./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-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_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/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_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/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_bc283928-7019-471f-9ec4-60dd0ed4b772/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 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 --- 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 04:01:40,161 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 04:01:40,164 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 04:01:40,211 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 04:01:40,212 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 04:01:40,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 04:01:40,218 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 04:01:40,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 04:01:40,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 04:01:40,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 04:01:40,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 04:01:40,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 04:01:40,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 04:01:40,237 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 04:01:40,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 04:01:40,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 04:01:40,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 04:01:40,243 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 04:01:40,244 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 04:01:40,253 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 04:01:40,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 04:01:40,255 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 04:01:40,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 04:01:40,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 04:01:40,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 04:01:40,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 04:01:40,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 04:01:40,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 04:01:40,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 04:01:40,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 04:01:40,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 04:01:40,275 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 04:01:40,277 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 04:01:40,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 04:01:40,280 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 04:01:40,280 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 04:01:40,281 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 04:01:40,282 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 04:01:40,282 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 04:01:40,283 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 04:01:40,284 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 04:01:40,285 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 04:01:40,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 04:01:40,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 04:01:40,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 04:01:40,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 04:01:40,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 04:01:40,327 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 04:01:40,327 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 04:01:40,328 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 04:01:40,328 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 04:01:40,328 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 04:01:40,329 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 04:01:40,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 04:01:40,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 04:01:40,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 04:01:40,330 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 04:01:40,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 04:01:40,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 04:01:40,331 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 04:01:40,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 04:01:40,332 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 04:01:40,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 04:01:40,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 04:01:40,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 04:01:40,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 04:01:40,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 04:01:40,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 04:01:40,335 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 04:01:40,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 04:01:40,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 04:01:40,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 04:01:40,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 04:01:40,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 04:01:40,338 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:40,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 04:01:40,338 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 04:01:40,338 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 04:01:40,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 04:01:40,339 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 04:01:40,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 04:01:40,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 04:01:40,339 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 04:01:40,340 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_bc283928-7019-471f-9ec4-60dd0ed4b772/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68e1c5cf050539b3ee8f058d38ff7af5aea2a400d05e41e0185e4509f45301e0 [2022-11-03 04:01:40,651 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 04:01:40,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 04:01:40,677 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 04:01:40,678 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 04:01:40,679 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 04:01:40,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-03 04:01:40,752 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/data/50cdac3bc/cc1c1bf3c1954d7ca897ae062a0ec477/FLAG56303e25d [2022-11-03 04:01:41,309 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 04:01:41,310 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i [2022-11-03 04:01:41,324 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/data/50cdac3bc/cc1c1bf3c1954d7ca897ae062a0ec477/FLAG56303e25d [2022-11-03 04:01:41,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/data/50cdac3bc/cc1c1bf3c1954d7ca897ae062a0ec477 [2022-11-03 04:01:41,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 04:01:41,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 04:01:41,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:41,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 04:01:41,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 04:01:41,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:41" (1/1) ... [2022-11-03 04:01:41,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1d3d53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:41, skipping insertion in model container [2022-11-03 04:01:41,629 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:01:41" (1/1) ... [2022-11-03 04:01:41,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 04:01:41,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 04:01:41,998 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_bc283928-7019-471f-9ec4-60dd0ed4b772/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-03 04:01:42,001 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:42,009 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 04:01:42,050 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_bc283928-7019-471f-9ec4-60dd0ed4b772/sv-benchmarks/c/list-ext3-properties/sll_of_sll_nondet_append-2.i[25013,25026] [2022-11-03 04:01:42,051 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 04:01:42,075 INFO L208 MainTranslator]: Completed translation [2022-11-03 04:01:42,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42 WrapperNode [2022-11-03 04:01:42,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 04:01:42,077 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:42,077 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 04:01:42,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 04:01:42,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,121 INFO L138 Inliner]: procedures = 129, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 180 [2022-11-03 04:01:42,121 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 04:01:42,122 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 04:01:42,122 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 04:01:42,123 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 04:01:42,133 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,133 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,186 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,187 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,190 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 04:01:42,191 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 04:01:42,191 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 04:01:42,191 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 04:01:42,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (1/1) ... [2022-11-03 04:01:42,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 04:01:42,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:42,228 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 04:01:42,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 04:01:42,278 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2022-11-03 04:01:42,278 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2022-11-03 04:01:42,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 04:01:42,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 04:01:42,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 04:01:42,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 04:01:42,280 INFO L130 BoogieDeclarations]: Found specification of procedure sll_append [2022-11-03 04:01:42,280 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_append [2022-11-03 04:01:42,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 04:01:42,280 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 