Invalid=1604, Unknown=16, NotChecked=0, Total=1806 [2022-11-03 02:26:36,609 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 774 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 1199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:36,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [780 Valid, 213 Invalid, 1199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:26:36,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-03 02:26:36,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 309. [2022-11-03 02:26:36,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.250936329588015) internal successors, (334), 283 states have internal predecessors, (334), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:26:36,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 382 transitions. [2022-11-03 02:26:36,656 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 382 transitions. Word has length 29 [2022-11-03 02:26:36,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:36,658 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 382 transitions. [2022-11-03 02:26:36,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:26:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 382 transitions. [2022-11-03 02:26:36,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 02:26:36,665 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:36,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:36,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:36,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-03 02:26:36,887 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:36,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:36,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1990057232, now seen corresponding path program 1 times [2022-11-03 02:26:36,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:36,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923859152] [2022-11-03 02:26:36,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:36,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:38,255 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 02:26:38,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:38,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923859152] [2022-11-03 02:26:38,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923859152] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:38,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:38,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:26:38,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737410944] [2022-11-03 02:26:38,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:26:38,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:38,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:26:38,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:26:38,257 INFO L87 Difference]: Start difference. First operand 309 states and 382 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:40,141 INFO L93 Difference]: Finished difference Result 325 states and 396 transitions. [2022-11-03 02:26:40,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:26:40,144 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-11-03 02:26:40,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:40,145 INFO L225 Difference]: With dead ends: 325 [2022-11-03 02:26:40,146 INFO L226 Difference]: Without dead ends: 322 [2022-11-03 02:26:40,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-11-03 02:26:40,147 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 298 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:40,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 222 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-03 02:26:40,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-03 02:26:40,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 309. [2022-11-03 02:26:40,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.247191011235955) internal successors, (333), 283 states have internal predecessors, (333), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:26:40,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 381 transitions. [2022-11-03 02:26:40,192 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 381 transitions. Word has length 30 [2022-11-03 02:26:40,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:40,194 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 381 transitions. [2022-11-03 02:26:40,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:40,194 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 381 transitions. [2022-11-03 02:26:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-03 02:26:40,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:40,198 INFO L195 NwaCegarLoop]: trace histogram [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 02:26:40,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-03 02:26:40,199 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1829333469, now seen corresponding path program 1 times [2022-11-03 02:26:40,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501421284] [2022-11-03 02:26:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:40,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:26:41,872 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501421284] [2022-11-03 02:26:41,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501421284] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:41,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681986816] [2022-11-03 02:26:41,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:41,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:41,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:41,873 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:41,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 02:26:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:42,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-03 02:26:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:42,107 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:26:42,108 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:26:42,116 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 02:26:42,137 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:26:42,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:26:42,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-03 02:26:42,211 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 7 treesize of output 3 [2022-11-03 02:26:42,232 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 7 treesize of output 3 [2022-11-03 02:26:42,419 INFO L356 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2022-11-03 02:26:42,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_BEFORE_CALL_17| input size 38 context size 38 output size 38 [2022-11-03 02:26:42,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117633403] [2022-11-03 02:26:42,429 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:26:42,429 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:26:42,430 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:26:42,430 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:26:42,431 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:26:42,514 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:26:42,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:26:42,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 02:26:42,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:42,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:26:42,564 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:26:42,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:42,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:26:42,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:42,723 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-03 02:26:42,724 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-03 02:26:42,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:42,839 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-03 02:26:42,840 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-03 02:26:42,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:42,998 INFO L356 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-03 02:26:42,998 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-03 02:26:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,045 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:26:43,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,055 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:26:43,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:26:43,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,120 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:26:43,130 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:26:43,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,139 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:26:43,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:26:43,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:26:43,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:26:43,239 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 02:26:43,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:26:43,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:26:43,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-03 02:26:43,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,360 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:26:43,360 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 57 [2022-11-03 02:26:43,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:43,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:43,442 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:26:43,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:43,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:26:43,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:26:43,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:26:43,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:26:43,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:26:43,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:43,947 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:26:43,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 02:26:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:26:43,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:26:44,037 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:26:44,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-03 02:26:44,137 INFO L356 Elim1Store]: treesize reduction 76, result has 24.8 percent of original size [2022-11-03 02:26:44,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 215 treesize of output 224 [2022-11-03 02:26:44,250 INFO L356 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2022-11-03 02:26:44,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 218 treesize of output 234 [2022-11-03 02:26:44,320 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:26:44,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 218 [2022-11-03 02:26:44,858 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:44,858 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 196 treesize of output 182 [2022-11-03 02:26:44,876 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:44,877 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 182 treesize of output 168 [2022-11-03 02:26:44,891 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:26:44,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:26:44,995 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:44,996 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 196 treesize of output 182 [2022-11-03 02:26:45,015 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:26:45,015 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 182 treesize of output 168 [2022-11-03 02:26:45,031 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:26:45,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:26:45,085 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 11 [2022-11-03 02:26:45,092 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 13 treesize of output 9 [2022-11-03 02:26:45,103 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 19 treesize of output 1 [2022-11-03 02:26:45,125 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-03 02:26:45,197 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-03 02:26:45,461 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 79 for LOIs [2022-11-03 02:26:45,476 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:26:51,749 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5623#(and (= 22 (select |#length| 2)) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15| Int)) (and (not (= 1 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|)) (= (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|) 20) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|) 1) (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15| |#StackHeapBarrier|) (not (= 0 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|)) (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|)) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|)) (= 12 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|) 12)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_15|))) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:26:51,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:26:51,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:26:51,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-03 02:26:51,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62493202] [2022-11-03 02:26:51,750 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:26:51,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 02:26:51,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:51,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 02:26:51,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1071, Unknown=15, NotChecked=0, Total=1190 [2022-11-03 02:26:51,752 INFO L87 Difference]: Start difference. First operand 309 states and 381 transitions. Second operand has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:26:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:53,507 INFO L93 Difference]: Finished difference Result 341 states and 411 transitions. [2022-11-03 02:26:53,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-03 02:26:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-11-03 02:26:53,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:53,521 INFO L225 Difference]: With dead ends: 341 [2022-11-03 02:26:53,521 INFO L226 Difference]: Without dead ends: 338 [2022-11-03 02:26:53,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=197, Invalid=1858, Unknown=15, NotChecked=0, Total=2070 [2022-11-03 02:26:53,525 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 602 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:53,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [608 Valid, 216 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-03 02:26:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-03 02:26:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 309. [2022-11-03 02:26:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.243445692883895) internal successors, (332), 283 states have internal predecessors, (332), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:26:53,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 380 transitions. [2022-11-03 02:26:53,594 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 380 transitions. Word has length 32 [2022-11-03 02:26:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:53,594 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 380 transitions. [2022-11-03 02:26:53,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:26:53,595 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 380 transitions. [2022-11-03 02:26:53,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-03 02:26:53,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:53,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:26:53,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 02:26:53,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-03 02:26:53,811 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:53,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash -2141730359, now seen corresponding path program 1 times [2022-11-03 02:26:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:53,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773213453] [2022-11-03 02:26:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:54,617 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 02:26:54,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:54,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773213453] [2022-11-03 02:26:54,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773213453] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:26:54,617 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:26:54,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 02:26:54,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102546312] [2022-11-03 02:26:54,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:26:54,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 02:26:54,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:26:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 02:26:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-11-03 02:26:54,619 INFO L87 Difference]: Start difference. First operand 309 states and 380 transitions. Second operand has 12 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:55,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:26:55,976 INFO L93 Difference]: Finished difference Result 324 states and 393 transitions. [2022-11-03 02:26:55,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 02:26:55,977 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-03 02:26:55,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:26:55,979 INFO L225 Difference]: With dead ends: 324 [2022-11-03 02:26:55,979 INFO L226 Difference]: Without dead ends: 321 [2022-11-03 02:26:55,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2022-11-03 02:26:55,980 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 395 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 954 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 954 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:26:55,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 200 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 954 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-03 02:26:55,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-11-03 02:26:56,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 309. [2022-11-03 02:26:56,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.2397003745318351) internal successors, (331), 283 states have internal predecessors, (331), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:26:56,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 379 transitions. [2022-11-03 02:26:56,040 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 379 transitions. Word has length 33 [2022-11-03 02:26:56,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:26:56,040 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 379 transitions. [2022-11-03 02:26:56,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:26:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 379 transitions. [2022-11-03 02:26:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-03 02:26:56,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:26:56,042 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-11-03 02:26:56,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-03 02:26:56,043 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:26:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:26:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash 929776377, now seen corresponding path program 1 times [2022-11-03 02:26:56,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:26:56,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308004025] [2022-11-03 02:26:56,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:56,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:26:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:59,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:26:59,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:26:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308004025] [2022-11-03 