04:01:42,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 04:01:42,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 04:01:42,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 04:01:42,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 04:01:42,453 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 04:01:42,455 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 04:01:42,516 INFO L769 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2022-11-03 04:01:42,840 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 04:01:42,931 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 04:01:42,932 INFO L300 CfgBuilder]: Removed 9 assume(true) statements. [2022-11-03 04:01:42,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:42 BoogieIcfgContainer [2022-11-03 04:01:42,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 04:01:42,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 04:01:42,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 04:01:42,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 04:01:42,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:01:41" (1/3) ... [2022-11-03 04:01:42,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1d7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:42, skipping insertion in model container [2022-11-03 04:01:42,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:01:42" (2/3) ... [2022-11-03 04:01:42,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c1d7cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:01:42, skipping insertion in model container [2022-11-03 04:01:42,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:01:42" (3/3) ... [2022-11-03 04:01:42,951 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_of_sll_nondet_append-2.i [2022-11-03 04:01:42,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 04:01:42,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 04:01:43,055 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 04:01:43,073 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;@58315a9d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 04:01:43,074 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 04:01:43,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 32 states have (on average 1.59375) internal successors, (51), 34 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:01:43,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 04:01:43,093 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:43,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:01:43,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:43,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:43,102 INFO L85 PathProgramCache]: Analyzing trace with hash -465621160, now seen corresponding path program 1 times [2022-11-03 04:01:43,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:43,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067272426] [2022-11-03 04:01:43,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:43,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:43,588 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 04:01:43,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:43,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067272426] [2022-11-03 04:01:43,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067272426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:43,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:01:43,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-03 04:01:43,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743104665] [2022-11-03 04:01:43,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:43,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 04:01:43,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 04:01:43,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:01:43,665 INFO L87 Difference]: Start difference. First operand has 39 states, 32 states have (on average 1.59375) internal successors, (51), 34 states have internal predecessors, (51), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:01:43,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:43,791 INFO L93 Difference]: Finished difference Result 83 states and 126 transitions. [2022-11-03 04:01:43,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 04:01:43,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-03 04:01:43,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:43,805 INFO L225 Difference]: With dead ends: 83 [2022-11-03 04:01:43,805 INFO L226 Difference]: Without dead ends: 37 [2022-11-03 04:01:43,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 04:01:43,813 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:43,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 74 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:01:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-11-03 04:01:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-11-03 04:01:43,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:01:43,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-11-03 04:01:43,867 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 14 [2022-11-03 04:01:43,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:43,868 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-11-03 04:01:43,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:01:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-11-03 04:01:43,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-03 04:01:43,872 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:43,872 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 04:01:43,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 04:01:43,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash 606018429, now seen corresponding path program 1 times [2022-11-03 04:01:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:43,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542162374] [2022-11-03 04:01:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:43,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:44,194 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:44,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542162374] [2022-11-03 04:01:44,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542162374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:44,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553483739] [2022-11-03 04:01:44,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:44,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:44,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:44,202 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:44,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 04:01:44,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:44,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:44,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:44,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:44,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 04:01:44,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553483739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:44,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [508781325] [2022-11-03 04:01:44,537 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-03 04:01:44,537 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:44,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:44,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:44,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:44,632 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 04:01:44,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 04:01:44,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:44,700 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:01:44,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 04:01:45,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:45,255 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:45,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:45,292 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 37 treesize of output 17 [2022-11-03 04:01:45,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:45,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:45,311 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 37 treesize of output 17 [2022-11-03 04:01:45,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:45,345 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 41 treesize of output 21 [2022-11-03 04:01:45,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:45,420 INFO L356 Elim1Store]: treesize reduction 62, result has 36.1 percent of original size [2022-11-03 04:01:45,421 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 35 treesize of output 51 [2022-11-03 04:01:45,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:45,478 INFO L356 Elim1Store]: treesize reduction 80, result has 17.5 percent of original size [2022-11-03 04:01:45,479 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 35 treesize of output 33 [2022-11-03 04:01:45,514 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 04:01:45,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 04:01:45,645 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 30 for LOIs [2022-11-03 04:01:45,707 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:46,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [508781325] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:46,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:01:46,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7, 3, 4] total 18 [2022-11-03 04:01:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234658729] [2022-11-03 04:01:46,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:46,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-03 04:01:46,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-03 04:01:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:01:46,200 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:01:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:46,527 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2022-11-03 04:01:46,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-03 04:01:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-11-03 04:01:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:46,529 INFO L225 Difference]: With dead ends: 60 [2022-11-03 04:01:46,529 INFO L226 Difference]: Without dead ends: 43 [2022-11-03 04:01:46,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-11-03 04:01:46,531 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:46,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 72 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-03 04:01:46,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-03 04:01:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2022-11-03 