02:26:59,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308004025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:26:59,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105196911] [2022-11-03 02:26:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:26:59,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:26:59,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:26:59,366 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:26:59,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 02:26:59,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:26:59,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 161 conjunts are in the unsatisfiable core [2022-11-03 02:26:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:26:59,643 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:26:59,644 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 02:26:59,663 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:26:59,664 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:26:59,675 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 02:26:59,690 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 02:26:59,690 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 1 case distinctions, treesize of input 21 treesize of output 21 [2022-11-03 02:26:59,777 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 15 treesize of output 7 [2022-11-03 02:26:59,789 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 7 treesize of output 3 [2022-11-03 02:27:00,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,142 INFO L356 Elim1Store]: treesize reduction 91, result has 12.5 percent of original size [2022-11-03 02:27:00,143 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_BEFORE_CALL_32| input size 65 context size 65 output size 65 [2022-11-03 02:27:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [959677939] [2022-11-03 02:27:00,147 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 02:27:00,147 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:00,148 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:00,148 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:00,149 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:00,212 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 02:27:00,212 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-03 02:27:00,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,247 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 02:27:00,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:27:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,275 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 02:27:00,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:27:00,348 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:27:00,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:27:00,365 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:27:00,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,522 INFO L356 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-03 02:27:00,522 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-03 02:27:00,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,615 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-03 02:27:00,616 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-03 02:27:00,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,747 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-03 02:27:00,748 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-03 02:27:00,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,792 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:27:00,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,800 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:27:00,810 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:27:00,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,852 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:27:00,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:27:00,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:00,872 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:27:00,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:27:00,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:00,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:27:00,994 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 02:27:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:01,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:27:01,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:01,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:27:01,106 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:27:01,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-03 02:27:01,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-03 02:27:01,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:01,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:01,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 02:27:01,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 02:27:01,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:01,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:01,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:27:01,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:01,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:27:01,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:01,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:27:01,725 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:27:01,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 02:27:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:01,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:27:01,811 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:27:01,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-03 02:27:01,901 INFO L356 Elim1Store]: treesize reduction 76, result has 24.8 percent of original size [2022-11-03 02:27:01,901 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 215 treesize of output 224 [2022-11-03 02:27:02,020 INFO L356 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2022-11-03 02:27:02,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 218 treesize of output 234 [2022-11-03 02:27:02,062 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 02:27:02,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 216 treesize of output 218 [2022-11-03 02:27:02,334 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:02,334 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 196 treesize of output 182 [2022-11-03 02:27:02,352 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:02,352 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 182 treesize of output 168 [2022-11-03 02:27:02,365 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:27:02,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:27:02,450 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:02,450 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 196 treesize of output 182 [2022-11-03 02:27:02,466 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:02,467 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 182 treesize of output 168 [2022-11-03 02:27:02,478 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 02:27:02,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:27:02,521 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 13 treesize of output 9 [2022-11-03 02:27:02,537 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 19 treesize of output 1 [2022-11-03 02:27:02,544 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 11 [2022-11-03 02:27:02,566 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-03 02:27:02,626 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-03 02:27:02,905 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 88 for LOIs [2022-11-03 02:27:02,925 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:10,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7604#(and (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|))) (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)))) (= 22 (select |#length| 2)) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (or (not (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0)) (not (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0))) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|))) (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)))) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24| Int)) (and (= (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|) 20) (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24| |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|) 12) 12) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|)) (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|)) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|) 1) (not (= 1 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|) (not (= 0 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_24|)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:27:10,100 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:10,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:10,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-03 02:27:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144740838] [2022-11-03 02:27:10,100 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:10,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:27:10,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:27:10,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1276, Unknown=17, NotChecked=0, Total=1406 [2022-11-03 02:27:10,102 INFO L87 Difference]: Start difference. First operand 309 states and 379 transitions. Second operand has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:27:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:13,180 INFO L93 Difference]: Finished difference Result 337 states and 404 transitions. [2022-11-03 02:27:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-03 02:27:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-11-03 02:27:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:13,182 INFO L225 Difference]: With dead ends: 337 [2022-11-03 02:27:13,182 INFO L226 Difference]: Without dead ends: 334 [2022-11-03 02:27:13,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=234, Invalid=2400, Unknown=18, NotChecked=0, Total=2652 [2022-11-03 02:27:13,184 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 533 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:13,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 401 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-03 02:27:13,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-03 02:27:13,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 309. [2022-11-03 02:27:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.2359550561797752) internal successors, (330), 283 states have internal predecessors, (330), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:27:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 378 transitions. [2022-11-03 02:27:13,245 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 378 transitions. Word has length 35 [2022-11-03 02:27:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:13,245 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 378 transitions. [2022-11-03 02:27:13,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:27:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 378 transitions. [2022-11-03 02:27:13,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 02:27:13,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:13,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:13,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:13,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:13,467 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:13,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1272507570, now seen corresponding path program 2 times [2022-11-03 02:27:13,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:13,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112461002] [2022-11-03 02:27:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:13,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-03 02:27:16,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112461002] [2022-11-03 02:27:16,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112461002] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:16,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795736263] [2022-11-03 02:27:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:27:16,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:16,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:16,334 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:16,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 02:27:18,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:27:18,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:27:18,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 180 conjunts are in the unsatisfiable core [2022-11-03 02:27:18,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:18,209 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:27:18,210 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 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-03 02:27:18,220 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 11 treesize of output 7 [2022-11-03 02:27:18,237 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:27:18,238 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:27:18,244 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 02:27:18,265 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:27:18,266 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 02:27:18,343 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 15 treesize of output 7 [2022-11-03 02:27:18,350 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 7 treesize of output 3 [2022-11-03 02:27:18,488 INFO L356 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2022-11-03 02:27:18,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_BEFORE_CALL_47| input size 40 context size 40 output size 40 [2022-11-03 02:27:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1246310624] [2022-11-03 02:27:18,491 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 02:27:18,492 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:18,492 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:18,492 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:18,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:18,563 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:27:18,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:27:18,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-03 02:27:18,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:18,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:27:18,597 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2022-11-03 02:27:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:18,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:27:18,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:18,740 INFO L356 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-03 02:27:18,740 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-03 02:27:18,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:18,816 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-03 02:27:18,816 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-03 02:27:18,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:18,918 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-03 02:27:18,918 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-03 02:27:18,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,000 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:27:19,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,009 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:27:19,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:27:19,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,044 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:27:19,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:27:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,061 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:27:19,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:19,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:27:19,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:27:19,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:27:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:27:19,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-03 02:27:19,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,238 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 02:27:19,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 37 treesize of output 57 [2022-11-03 02:27:19,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 02:27:19,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:19,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:19,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:27:19,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2022-11-03 02:27:19,371 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:19,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:19,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:27:19,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:27:19,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:19,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:27:19,752 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:27:19,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 02:27:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:19,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:27:19,842 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:27:19,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-03 02:27:20,011 INFO L356 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2022-11-03 02:27:20,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 220 treesize of output 248 [2022-11-03 02:27:20,066 INFO L356 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-03 02:27:20,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 222 [2022-11-03 02:27:20,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 218 [2022-11-03 02:27:20,636 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:20,637 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 196 treesize of output 182 [2022-11-03 02:27:20,652 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:20,652 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 182 treesize of output 168 [2022-11-03 02:27:20,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:27:20,753 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:20,754 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 196 treesize of output 182 [2022-11-03 02:27:20,769 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:20,770 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 182 treesize of output 168 [2022-11-03 02:27:20,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:27:20,826 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 19 treesize of output 1 [2022-11-03 02:27:20,832 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 11 [2022-11-03 02:27:20,837 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 13 treesize of output 9 [2022-11-03 02:27:20,865 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 129 for LOIs [2022-11-03 02:27:21,008 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-03 02:27:21,144 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 74 for LOIs [2022-11-03 02:27:21,159 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:36,139 WARN L234 SmtUtils]: Spent 13.15s on a formula simplification. DAG size of input: 203 DAG size of output: 186 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-03 02:27:38,047 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8632#(and (= 22 (select |#length| 2)) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select |#valid| 1) 1) (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) |~#gl_list~0.offset|) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|) 12) 12) (= (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|) 20) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|) 1) (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|)) (not (= 0 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|)) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|) (not (= 1 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33|)) (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_33| |#StackHeapBarrier|))) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) |~#gl_list~0.base|) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:27:38,047 