04:01:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 32 states have (on average 1.34375) internal successors, (43), 31 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:01:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2022-11-03 04:01:46,540 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 18 [2022-11-03 04:01:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:46,541 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2022-11-03 04:01:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:01:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2022-11-03 04:01:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-03 04:01:46,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:46,542 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 04:01:46,573 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-03 04:01:46,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:46,759 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:46,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1288661123, now seen corresponding path program 1 times [2022-11-03 04:01:46,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:46,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699449075] [2022-11-03 04:01:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:46,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:46,949 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:46,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699449075] [2022-11-03 04:01:46,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699449075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:46,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134886547] [2022-11-03 04:01:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:46,956 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:46,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 04:01:47,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:47,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:47,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:47,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:47,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:47,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134886547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:47,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2112449697] [2022-11-03 04:01:47,173 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2022-11-03 04:01:47,173 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:47,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:47,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:47,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:47,209 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 04:01:47,210 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 04:01:47,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:47,242 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:01:47,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 04:01:47,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:47,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:47,539 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 04:01:47,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 04:01:47,567 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:01:47,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 04:01:47,592 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 04:01:47,610 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 1 [2022-11-03 04:01:47,618 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 04:01:47,659 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-03 04:01:47,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:01:47,707 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:01:47,707 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-03 04:01:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:47,814 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:47,815 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 210 treesize of output 209 [2022-11-03 04:01:47,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:47,843 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 04:01:47,843 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 226 treesize of output 225 [2022-11-03 04:01:47,881 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:48,016 INFO L356 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2022-11-03 04:01:48,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 251 [2022-11-03 04:01:48,114 INFO L356 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2022-11-03 04:01:48,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 252 treesize of output 270 [2022-11-03 04:01:48,201 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 04:01:48,210 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 04:01:48,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:48,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:48,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:48,256 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 04:01:48,262 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 04:01:48,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:48,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:48,309 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 37 treesize of output 17 [2022-11-03 04:01:48,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:48,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:48,378 INFO L356 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2022-11-03 04:01:48,378 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 131 treesize of output 130 [2022-11-03 04:01:48,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:48,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-03 04:01:48,486 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 04:01:48,486 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 04:01:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:48,556 INFO L356 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-03 04:01:48,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 65 [2022-11-03 04:01:48,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:48,659 INFO L356 Elim1Store]: treesize reduction 142, result has 14.5 percent of original size [2022-11-03 04:01:48,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 145 treesize of output 146 [2022-11-03 04:01:49,093 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 30 for LOIs [2022-11-03 04:01:49,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:49,601 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 04:01:49,609 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 04:01:49,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:49,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:49,656 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 04:01:49,666 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:49,674 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 04:01:49,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:49,799 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 41 treesize of output 21 [2022-11-03 04:01:49,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:49,847 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:49,847 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-11-03 04:01:49,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:49,883 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 37 treesize of output 17 [2022-11-03 04:01:49,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:49,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:50,010 INFO L356 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-03 04:01:50,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 04:01:50,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:50,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:50,076 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 04:01:50,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 04:01:50,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:50,139 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 04:01:50,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 04:01:50,231 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:01:52,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2112449697] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:01:52,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:01:52,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [4, 3, 4] total 20 [2022-11-03 04:01:52,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91871080] [2022-11-03 04:01:52,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:01:52,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 04:01:52,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:01:52,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 04:01:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:01:52,386 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:01:54,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:01:54,145 INFO L93 Difference]: Finished difference Result 79 states and 104 transitions. [2022-11-03 04:01:54,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:01:54,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-03 04:01:54,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:01:54,152 INFO L225 Difference]: With dead ends: 79 [2022-11-03 04:01:54,152 INFO L226 Difference]: Without dead ends: 69 [2022-11-03 04:01:54,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-11-03 04:01:54,156 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 46 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-03 04:01:54,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 150 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-03 04:01:54,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-03 04:01:54,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-11-03 04:01:54,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:01:54,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2022-11-03 04:01:54,181 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 21 [2022-11-03 04:01:54,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:01:54,181 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2022-11-03 04:01:54,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 13 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:01:54,181 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2022-11-03 04:01:54,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-03 04:01:54,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:01:54,183 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] [2022-11-03 04:01:54,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 