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:38,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:38,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-03 02:27:38,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042063072] [2022-11-03 02:27:38,048 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:38,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:27:38,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:38,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:27:38,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1188, Unknown=21, NotChecked=0, Total=1332 [2022-11-03 02:27:38,050 INFO L87 Difference]: Start difference. First operand 309 states and 378 transitions. Second operand has 19 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:27:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:39,631 INFO L93 Difference]: Finished difference Result 328 states and 395 transitions. [2022-11-03 02:27:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:27:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2022-11-03 02:27:39,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:39,633 INFO L225 Difference]: With dead ends: 328 [2022-11-03 02:27:39,633 INFO L226 Difference]: Without dead ends: 325 [2022-11-03 02:27:39,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=199, Invalid=1753, Unknown=28, NotChecked=0, Total=1980 [2022-11-03 02:27:39,635 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 322 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:39,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 238 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:27:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-03 02:27:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 309. [2022-11-03 02:27:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.2322097378277153) internal successors, (329), 283 states have internal predecessors, (329), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:27:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 377 transitions. [2022-11-03 02:27:39,701 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 377 transitions. Word has length 37 [2022-11-03 02:27:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:39,702 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 377 transitions. [2022-11-03 02:27:39,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:27:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 377 transitions. [2022-11-03 02:27:39,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-03 02:27:39,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:39,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:39,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 02:27:39,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:39,915 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:39,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1552238075, now seen corresponding path program 1 times [2022-11-03 02:27:39,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:39,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062202309] [2022-11-03 02:27:39,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:39,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:40,918 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 02:27:40,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062202309] [2022-11-03 02:27:40,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062202309] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 02:27:40,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 02:27:40,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-03 02:27:40,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732592411] [2022-11-03 02:27:40,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 02:27:40,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-03 02:27:40,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:40,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-03 02:27:40,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-11-03 02:27:40,921 INFO L87 Difference]: Start difference. First operand 309 states and 377 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:27:42,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:27:42,381 INFO L93 Difference]: Finished difference Result 322 states and 388 transitions. [2022-11-03 02:27:42,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-03 02:27:42,381 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-11-03 02:27:42,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:27:42,385 INFO L225 Difference]: With dead ends: 322 [2022-11-03 02:27:42,385 INFO L226 Difference]: Without dead ends: 319 [2022-11-03 02:27:42,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-11-03 02:27:42,390 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 339 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-03 02:27:42,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 225 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-03 02:27:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-03 02:27:42,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 309. [2022-11-03 02:27:42,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.2284644194756553) internal successors, (328), 283 states have internal predecessors, (328), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:27:42,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 376 transitions. [2022-11-03 02:27:42,450 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 376 transitions. Word has length 36 [2022-11-03 02:27:42,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:27:42,450 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 376 transitions. [2022-11-03 02:27:42,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 02:27:42,451 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 376 transitions. [2022-11-03 02:27:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-03 02:27:42,451 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:27:42,452 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-03 02:27:42,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-03 02:27:42,452 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:27:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:27:42,452 INFO L85 PathProgramCache]: Analyzing trace with hash 501463376, now seen corresponding path program 1 times [2022-11-03 02:27:42,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:27:42,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413610502] [2022-11-03 02:27:42,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:42,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:27:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 02:27:44,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:27:44,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413610502] [2022-11-03 02:27:44,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413610502] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:27:44,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395198726] [2022-11-03 02:27:44,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:27:44,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:27:44,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:27:44,959 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:27:44,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 02:27:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:27:45,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 139 conjunts are in the unsatisfiable core [2022-11-03 02:27:45,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:27:45,227 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:27:45,228 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 1 case distinctions, treesize of input 14 treesize of output 20 [2022-11-03 02:27:45,235 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 02:27:45,247 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 02:27:45,248 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 1 case distinctions, treesize of input 21 treesize of output 25 [2022-11-03 02:27:45,257 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 11 treesize of output 7 [2022-11-03 02:27:45,278 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:27:45,278 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 02:27:45,353 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 7 treesize of output 3 [2022-11-03 02:27:45,360 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 15 treesize of output 7 [2022-11-03 02:27:45,698 INFO L356 Elim1Store]: treesize reduction 166, result has 5.1 percent of original size [2022-11-03 02:27:45,698 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_BEFORE_CALL_62| input size 92 context size 92 output size 92 [2022-11-03 02:27:45,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1080774612] [2022-11-03 02:27:45,701 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-03 02:27:45,701 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:27:45,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:27:45,701 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:27:45,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:27:45,756 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 02:27:45,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-03 02:27:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:45,781 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 02:27:45,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:27:45,804 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:27:45,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2022-11-03 02:27:45,860 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:27:45,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:27:45,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:45,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2022-11-03 02:27:45,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:45,976 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-03 02:27:45,976 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-03 02:27:46,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,106 INFO L356 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-03 02:27:46,106 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-03 02:27:46,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,224 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-03 02:27:46,225 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-03 02:27:46,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,259 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:27:46,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:27:46,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,277 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:27:46,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:27:46,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,317 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-03 02:27:46,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,325 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:27:46,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:46,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:27:46,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:27:46,411 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 02:27:46,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:27:46,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:27:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:46,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-03 02:27:46,529 INFO L356 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2022-11-03 02:27:46,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 37 treesize of output 65 [2022-11-03 02:27:46,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 02:27:46,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:46,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:46,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:46,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:27:46,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 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 02:27:46,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:27:46,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:46,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:27:47,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:47,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:27:47,080 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:27:47,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 02:27:47,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:27:47,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:27:47,162 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:27:47,163 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-03 02:27:47,287 INFO L356 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2022-11-03 02:27:47,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 220 treesize of output 248 [2022-11-03 02:27:47,346 INFO L356 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-03 02:27:47,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 222 [2022-11-03 02:27:47,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 218 [2022-11-03 02:27:47,702 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:47,703 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 196 treesize of output 182 [2022-11-03 02:27:47,744 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:47,745 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 182 treesize of output 168 [2022-11-03 02:27:47,753 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:27:47,861 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:47,862 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 196 treesize of output 182 [2022-11-03 02:27:47,878 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:27:47,878 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 182 treesize of output 168 [2022-11-03 02:27:47,885 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:27:47,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 11 [2022-11-03 02:27:47,936 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 19 treesize of output 1 [2022-11-03 02:27:47,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:27:47,962 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-03 02:27:48,007 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-03 02:27:48,270 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 31 for LOIs [2022-11-03 02:27:48,276 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:27:59,350 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10573#(and (<= |~#gl_list~0.base| 3) (<= 0 |#NULL.base|) (<= 3 |~#gl_list~0.base|) (<= |#NULL.offset| 0) (<= |#NULL.base| 0) (<= 0 |~#gl_list~0.offset|) (<= 0 |#NULL.offset|) (exists ((v_inspect_~head.base_BEFORE_CALL_5 Int) (v_inspect_~head.offset_BEFORE_CALL_5 Int)) (and (= v_inspect_~head.base_BEFORE_CALL_5 (select (select |#memory_$Pointer$.base| v_inspect_~head.base_BEFORE_CALL_5) (+ v_inspect_~head.offset_BEFORE_CALL_5 4))) (= v_inspect_~head.offset_BEFORE_CALL_5 (select (select |#memory_$Pointer$.offset| v_inspect_~head.base_BEFORE_CALL_5) (+ v_inspect_~head.offset_BEFORE_CALL_5 4))))) (<= 0 |#StackHeapBarrier|) (<= |~#gl_list~0.offset| 0))' at error location [2022-11-03 02:27:59,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:27:59,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:27:59,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-03 02:27:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658604057] [2022-11-03 02:27:59,351 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:27:59,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-03 02:27:59,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:27:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-03 02:27:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1424, Unknown=18, NotChecked=0, Total=1560 [2022-11-03 02:27:59,352 INFO L87 Difference]: Start difference. First operand 309 states and 376 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:28:02,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:02,379 INFO L93 Difference]: Finished difference Result 337 states and 402 transitions. [2022-11-03 02:28:02,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-03 02:28:02,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-11-03 02:28:02,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:02,385 INFO L225 Difference]: With dead ends: 337 [2022-11-03 02:28:02,385 INFO L226 Difference]: Without dead ends: 334 [2022-11-03 02:28:02,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=177, Invalid=2254, Unknown=19, NotChecked=0, Total=2450 [2022-11-03 02:28:02,387 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 465 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 2122 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 2122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:02,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 438 Invalid, 2218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 2122 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-03 02:28:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-03 02:28:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 309. [2022-11-03 02:28:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.2247191011235956) internal successors, (327), 283 states have internal predecessors, (327), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:28:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 375 transitions. [2022-11-03 02:28:02,457 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 375 transitions. Word has length 38 [2022-11-03 02:28:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:02,458 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 375 transitions. [2022-11-03 02:28:02,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 02:28:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 375 transitions. [2022-11-03 02:28:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 02:28:02,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:02,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:02,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:02,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-03 02:28:02,671 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2143919517, now seen corresponding path program 2 times [2022-11-03 02:28:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:02,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831633119] [2022-11-03 02:28:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:02,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:02,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 02:28:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-03 02:28:04,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 02:28:04,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831633119] [2022-11-03 02:28:04,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831633119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 02:28:04,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600097154] [2022-11-03 02:28:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 02:28:04,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:04,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 02:28:04,666 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 02:28:04,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 02:28:05,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-03 02:28:05,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 02:28:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 180 conjunts are in the unsatisfiable core [2022-11-03 02:28:05,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 02:28:05,522 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:28:05,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 02:28:05,530 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 14 treesize of output 16 [2022-11-03 02:28:05,538 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 14 treesize of output 16 [2022-11-03 02:28:05,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 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 02:28:05,566 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 7 treesize of output 3 [2022-11-03 02:28:05,695 INFO L356 