04:01:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:54,404 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:01:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:01:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1217203073, now seen corresponding path program 1 times [2022-11-03 04:01:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:01:54,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277627160] [2022-11-03 04:01:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:01:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:54,591 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:01:54,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277627160] [2022-11-03 04:01:54,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277627160] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:01:54,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749599175] [2022-11-03 04:01:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:01:54,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:01:54,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:01:54,592 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:01:54,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 04:01:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:01:54,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-03 04:01:54,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:01:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:54,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:01:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 04:01:54,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749599175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:01:54,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1842442054] [2022-11-03 04:01:54,774 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 04:01:54,774 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:01:54,775 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:01:54,775 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:01:54,775 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:01:54,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:54,807 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:01:54,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 04:01:54,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:54,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:01:55,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:55,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:55,181 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 04:01:55,182 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 04:01:55,204 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:01:55,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 04:01:55,225 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 04:01:55,242 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 1 [2022-11-03 04:01:55,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:01:55,299 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:01:55,299 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-03 04:01:55,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:01:55,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:55,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:55,402 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:55,402 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 210 treesize of output 209 [2022-11-03 04:01:55,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:55,427 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 04:01:55,428 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 246 treesize of output 245 [2022-11-03 04:01:55,533 INFO L356 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2022-11-03 04:01:55,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 247 treesize of output 251 [2022-11-03 04:01:55,610 INFO L356 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2022-11-03 04:01:55,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 252 treesize of output 270 [2022-11-03 04:01:55,682 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 04:01:55,688 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 04:01:55,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:55,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:55,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:55,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:01:55,731 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 04:01:55,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:55,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:55,785 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 20 treesize of output 9 [2022-11-03 04:01:55,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:55,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:55,807 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 37 treesize of output 17 [2022-11-03 04:01:55,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:55,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:55,868 INFO L356 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2022-11-03 04:01:55,868 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 131 treesize of output 130 [2022-11-03 04:01:55,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,019 INFO L356 Elim1Store]: treesize reduction 142, result has 14.5 percent of original size [2022-11-03 04:01:56,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 316 treesize of output 317 [2022-11-03 04:01:56,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:56,142 INFO L356 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-03 04:01:56,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 65 [2022-11-03 04:01:56,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:56,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:01:56,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:01:56,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:01:56,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:01:57,044 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 30 for LOIs [2022-11-03 04:01:57,484 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 04:01:57,492 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 04:01:57,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:57,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:01:57,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:01:57,558 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 04:01:57,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:01:57,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:01:57,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,692 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 37 treesize of output 17 [2022-11-03 04:01:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,742 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:01:57,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-11-03 04:01:57,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,784 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 41 treesize of output 21 [2022-11-03 04:01:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:57,888 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 04:01:57,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 04:01:57,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:01:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:57,953 INFO L356 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-03 04:01:57,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 04:01:57,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:01:57,998 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 04:01:57,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 04:01:58,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:00,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '937#(and (= |ULTIMATE.start_sll_length_#in~head#1.base| |ULTIMATE.start_sll_length_~head#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| 0) (= |ULTIMATE.start_sll_length_#res#1| |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~ptr~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|) |ULTIMATE.start_main_~ptr~0#1.base|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (= |ULTIMATE.start_sll_length_#in~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (= |ULTIMATE.start_main_~min~0#1| |ULTIMATE.start_main_~i~0#1|) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| |ULTIMATE.start_sll_length_#in~head#1.offset|) (= |ULTIMATE.start_sll_length_#in~head#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:00,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:00,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:02:00,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 7 [2022-11-03 04:02:00,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952897605] [2022-11-03 04:02:00,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:00,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 04:02:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 04:02:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:02:00,559 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:02:00,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:00,661 INFO L93 Difference]: Finished difference Result 94 states and 121 transitions. [2022-11-03 04:02:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 04:02:00,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-03 04:02:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:00,663 INFO L225 Difference]: With dead ends: 94 [2022-11-03 04:02:00,663 INFO L226 Difference]: Without dead ends: 66 [2022-11-03 04:02:00,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-11-03 04:02:00,664 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 35 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:00,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 93 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:00,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-03 04:02:00,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-11-03 04:02:00,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 56 states have (on average 1.2857142857142858) internal successors, (72), 56 states have internal predecessors, (72), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-03 04:02:00,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2022-11-03 04:02:00,678 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 26 [2022-11-03 04:02:00,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:00,678 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2022-11-03 04:02:00,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.428571428571429) internal successors, (45), 7 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-03 04:02:00,678 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2022-11-03 04:02:00,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-03 04:02:00,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:00,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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 04:02:00,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:00,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 04:02:00,887 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:00,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1188418377, now seen corresponding path program 2 times [2022-11-03 04:02:00,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:00,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647898343] [2022-11-03 04:02:00,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:00,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:01,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:01,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647898343] [2022-11-03 04:02:01,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647898343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:01,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965842170] [2022-11-03 04:02:01,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:02:01,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:01,103 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:01,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 04:02:01,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-03 04:02:01,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-03 04:02:01,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:01,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:01,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:01,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965842170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:01,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1938829151] [2022-11-03 04:02:01,458 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 04:02:01,458 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:01,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:01,459 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:01,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:01,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:01,490 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:01,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 04:02:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:01,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:02:01,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:01,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:01,835 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:01,835 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 04:02:01,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 04:02:01,868 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 1 [2022-11-03 04:02:01,876 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 04:02:01,885 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 04:02:01,930 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:02:01,931 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-03 04:02:01,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:02:02,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:02,027 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:02,027 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 207 treesize of output 206 [2022-11-03 04:02:02,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:02,053 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:02,054 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 215 treesize of output 214 [2022-11-03 04:02:02,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:02,167 INFO L356 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2022-11-03 04:02:02,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 04:02:02,234 INFO L356 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2022-11-03 04:02:02,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 241 treesize of output 259 [2022-11-03 04:02:02,295 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 04:02:02,300 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 04:02:02,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:02,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:02,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:02,334 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 04:02:02,340 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 04:02:02,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:02,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:02,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:02,418 INFO L356 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2022-11-03 04:02:02,418 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 131 treesize of output 130 [2022-11-03 04:02:02,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:02,467 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 37 treesize of output 17 [2022-11-03 04:02:02,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:02,498 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 41 treesize of output 21 [2022-11-03 04:02:02,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:02,585 INFO L356 Elim1Store]: treesize reduction 142, result has 14.5 percent of original size [2022-11-03 04:02:02,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 145 treesize of output 146 [2022-11-03 04:02:02,655 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 04:02:02,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 04:02:02,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:02,748 INFO L356 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-03 04:02:02,748 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 65 [2022-11-03 04:02:03,002 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:03,005 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:03,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:03,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:03,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:03,285 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 30 for LOIs [2022-11-03 04:02:03,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:03,713 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 04:02:03,720 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 11 treesize of output 7 [2022-11-03 04:02:03,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:03,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:03,766 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 04:02:03,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:03,782 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 04:02:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:03,918 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:03,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-11-03 04:02:03,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:03,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:03,953 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 37 treesize of output 17 [2022-11-03 04:02:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:03,990 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 41 treesize of output 21 [2022-11-03 04:02:04,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:04,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:04,101 INFO L356 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-03 04:02:04,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 04:02:04,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:04,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:04,151 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 04:02:04,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 04:02:04,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:04,218 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 04:02:04,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 04:02:04,309 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:07,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1384#(and (= |ULTIMATE.start_sll_length_#in~head#1.base| |ULTIMATE.start_sll_length_~head#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| 0) (= |ULTIMATE.start_sll_length_#res#1| |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~ptr~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|) |ULTIMATE.start_main_~ptr~0#1.base|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (= |ULTIMATE.start_sll_length_#in~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (= |ULTIMATE.start_main_~min~0#1| |ULTIMATE.start_main_~i~0#1|) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| |ULTIMATE.start_sll_length_#in~head#1.offset|) (= |ULTIMATE.start_sll_length_#in~head#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:07,000 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:07,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:02:07,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-11-03 04:02:07,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353350001] [2022-11-03 04:02:07,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:07,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-03 04:02:07,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-03 04:02:07,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-11-03 04:02:07,002 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:02:07,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:07,258 INFO L93 Difference]: Finished difference Result 153 states and 200 transitions. [2022-11-03 04:02:07,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-03 04:02:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-03 04:02:07,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:07,262 INFO L225 Difference]: With dead ends: 153 [2022-11-03 04:02:07,263 INFO L226 Difference]: Without dead ends: 86 [2022-11-03 04:02:07,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2022-11-03 04:02:07,265 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 140 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:07,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 184 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-03 04:02:07,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-11-03 04:02:07,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 69 states have internal predecessors, (88), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 04:02:07,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 98 transitions. [2022-11-03 04:02:07,299 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 98 transitions. Word has length 34 [2022-11-03 04:02:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:07,299 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 98 transitions. [2022-11-03 04:02:07,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:02:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 98 transitions. [2022-11-03 04:02:07,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 04:02:07,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:07,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:07,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:07,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:07,518 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:07,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1103433851, now seen corresponding path program 3 times [2022-11-03 04:02:07,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:07,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83255275] [2022-11-03 04:02:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:07,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-03 04:02:07,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83255275] [2022-11-03 04:02:07,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83255275] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:07,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836573727] [2022-11-03 04:02:07,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-03 04:02:07,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:07,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:07,767 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:07,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-03 04:02:07,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-03 04:02:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-03 04:02:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:08,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:08,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836573727] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 04:02:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1544164761] [2022-11-03 04:02:08,270 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 04:02:08,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:08,270 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:08,270 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:08,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:08,303 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-03 04:02:08,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-11-03 04:02:08,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:08,329 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:08,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 04:02:08,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:08,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:08,649 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-03 04:02:08,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 04:02:08,670 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:08,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 04:02:08,690 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 04:02:08,697 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 04:02:08,705 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 1 [2022-11-03 04:02:08,740 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-03 04:02:08,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:02:08,779 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:02:08,779 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-03 04:02:08,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:08,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:08,874 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:08,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 209 [2022-11-03 04:02:08,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:08,899 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 04:02:08,899 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 246 treesize of output 245 [2022-11-03 04:02:09,001 INFO L356 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2022-11-03 04:02:09,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 243 [2022-11-03 04:02:09,084 INFO L356 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2022-11-03 04:02:09,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 244 treesize of output 262 [2022-11-03 04:02:09,142 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 04:02:09,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:09,153 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 04:02:09,162 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:09,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:09,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:09,184 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 04:02:09,189 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 04:02:09,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,224 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 20 treesize of output 9 [2022-11-03 04:02:09,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:09,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:09,306 INFO L356 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2022-11-03 04:02:09,307 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 131 treesize of output 130 [2022-11-03 04:02:09,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-11-03 04:02:09,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,473 INFO L356 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-03 04:02:09,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 65 [2022-11-03 04:02:09,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:09,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:09,566 INFO L356 Elim1Store]: treesize reduction 142, result has 14.5 percent of original size [2022-11-03 04:02:09,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 316 treesize of output 317 [2022-11-03 04:02:10,080 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:10,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:10,269 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:10,272 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:10,373 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 30 for LOIs [2022-11-03 04:02:10,748 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 04:02:10,754 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 04:02:10,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:10,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:10,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:10,805 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 04:02:10,812 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 04:02:10,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,935 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 37 treesize of output 17 [2022-11-03 04:02:10,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:10,975 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:10,975 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-11-03 04:02:11,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:11,024 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 41 treesize of output 21 [2022-11-03 04:02:11,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:11,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:11,124 INFO L356 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-03 04:02:11,125 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 04:02:11,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:11,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:11,167 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 04:02:11,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 04:02:11,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:11,222 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 04:02:11,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 04:02:11,308 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:13,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1954#(and (= |ULTIMATE.start_sll_length_#in~head#1.base| |ULTIMATE.start_sll_length_~head#1.base|) (= |ULTIMATE.start_sll_length_~len~0#1| 0) (= |ULTIMATE.start_sll_length_#res#1| |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start_sll_length_~head#1.base| 0) (= |ULTIMATE.start_main_~ptr~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#head~1#1.base|) |ULTIMATE.start_main_~#head~1#1.offset|) |ULTIMATE.start_main_~ptr~0#1.base|) (or (not (= |ULTIMATE.start_main_~ptr~0#1.base| 0)) (not (= |ULTIMATE.start_main_~ptr~0#1.offset| 0))) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (= |ULTIMATE.start_sll_length_#in~head#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (= |ULTIMATE.start_main_~min~0#1| |ULTIMATE.start_main_~i~0#1|) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| |ULTIMATE.start_sll_length_#in~head#1.offset|) (= |ULTIMATE.start_sll_length_#in~head#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~ptr~0#1.base|) (+ |ULTIMATE.start_main_~ptr~0#1.offset| 4))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:13,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:13,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 04:02:13,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-11-03 04:02:13,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933927745] [2022-11-03 04:02:13,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:13,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-03 04:02:13,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-03 04:02:13,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-11-03 04:02:13,988 INFO L87 Difference]: Start difference. First operand 76 states and 98 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:02:14,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:14,246 INFO L93 Difference]: Finished difference Result 178 states and 233 transitions. [2022-11-03 04:02:14,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-03 04:02:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-03 04:02:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:14,250 INFO L225 Difference]: With dead ends: 178 [2022-11-03 04:02:14,250 INFO L226 Difference]: Without dead ends: 98 [2022-11-03 04:02:14,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=218, Invalid=1114, Unknown=0, NotChecked=0, Total=1332 [2022-11-03 04:02:14,252 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 227 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:14,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 163 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 04:02:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-11-03 04:02:14,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2022-11-03 04:02:14,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.2837837837837838) internal successors, (95), 75 states have internal predecessors, (95), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 04:02:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 105 transitions. [2022-11-03 04:02:14,268 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 105 transitions. Word has length 37 [2022-11-03 04:02:14,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:14,269 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 105 transitions. [2022-11-03 04:02:14,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:02:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 105 transitions. [2022-11-03 04:02:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-03 04:02:14,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:14,271 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:14,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:14,487 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:14,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash -934842871, now seen corresponding path program 4 times [2022-11-03 04:02:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:14,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120690755] [2022-11-03 04:02:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-03 04:02:15,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120690755] [2022-11-03 04:02:15,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120690755] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 04:02:15,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 04:02:15,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-03 04:02:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323400904] [2022-11-03 04:02:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 04:02:15,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-03 04:02:15,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-03 04:02:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-11-03 04:02:15,507 INFO L87 Difference]: Start difference. First operand 82 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:02:16,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:16,109 INFO L93 Difference]: Finished difference Result 185 states and 267 transitions. [2022-11-03 04:02:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 04:02:16,110 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-11-03 04:02:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:16,117 INFO L225 Difference]: With dead ends: 185 [2022-11-03 04:02:16,117 INFO L226 Difference]: Without dead ends: 172 [2022-11-03 04:02:16,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2022-11-03 04:02:16,122 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 81 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:16,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 304 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-03 04:02:16,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-03 04:02:16,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 113. [2022-11-03 04:02:16,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 103 states have (on average 1.3009708737864079) internal successors, (134), 105 states have internal predecessors, (134), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 04:02:16,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 148 transitions. [2022-11-03 04:02:16,172 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 148 transitions. Word has length 40 [2022-11-03 04:02:16,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:16,172 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 148 transitions. [2022-11-03 04:02:16,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-03 04:02:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 148 transitions. [2022-11-03 04:02:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-03 04:02:16,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:16,174 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 04:02:16,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 04:02:16,175 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:16,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:16,175 INFO L85 PathProgramCache]: Analyzing trace with hash -1225238671, now seen corresponding path program 1 times [2022-11-03 04:02:16,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:16,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250924264] [2022-11-03 04:02:16,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:16,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-03 04:02:18,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:18,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250924264] [2022-11-03 04:02:18,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250924264] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:18,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155764227] [2022-11-03 04:02:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:18,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:18,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:18,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:18,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-03 04:02:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:18,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 109 conjunts are in the unsatisfiable core [2022-11-03 04:02:18,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:18,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:18,407 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 04:02:18,893 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 04:02:19,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:19,017 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 16 treesize of output 17 [2022-11-03 04:02:19,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:19,045 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:19,046 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 43 treesize of output 42 [2022-11-03 04:02:19,229 INFO L356 Elim1Store]: treesize reduction 56, result has 45.1 percent of original size [2022-11-03 04:02:19,229 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 64 treesize of output 80 [2022-11-03 04:02:19,377 INFO L356 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2022-11-03 04:02:19,378 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-03 04:02:19,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:19,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:19,726 INFO L356 Elim1Store]: treesize reduction 33, result has 32.7 percent of original size [2022-11-03 04:02:19,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 113 [2022-11-03 04:02:20,040 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-11-03 04:02:20,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 34 [2022-11-03 04:02:20,148 INFO L356 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2022-11-03 04:02:20,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 38 [2022-11-03 04:02:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:20,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 04:02:21,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:21,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:21,042 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 2097 treesize of output 1945 [2022-11-03 04:02:21,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155764227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:21,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1510288927] [2022-11-03 04:02:21,410 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-03 04:02:21,410 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 04:02:21,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 04:02:21,411 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 04:02:21,411 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 04:02:21,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:21,444 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:21,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-11-03 04:02:21,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:21,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:02:21,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:21,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:21,744 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:21,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-03 04:02:21,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-03 04:02:21,772 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 04:02:21,781 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 1 [2022-11-03 04:02:21,788 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 04:02:21,830 INFO L356 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2022-11-03 04:02:21,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2022-11-03 04:02:21,871 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:02:21,871 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 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-03 04:02:21,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:21,966 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:21,967 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 207 treesize of output 206 [2022-11-03 04:02:21,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:21,991 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:21,992 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 215 treesize of output 214 [2022-11-03 04:02:22,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:22,111 INFO L356 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2022-11-03 04:02:22,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2022-11-03 04:02:22,190 INFO L356 Elim1Store]: treesize reduction 98, result has 26.9 percent of original size [2022-11-03 04:02:22,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 241 treesize of output 259 [2022-11-03 04:02:22,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:22,247 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 04:02:22,252 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 04:02:22,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:22,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:22,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:22,283 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 04:02:22,288 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 04:02:22,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:22,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:22,364 INFO L356 Elim1Store]: treesize reduction 65, result has 27.0 percent of original size [2022-11-03 04:02:22,364 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 131 treesize of output 130 [2022-11-03 04:02:22,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:22,408 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 41 treesize of output 21 [2022-11-03 04:02:22,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:22,437 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 37 treesize of output 17 [2022-11-03 04:02:22,477 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 04:02:22,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 15 [2022-11-03 04:02:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:22,531 INFO L356 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-03 04:02:22,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 65 [2022-11-03 04:02:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:22,606 INFO L356 Elim1Store]: treesize reduction 142, result has 14.5 percent of original size [2022-11-03 04:02:22,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 145 treesize of output 146 [2022-11-03 04:02:22,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:22,846 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:22,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:22,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:22,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 04:02:23,089 INFO L197 IcfgInterpreter]: Interpreting procedure sll_append with input of size 30 for LOIs [2022-11-03 04:02:23,467 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 04:02:23,475 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 04:02:23,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:23,497 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 04:02:23,507 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:23,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:02:23,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 04:02:23,545 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 04:02:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:23,641 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 41 treesize of output 21 [2022-11-03 04:02:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:23,684 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 04:02:23,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-11-03 04:02:23,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:23,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:23,730 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 37 treesize of output 17 [2022-11-03 04:02:23,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:23,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:23,858 INFO L356 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2022-11-03 04:02:23,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 42 treesize of output 43 [2022-11-03 04:02:23,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 04:02:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:23,898 INFO L356 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-03 04:02:23,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2022-11-03 04:02:23,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 04:02:23,967 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 04:02:23,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 11 [2022-11-03 04:02:24,045 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 04:02:28,376 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2966#(and (not (= |ULTIMATE.start_main_~count~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1))) (= |ULTIMATE.start_sll_length_#res#1| |ULTIMATE.start_main_~count~0#1|) (= |ULTIMATE.start_sll_length_~head#1.base| 0) (<= |ULTIMATE.start_sll_length_#res#1| 2147483647) (<= |ULTIMATE.start_main_~i~0#1| 3) (<= 0 |ULTIMATE.start_sll_length_~len~0#1|) (not (= 5 |ULTIMATE.start_main_~count~0#1|)) (= 5 |ULTIMATE.start_main_~max~0#1|) (= |ULTIMATE.start_main_~#head~1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#head~1#1.base|) (<= 3 |ULTIMATE.start_main_~i~0#1|) (= 3 |ULTIMATE.start_main_~min~0#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_sll_length_~head#1.offset| 0) (= |ULTIMATE.start_sll_length_~len~0#1| |ULTIMATE.start_sll_length_#res#1|) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |#StackHeapBarrier|) (not (= |ULTIMATE.start_main_~count~0#1| |ULTIMATE.start_main_~i~0#1|)) (= |#NULL.base| 0))' at error location [2022-11-03 04:02:28,376 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 04:02:28,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 04:02:28,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-03 04:02:28,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975666105] [2022-11-03 04:02:28,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 04:02:28,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-03 04:02:28,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 04:02:28,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-03 04:02:28,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2304, Unknown=0, NotChecked=0, Total=2450 [2022-11-03 04:02:28,379 INFO L87 Difference]: Start difference. First operand 113 states and 148 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:02:30,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 04:02:30,157 INFO L93 Difference]: Finished difference Result 176 states and 253 transitions. [2022-11-03 04:02:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-03 04:02:30,158 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-11-03 04:02:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 04:02:30,160 INFO L225 Difference]: With dead ends: 176 [2022-11-03 04:02:30,160 INFO L226 Difference]: Without dead ends: 151 [2022-11-03 04:02:30,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=233, Invalid=3799, Unknown=0, NotChecked=0, Total=4032 [2022-11-03 04:02:30,163 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 26 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 266 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-03 04:02:30,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 569 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 310 Invalid, 0 Unknown, 266 Unchecked, 0.3s Time] [2022-11-03 04:02:30,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-03 04:02:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2022-11-03 04:02:30,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 104 states have (on average 1.2980769230769231) internal successors, (135), 106 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-03 04:02:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 149 transitions. [2022-11-03 04:02:30,205 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 149 transitions. Word has length 41 [2022-11-03 04:02:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 04:02:30,206 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 149 transitions. [2022-11-03 04:02:30,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-03 04:02:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 149 transitions. [2022-11-03 04:02:30,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-03 04:02:30,210 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 04:02:30,210 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, 1, 1] [2022-11-03 04:02:30,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-03 04:02:30,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:30,426 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 04:02:30,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 04:02:30,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1637573879, now seen corresponding path program 2 times [2022-11-03 04:02:30,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 04:02:30,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227446384] [2022-11-03 04:02:30,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 04:02:30,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 04:02:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 04:02:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-03 04:02:33,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 04:02:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227446384] [2022-11-03 04:02:33,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227446384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 04:02:33,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501347908] [2022-11-03 04:02:33,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-03 04:02:33,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 04:02:33,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 04:02:33,148 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 04:02:33,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bc283928-7019-471f-9ec4-60dd0ed4b772/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-03 04:02:33,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-03 04:02:33,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-03 04:02:33,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 118 conjunts are in the unsatisfiable core [2022-11-03 04:02:33,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 04:02:33,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 04:02:33,562 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-03 04:02:33,562 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 04:02:33,682 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-03 04:02:33,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2022-11-03 04:02:33,792 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 11 treesize of output 7 [2022-11-03 04:02:34,064 INFO L356 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-03 04:02:34,064 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-11-03 04:02:34,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-03 04:02:34,252 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 04:02:34,253 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 55 [2022-11-03 04:02:34,276 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-03 04:02:34,277 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 29 treesize of output 29 [2022-11-03 04:02:34,653 INFO L356 Elim1Store]: treesize reduction 80, result has 60.8 percent of original size [2022-11-03 04:02:34,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 14 case distinctions, treesize of input 125 treesize of output 186 [2022-11-03 04:02:34,719 INFO L356 Elim1Store]: treesize reduction 108, result has 21.7 percent of original size [2022-11-03 04:02:34,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 46 [2022-11-03 04:02:39,330 INFO L356 Elim1Store]: treesize reduction 256, result has 59.8 percent of original size [2022-11-03 04:02:39,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 1 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 45 case distinctions, treesize of input 330 treesize of output 628