Elim1Store]: treesize reduction 77, result has 3.8 percent of original size [2022-11-03 02:28:05,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: var is still there: |v_#memory_$Pointer$.base_BEFORE_CALL_77| input size 38 context size 38 output size 38 [2022-11-03 02:28:05,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1773737490] [2022-11-03 02:28:05,698 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 02:28:05,698 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 02:28:05,698 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 02:28:05,698 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 02:28:05,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 02:28:05,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:05,731 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 02:28:05,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:28:05,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:05,756 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 02:28:05,757 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2022-11-03 02:28:05,811 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-11-03 02:28:05,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 42 [2022-11-03 02:28:05,842 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 02:28:05,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 32 [2022-11-03 02:28:05,909 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-03 02:28:05,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-03 02:28:05,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,049 INFO L356 Elim1Store]: treesize reduction 131, result has 34.8 percent of original size [2022-11-03 02:28:06,050 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 3 case distinctions, treesize of input 81 treesize of output 70 [2022-11-03 02:28:06,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,162 INFO L356 Elim1Store]: treesize reduction 128, result has 32.3 percent of original size [2022-11-03 02:28:06,162 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 3 case distinctions, treesize of input 85 treesize of output 71 [2022-11-03 02:28:06,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,263 INFO L356 Elim1Store]: treesize reduction 147, result has 22.2 percent of original size [2022-11-03 02:28:06,263 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 3 case distinctions, treesize of input 85 treesize of output 52 [2022-11-03 02:28:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,294 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:28:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,305 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:28:06,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:28:06,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,344 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:28:06,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,354 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-11-03 02:28:06,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 02:28:06,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 02:28:06,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-03 02:28:06,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-03 02:28:06,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:28:06,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 6 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 02:28:06,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 38 [2022-11-03 02:28:06,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,540 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 02:28:06,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 53 [2022-11-03 02:28:06,556 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 02:28:06,593 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 02:28:06,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:28:06,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:28:06,652 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 02:28:06,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:28:06,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 5 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 02:28:06,720 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 19 treesize of output 1 [2022-11-03 02:28:06,750 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 02:28:06,758 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 11 [2022-11-03 02:28:06,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:06,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:07,030 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:28:07,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 02:28:07,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 02:28:07,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 02:28:07,111 INFO L356 Elim1Store]: treesize reduction 72, result has 27.3 percent of original size [2022-11-03 02:28:07,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 230 treesize of output 234 [2022-11-03 02:28:07,219 INFO L356 Elim1Store]: treesize reduction 96, result has 31.9 percent of original size [2022-11-03 02:28:07,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 220 treesize of output 248 [2022-11-03 02:28:07,260 INFO L356 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2022-11-03 02:28:07,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 222 [2022-11-03 02:28:07,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 216 treesize of output 218 [2022-11-03 02:28:07,581 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:28:07,582 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 196 treesize of output 182 [2022-11-03 02:28:07,594 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:28:07,594 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 182 treesize of output 168 [2022-11-03 02:28:07,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:28:07,681 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:28:07,681 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 196 treesize of output 182 [2022-11-03 02:28:07,696 INFO L356 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-03 02:28:07,696 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 182 treesize of output 168 [2022-11-03 02:28:07,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 176 treesize of output 164 [2022-11-03 02:28:07,758 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 19 treesize of output 1 [2022-11-03 02:28:07,763 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 11 [2022-11-03 02:28:07,770 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 13 treesize of output 9 [2022-11-03 02:28:07,787 INFO L197 IcfgInterpreter]: Interpreting procedure list_add with input of size 29 for LOIs [2022-11-03 02:28:07,832 INFO L197 IcfgInterpreter]: Interpreting procedure inspect with input of size 63 for LOIs [2022-11-03 02:28:08,033 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 79 for LOIs [2022-11-03 02:28:08,046 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 02:28:13,779 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11594#(and (= 22 (select |#length| 2)) (exists ((|v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51| Int)) (and (not (= 3 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|)) (not (= 1 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|)) (not (= 0 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|)) (= (select |#length| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|) 20) (< |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51| |#StackHeapBarrier|) (not (= 2 |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|)) (= (select |#valid| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|) 12) |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|) (= 12 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_gl_insert_~node~1#1.base_BEFORE_CALL_51|) 12)))) (= (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0) (= |~#gl_list~0.base| 3) (= 2 (select |#length| 1)) (= (select |#valid| 3) 1) (= (select |#length| 3) 8) (= (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) (+ 4 |~#gl_list~0.offset|)) 0) (= (select |#valid| 1) 1) (= (select |#valid| 0) 0) (= |~#gl_list~0.offset| 0) (= (select |#valid| 2) 1) (= |#NULL.offset| 0) (or (not (= |~#gl_list~0.base| (select (select |#memory_$Pointer$.base| |~#gl_list~0.base|) |~#gl_list~0.offset|))) (not (= |~#gl_list~0.offset| (select (select |#memory_$Pointer$.offset| |~#gl_list~0.base|) |~#gl_list~0.offset|)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 02:28:13,779 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 02:28:13,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 02:28:13,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-11-03 02:28:13,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469834758] [2022-11-03 02:28:13,779 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 02:28:13,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-03 02:28:13,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 02:28:13,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-03 02:28:13,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1262, Unknown=7, NotChecked=0, Total=1406 [2022-11-03 02:28:13,781 INFO L87 Difference]: Start difference. First operand 309 states and 375 transitions. Second operand has 19 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:28:15,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 02:28:15,550 INFO L93 Difference]: Finished difference Result 327 states and 391 transitions. [2022-11-03 02:28:15,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-03 02:28:15,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2022-11-03 02:28:15,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 02:28:15,552 INFO L225 Difference]: With dead ends: 327 [2022-11-03 02:28:15,552 INFO L226 Difference]: Without dead ends: 324 [2022-11-03 02:28:15,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=223, Invalid=1931, Unknown=8, NotChecked=0, Total=2162 [2022-11-03 02:28:15,554 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 347 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-03 02:28:15,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 369 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-03 02:28:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-03 02:28:15,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 309. [2022-11-03 02:28:15,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 267 states have (on average 1.2209737827715357) internal successors, (326), 283 states have internal predecessors, (326), 33 states have call successors, (33), 10 states have call predecessors, (33), 8 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-03 02:28:15,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 374 transitions. [2022-11-03 02:28:15,646 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 374 transitions. Word has length 40 [2022-11-03 02:28:15,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 02:28:15,646 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 374 transitions. [2022-11-03 02:28:15,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 02:28:15,646 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 374 transitions. [2022-11-03 02:28:15,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-03 02:28:15,647 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 02:28:15,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:15,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 02:28:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 02:28:15,861 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 02:28:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 02:28:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1366794378, now seen corresponding path program 1 times [2022-11-03 02:28:15,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 02:28:15,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305897815] [2022-11-03 02:28:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 02:28:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 02:28:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:28:15,888 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 02:28:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 02:28:15,928 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 02:28:15,935 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 02:28:15,936 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-03 02:28:15,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-03 02:28:15,941 INFO L444 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 02:28:15,946 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-03 02:28:16,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 02:28:16 BoogieIcfgContainer [2022-11-03 02:28:16,001 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-03 02:28:16,002 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-03 02:28:16,002 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-03 02:28:16,002 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-03 02:28:16,003 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 02:26:11" (3/4) ... [2022-11-03 02:28:16,008 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-03 02:28:16,063 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/witness.graphml [2022-11-03 02:28:16,063 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-03 02:28:16,064 INFO L158 Benchmark]: Toolchain (without parser) took 126507.96ms. Allocated memory was 130.0MB in the beginning and 497.0MB in the end (delta: 367.0MB). Free memory was 91.4MB in the beginning and 404.1MB in the end (delta: -312.8MB). Peak memory consumption was 53.4MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,064 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory was 109.9MB in the beginning and 109.8MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 02:28:16,064 INFO L158 Benchmark]: CACSL2BoogieTranslator took 840.31ms. Allocated memory is still 130.0MB. Free memory was 91.2MB in the beginning and 88.0MB in the end (delta: 3.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,065 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.94ms. Allocated memory is still 130.0MB. Free memory was 88.0MB in the beginning and 85.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,065 INFO L158 Benchmark]: Boogie Preprocessor took 43.46ms. Allocated memory is still 130.0MB. Free memory was 85.3MB in the beginning and 82.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,065 INFO L158 Benchmark]: RCFGBuilder took 902.70ms. Allocated memory is still 130.0MB. Free memory was 82.7MB in the beginning and 104.8MB in the end (delta: -22.1MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,066 INFO L158 Benchmark]: TraceAbstraction took 124601.08ms. Allocated memory was 130.0MB in the beginning and 497.0MB in the end (delta: 367.0MB). Free memory was 104.0MB in the beginning and 407.3MB in the end (delta: -303.2MB). Peak memory consumption was 64.3MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,066 INFO L158 Benchmark]: Witness Printer took 61.70ms. Allocated memory is still 497.0MB. Free memory was 407.3MB in the beginning and 404.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 02:28:16,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory was 109.9MB in the beginning and 109.8MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 840.31ms. Allocated memory is still 130.0MB. Free memory was 91.2MB in the beginning and 88.0MB in the end (delta: 3.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.94ms. Allocated memory is still 130.0MB. Free memory was 88.0MB in the beginning and 85.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.46ms. Allocated memory is still 130.0MB. Free memory was 85.3MB in the beginning and 82.7MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 902.70ms. Allocated memory is still 130.0MB. Free memory was 82.7MB in the beginning and 104.8MB in the end (delta: -22.1MB). Peak memory consumption was 35.3MB. Max. memory is 16.1GB. * TraceAbstraction took 124601.08ms. Allocated memory was 130.0MB in the beginning and 497.0MB in the end (delta: 367.0MB). Free memory was 104.0MB in the beginning and 407.3MB in the end (delta: -303.2MB). Peak memory consumption was 64.3MB. Max. memory is 16.1GB. * Witness Printer took 61.70ms. Allocated memory is still 497.0MB. Free memory was 407.3MB in the beginning and 404.1MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 840]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L850] struct list_head gl_list = { &(gl_list), &(gl_list) }; [L949] CALL gl_read() [L909] CALL gl_insert(__VERIFIER_nondet_int()) [L899] struct node *node = malloc(sizeof *node); [L900] COND FALSE !(!node) [L902] node->value = value VAL [\old(value)=6, gl_list={3:0}, node={5:0}, value=6] [L903] CALL list_add(&node->linkage, &gl_list) VAL [gl_list={3:0}] [L890] EXPR head->next [L890] CALL __list_add(new, head, head->next) [L878] next->prev = new [L879] new->next = next [L880] new->prev = prev [L881] prev->next = new [L890] RET __list_add(new, head, head->next) [L903] RET list_add(&node->linkage, &gl_list) VAL [\old(value)=6, gl_list={3:0}, node={5:0}, value=6] [L904] (&node->nested)->next = (&node->nested) [L904] (&node->nested)->next = (&node->nested) VAL [\old(value)=6, gl_list={3:0}, node={5:0}, value=6] [L909] RET gl_insert(__VERIFIER_nondet_int()) [L911] COND FALSE !(__VERIFIER_nondet_int()) [L949] RET gl_read() [L950] CALL inspect(&gl_list) VAL [gl_list={3:0}, head={3:0}] [L853] COND FALSE !(!(head)) VAL [gl_list={3:0}, head={3:0}, head={3:0}] [L854] EXPR head->next VAL [gl_list={3:0}, head={3:0}, head={3:0}, head->next={5:4}] [L854] COND FALSE !(!(head->next != head)) [L855] EXPR head->prev VAL [gl_list={3:0}, head={3:0}, head={3:0}, head->prev={5:4}] [L855] COND FALSE !(!(head->prev != head)) [L856] EXPR head->prev [L856] head = head->prev [L857] COND FALSE !(!(head)) VAL [gl_list={3:0}, head={3:0}, head={5:4}] [L858] EXPR head->next VAL [gl_list={3:0}, head={3:0}, head={5:4}, head->next={3:0}] [L858] COND FALSE !(!(head->next != head)) [L859] EXPR head->prev VAL [gl_list={3:0}, head={3:0}, head={5:4}, head->prev={3:0}] [L859] COND FALSE !(!(head->prev != head)) [L860] const struct node *node = ((struct node *)((char *)(head)-(unsigned long)(&((struct node *)0)->linkage))); VAL [gl_list={3:0}, head={5:4}, head={3:0}, node={5:0}] [L861] COND FALSE !(!(node)) VAL [gl_list={3:0}, head={3:0}, head={5:4}, node={5:0}] [L862] EXPR node->nested.next VAL [gl_list={3:0}, head={5:4}, head={3:0}, node={5:0}, node->nested.next={5:12}] [L862] COND FALSE !(!(node->nested.next == &node->nested)) [L863] EXPR node->nested.prev VAL [gl_list={3:0}, head={5:4}, head={3:0}, node={5:0}, node->nested.prev={53:55}] [L863] COND TRUE !(node->nested.prev == &node->nested) [L863] CALL fail() VAL [gl_list={3:0}] [L840] reach_error() VAL [gl_list={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 124.4s, OverallIterations: 16, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 23.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5610 SdHoareTripleChecker+Valid, 16.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5560 mSDsluCounter, 3925 SdHoareTripleChecker+Invalid, 14.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2993 mSDsCounter, 1172 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 14565 IncrementalHoareTripleChecker+Invalid, 15737 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1172 mSolverCounterUnsat, 1284 mSDtfsCounter, 14565 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 542 GetRequests, 126 SyntacticMatches, 16 SemanticMatches, 400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3249 ImplicationChecksByTransitivity, 62.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=309occurred in iteration=7, InterpolantAutomatonStates: 206, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 15 MinimizatonAttempts, 239 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.4s InterpolantComputationTime, 462 NumberOfCodeBlocks, 462 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 408 ConstructedInterpolants, 0 QuantifiedInterpolants, 9836 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 9 PerfectInterpolantSequences, 12/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-03 02:28:16,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ea706e77-e398-4d43-aa26-9943bc26918f/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE