./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 6b4ec56b 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_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- 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-6b4ec56 [2022-11-20 19:46:22,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:46:22,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:46:22,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:46:22,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:46:22,165 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:46:22,167 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:46:22,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:46:22,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:46:22,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:46:22,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:46:22,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:46:22,173 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:46:22,174 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:46:22,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:46:22,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:46:22,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:46:22,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:46:22,183 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:46:22,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:46:22,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:46:22,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:46:22,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:46:22,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:46:22,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:46:22,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:46:22,216 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:46:22,217 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:46:22,219 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:46:22,220 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:46:22,221 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:46:22,222 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:46:22,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:46:22,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:46:22,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:46:22,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:46:22,228 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:46:22,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:46:22,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:46:22,231 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:46:22,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:46:22,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-11-20 19:46:22,270 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:46:22,271 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:46:22,271 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:46:22,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:46:22,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:46:22,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:46:22,273 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:46:22,273 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:46:22,274 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:46:22,274 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:46:22,275 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:46:22,275 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:46:22,275 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:46:22,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:46:22,276 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:46:22,276 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:46:22,276 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:46:22,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:46:22,278 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 19:46:22,278 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 19:46:22,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:46:22,279 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:46:22,279 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 19:46:22,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:46:22,280 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:46:22,280 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:46:22,280 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 19:46:22,280 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 19:46:22,281 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:46:22,281 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 19:46:22,281 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:46:22,281 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:46:22,282 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:46:22,282 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:46:22,282 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:46:22,283 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:46:22,283 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:46:22,283 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:46:22,283 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:46:22,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:46:22,284 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:46:22,284 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_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-11-20 19:46:22,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:46:22,566 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:46:22,569 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:46:22,571 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:46:22,571 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:46:22,572 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-20 19:46:25,599 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:46:25,873 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:46:25,874 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-20 19:46:25,891 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/data/eeddf93d0/403148f7afe24cb4ad8849e1dc86fa53/FLAG4e724f531 [2022-11-20 19:46:25,914 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/data/eeddf93d0/403148f7afe24cb4ad8849e1dc86fa53 [2022-11-20 19:46:25,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:46:25,923 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:46:25,926 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:46:25,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:46:25,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:46:25,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:46:25" (1/1) ... [2022-11-20 19:46:25,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@65831e9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:25, skipping insertion in model container [2022-11-20 19:46:25,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:46:25" (1/1) ... [2022-11-20 19:46:25,940 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:46:25,997 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:46:26,262 WARN L237 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_061e058f-0513-4806-a97d-2340eae60fa2/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-20 19:46:26,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:46:26,302 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:46:26,335 WARN L237 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_061e058f-0513-4806-a97d-2340eae60fa2/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-20 19:46:26,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:46:26,404 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:46:26,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26 WrapperNode [2022-11-20 19:46:26,405 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:46:26,406 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:46:26,406 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:46:26,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:46:26,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,463 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2022-11-20 19:46:26,464 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:46:26,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:46:26,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:46:26,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:46:26,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,510 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,516 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:46:26,517 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:46:26,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:46:26,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:46:26,518 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (1/1) ... [2022-11-20 19:46:26,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:46:26,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:26,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:46:26,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:46:26,594 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-20 19:46:26,594 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-20 19:46:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 19:46:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:46:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:46:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 19:46:26,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 19:46:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-20 19:46:26,596 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-20 19:46:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:46:26,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-20 19:46:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-20 19:46:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-20 19:46:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:46:26,597 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-20 19:46:26,597 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-20 19:46:26,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:46:26,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:46:26,797 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:46:26,799 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:46:27,459 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:46:27,522 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:46:27,522 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-20 19:46:27,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:46:27 BoogieIcfgContainer [2022-11-20 19:46:27,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:46:27,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:46:27,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:46:27,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:46:27,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:46:25" (1/3) ... [2022-11-20 19:46:27,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380cef40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:46:27, skipping insertion in model container [2022-11-20 19:46:27,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:46:26" (2/3) ... [2022-11-20 19:46:27,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@380cef40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:46:27, skipping insertion in model container [2022-11-20 19:46:27,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:46:27" (3/3) ... [2022-11-20 19:46:27,534 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-11-20 19:46:27,553 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:46:27,554 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2022-11-20 19:46:27,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:46:27,609 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@41633195, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:46:27,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2022-11-20 19:46:27,614 INFO L276 IsEmpty]: Start isEmpty. Operand has 194 states, 91 states have (on average 2.340659340659341) internal successors, (213), 181 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-11-20 19:46:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 19:46:27,621 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:27,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 19:46:27,622 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:27,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:27,627 INFO L85 PathProgramCache]: Analyzing trace with hash 532615, now seen corresponding path program 1 times [2022-11-20 19:46:27,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:27,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266502752] [2022-11-20 19:46:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:27,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:27,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:27,789 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:27,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266502752] [2022-11-20 19:46:27,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266502752] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:27,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:27,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:46:27,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534572453] [2022-11-20 19:46:27,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:27,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 19:46:27,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:27,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 19:46:27,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:46:27,828 INFO L87 Difference]: Start difference. First operand has 194 states, 91 states have (on average 2.340659340659341) internal successors, (213), 181 states have internal predecessors, (213), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:28,030 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2022-11-20 19:46:28,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 19:46:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 19:46:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:28,051 INFO L225 Difference]: With dead ends: 193 [2022-11-20 19:46:28,051 INFO L226 Difference]: Without dead ends: 192 [2022-11-20 19:46:28,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 19:46:28,058 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:28,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 184 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:46:28,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-20 19:46:28,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-20 19:46:28,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 89 states have (on average 2.101123595505618) internal successors, (187), 179 states have internal predecessors, (187), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 213 transitions. [2022-11-20 19:46:28,133 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 213 transitions. Word has length 3 [2022-11-20 19:46:28,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:28,134 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 213 transitions. [2022-11-20 19:46:28,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 213 transitions. [2022-11-20 19:46:28,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 19:46:28,135 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:28,135 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 19:46:28,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:46:28,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:28,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash 16812538, now seen corresponding path program 1 times [2022-11-20 19:46:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:28,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131767228] [2022-11-20 19:46:28,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:28,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:28,286 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:28,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131767228] [2022-11-20 19:46:28,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131767228] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:28,287 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:28,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:46:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722238887] [2022-11-20 19:46:28,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:28,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:46:28,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:46:28,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:46:28,290 INFO L87 Difference]: Start difference. First operand 192 states and 213 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:28,470 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2022-11-20 19:46:28,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:46:28,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 19:46:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:28,474 INFO L225 Difference]: With dead ends: 190 [2022-11-20 19:46:28,476 INFO L226 Difference]: Without dead ends: 190 [2022-11-20 19:46:28,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:46:28,483 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 13 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:28,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:46:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-20 19:46:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-11-20 19:46:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 89 states have (on average 2.0786516853932584) internal successors, (185), 177 states have internal predecessors, (185), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:28,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 211 transitions. [2022-11-20 19:46:28,505 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 211 transitions. Word has length 4 [2022-11-20 19:46:28,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:28,505 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 211 transitions. [2022-11-20 19:46:28,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:28,506 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 211 transitions. [2022-11-20 19:46:28,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-20 19:46:28,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:28,507 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-20 19:46:28,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:46:28,507 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:28,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:28,509 INFO L85 PathProgramCache]: Analyzing trace with hash 16812539, now seen corresponding path program 1 times [2022-11-20 19:46:28,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:28,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408136831] [2022-11-20 19:46:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:28,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:28,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:28,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408136831] [2022-11-20 19:46:28,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408136831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:28,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:28,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 19:46:28,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580323711] [2022-11-20 19:46:28,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:28,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:46:28,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:28,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:46:28,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:46:28,689 INFO L87 Difference]: Start difference. First operand 190 states and 211 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:28,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:28,880 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2022-11-20 19:46:28,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:46:28,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-20 19:46:28,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:28,882 INFO L225 Difference]: With dead ends: 188 [2022-11-20 19:46:28,882 INFO L226 Difference]: Without dead ends: 188 [2022-11-20 19:46:28,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:46:28,890 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 11 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:28,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 291 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:46:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-20 19:46:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-20 19:46:28,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 89 states have (on average 2.056179775280899) internal successors, (183), 175 states have internal predecessors, (183), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:28,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2022-11-20 19:46:28,913 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 4 [2022-11-20 19:46:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:28,914 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2022-11-20 19:46:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2022-11-20 19:46:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:46:28,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:28,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:46:28,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:46:28,915 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:28,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:28,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1023004566, now seen corresponding path program 1 times [2022-11-20 19:46:28,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:28,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774319148] [2022-11-20 19:46:28,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:29,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:29,138 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:29,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774319148] [2022-11-20 19:46:29,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774319148] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:29,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:29,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 19:46:29,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268988688] [2022-11-20 19:46:29,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:29,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 19:46:29,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:29,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 19:46:29,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:46:29,140 INFO L87 Difference]: Start difference. First operand 188 states and 209 transitions. Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:29,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:29,474 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-11-20 19:46:29,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:29,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 19:46:29,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:29,476 INFO L225 Difference]: With dead ends: 183 [2022-11-20 19:46:29,476 INFO L226 Difference]: Without dead ends: 183 [2022-11-20 19:46:29,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:29,484 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 38 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:29,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 578 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:46:29,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-20 19:46:29,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-11-20 19:46:29,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 89 states have (on average 2.0) internal successors, (178), 170 states have internal predecessors, (178), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2022-11-20 19:46:29,508 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 6 [2022-11-20 19:46:29,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2022-11-20 19:46:29,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:29,509 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2022-11-20 19:46:29,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:46:29,539 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:29,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:46:29,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:46:29,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:29,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:29,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1023004565, now seen corresponding path program 1 times [2022-11-20 19:46:29,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:29,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781409572] [2022-11-20 19:46:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:29,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:29,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:29,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781409572] [2022-11-20 19:46:29,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781409572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:29,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:29,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:46:29,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819223633] [2022-11-20 19:46:29,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:29,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 19:46:29,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:29,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 19:46:29,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:46:29,852 INFO L87 Difference]: Start difference. First operand 183 states and 204 transitions. Second operand has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:30,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:30,196 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2022-11-20 19:46:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 19:46:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:30,197 INFO L225 Difference]: With dead ends: 178 [2022-11-20 19:46:30,198 INFO L226 Difference]: Without dead ends: 178 [2022-11-20 19:46:30,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-20 19:46:30,199 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 29 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:30,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 408 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 19:46:30,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-20 19:46:30,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-11-20 19:46:30,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 89 states have (on average 1.9438202247191012) internal successors, (173), 165 states have internal predecessors, (173), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2022-11-20 19:46:30,205 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 6 [2022-11-20 19:46:30,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:30,205 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2022-11-20 19:46:30,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2022-11-20 19:46:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:46:30,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:30,206 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:30,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:46:30,207 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:30,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1648370340, now seen corresponding path program 1 times [2022-11-20 19:46:30,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:30,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434638670] [2022-11-20 19:46:30,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:30,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:30,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434638670] [2022-11-20 19:46:30,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434638670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:30,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:30,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:46:30,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962990309] [2022-11-20 19:46:30,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:30,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:30,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:30,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:30,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:46:30,265 INFO L87 Difference]: Start difference. First operand 178 states and 199 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:30,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:30,458 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2022-11-20 19:46:30,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:46:30,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 19:46:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:30,460 INFO L225 Difference]: With dead ends: 177 [2022-11-20 19:46:30,460 INFO L226 Difference]: Without dead ends: 177 [2022-11-20 19:46:30,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:46:30,461 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 8 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:30,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 386 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:46:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-20 19:46:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-20 19:46:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 89 states have (on average 1.9325842696629214) internal successors, (172), 164 states have internal predecessors, (172), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-11-20 19:46:30,467 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 7 [2022-11-20 19:46:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:30,468 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-11-20 19:46:30,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-11-20 19:46:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 19:46:30,468 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:30,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:30,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 19:46:30,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:30,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1648370339, now seen corresponding path program 1 times [2022-11-20 19:46:30,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:30,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473290995] [2022-11-20 19:46:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:30,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:30,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473290995] [2022-11-20 19:46:30,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473290995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:30,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:30,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 19:46:30,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477825212] [2022-11-20 19:46:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:30,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 19:46:30,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 19:46:30,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 19:46:30,613 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:30,803 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2022-11-20 19:46:30,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 19:46:30,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 19:46:30,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:30,804 INFO L225 Difference]: With dead ends: 176 [2022-11-20 19:46:30,804 INFO L226 Difference]: Without dead ends: 176 [2022-11-20 19:46:30,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 19:46:30,805 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:30,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 392 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:46:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-20 19:46:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-20 19:46:30,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 89 states have (on average 1.9213483146067416) internal successors, (171), 163 states have internal predecessors, (171), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2022-11-20 19:46:30,810 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 7 [2022-11-20 19:46:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:30,810 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2022-11-20 19:46:30,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:46:30,813 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2022-11-20 19:46:30,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:46:30,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:30,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:30,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 19:46:30,814 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:30,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:30,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1889969027, now seen corresponding path program 1 times [2022-11-20 19:46:30,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:30,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465853694] [2022-11-20 19:46:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:31,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:31,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465853694] [2022-11-20 19:46:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465853694] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:31,115 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:31,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:46:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782670786] [2022-11-20 19:46:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:31,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:46:31,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:46:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:31,119 INFO L87 Difference]: Start difference. First operand 176 states and 197 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-20 19:46:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:31,532 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2022-11-20 19:46:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:31,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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 13 [2022-11-20 19:46:31,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:31,533 INFO L225 Difference]: With dead ends: 175 [2022-11-20 19:46:31,534 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 19:46:31,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:31,534 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 156 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:31,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 296 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:31,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 19:46:31,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-20 19:46:31,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 89 states have (on average 1.9101123595505618) internal successors, (170), 162 states have internal predecessors, (170), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:31,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2022-11-20 19:46:31,540 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 13 [2022-11-20 19:46:31,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:31,541 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2022-11-20 19:46:31,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 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) [2022-11-20 19:46:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2022-11-20 19:46:31,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:46:31,542 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:31,542 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:31,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 19:46:31,542 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:31,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1889969028, now seen corresponding path program 1 times [2022-11-20 19:46:31,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712721252] [2022-11-20 19:46:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:31,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:31,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:31,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712721252] [2022-11-20 19:46:31,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712721252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:31,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:31,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 19:46:31,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724193821] [2022-11-20 19:46:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:31,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:46:31,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:46:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:31,907 INFO L87 Difference]: Start difference. First operand 175 states and 196 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-20 19:46:32,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:32,314 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2022-11-20 19:46:32,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:46:32,315 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-11-20 19:46:32,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:32,318 INFO L225 Difference]: With dead ends: 175 [2022-11-20 19:46:32,318 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 19:46:32,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:46:32,319 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 207 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:32,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 197 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 19:46:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-11-20 19:46:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 89 states have (on average 1.898876404494382) internal successors, (169), 161 states have internal predecessors, (169), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2022-11-20 19:46:32,325 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 13 [2022-11-20 19:46:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:32,325 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2022-11-20 19:46:32,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-20 19:46:32,326 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2022-11-20 19:46:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:46:32,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:32,327 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:32,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 19:46:32,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:32,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1074212787, now seen corresponding path program 1 times [2022-11-20 19:46:32,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:32,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106548609] [2022-11-20 19:46:32,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:32,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:32,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:32,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106548609] [2022-11-20 19:46:32,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106548609] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:32,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:32,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 19:46:32,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781252576] [2022-11-20 19:46:32,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:32,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 19:46:32,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:32,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 19:46:32,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:46:32,630 INFO L87 Difference]: Start difference. First operand 174 states and 195 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-20 19:46:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:33,095 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2022-11-20 19:46:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 19:46:33,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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 17 [2022-11-20 19:46:33,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:33,097 INFO L225 Difference]: With dead ends: 173 [2022-11-20 19:46:33,097 INFO L226 Difference]: Without dead ends: 173 [2022-11-20 19:46:33,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:46:33,098 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 108 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:33,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 350 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-20 19:46:33,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-11-20 19:46:33,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 89 states have (on average 1.8876404494382022) internal successors, (168), 160 states have internal predecessors, (168), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2022-11-20 19:46:33,103 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 17 [2022-11-20 19:46:33,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:33,104 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2022-11-20 19:46:33,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-20 19:46:33,104 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2022-11-20 19:46:33,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 19:46:33,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:33,105 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:33,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 19:46:33,105 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:33,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1074212786, now seen corresponding path program 1 times [2022-11-20 19:46:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:33,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021389097] [2022-11-20 19:46:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:33,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:33,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:33,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021389097] [2022-11-20 19:46:33,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021389097] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:33,676 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:33,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-20 19:46:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405977928] [2022-11-20 19:46:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:33,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:46:33,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:33,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:46:33,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:33,678 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 8 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-20 19:46:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:34,111 INFO L93 Difference]: Finished difference Result 185 states and 212 transitions. [2022-11-20 19:46:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:46:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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 17 [2022-11-20 19:46:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:34,114 INFO L225 Difference]: With dead ends: 185 [2022-11-20 19:46:34,114 INFO L226 Difference]: Without dead ends: 185 [2022-11-20 19:46:34,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:34,115 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 93 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:34,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 255 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:34,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-20 19:46:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-20 19:46:34,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 97 states have (on average 1.8350515463917525) internal successors, (178), 168 states have internal predecessors, (178), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 19:46:34,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 206 transitions. [2022-11-20 19:46:34,121 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 206 transitions. Word has length 17 [2022-11-20 19:46:34,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:34,121 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 206 transitions. [2022-11-20 19:46:34,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 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) [2022-11-20 19:46:34,122 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 206 transitions. [2022-11-20 19:46:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-20 19:46:34,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:34,122 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:34,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 19:46:34,128 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:34,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:34,128 INFO L85 PathProgramCache]: Analyzing trace with hash -908910069, now seen corresponding path program 1 times [2022-11-20 19:46:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:34,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823465721] [2022-11-20 19:46:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:34,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:34,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 19:46:34,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:34,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823465721] [2022-11-20 19:46:34,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823465721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:34,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455469720] [2022-11-20 19:46:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:34,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:34,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:34,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:46:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:35,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-20 19:46:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:35,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2022-11-20 19:46:35,182 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:35,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-20 19:46:35,220 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:35,255 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_417 Int)) (= (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_417) |c_#length|)))) is different from true [2022-11-20 19:46:35,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 19:46:35,439 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:35,466 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_alloc_node_~ptr~0#1.base| Int)) (and (exists ((v_ArrVal_418 Int)) (= |c_#length| (store |c_old(#length)| |chain_node_alloc_node_~ptr~0#1.base| v_ArrVal_418))) (< |chain_node_alloc_node_~ptr~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-20 19:46:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-20 19:46:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-20 19:46:35,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:35,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455469720] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:35,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [555371014] [2022-11-20 19:46:35,735 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-20 19:46:35,736 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:35,740 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:35,746 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:35,747 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:35,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-20 19:46:35,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:35,936 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:46:35,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:46:35,965 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:35,970 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:35,980 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:35,985 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:35,991 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:36,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 19:46:36,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:46:36,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:46:36,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,085 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-20 19:46:36,085 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 42 [2022-11-20 19:46:36,105 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:36,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,151 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-20 19:46:36,152 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 42 [2022-11-20 19:46:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,251 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-20 19:46:36,251 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 56 [2022-11-20 19:46:36,267 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:36,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,343 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-20 19:46:36,343 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 74 [2022-11-20 19:46:36,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 19:46:36,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:36,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:36,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,600 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:46:36,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:46:36,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 19:46:36,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:36,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:36,778 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:36,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:46:36,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:46:36,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:36,948 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:46:36,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:46:37,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 19:46:37,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 19:46:37,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,037 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 19:46:37,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,052 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:37,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,168 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:46:37,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:46:37,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 19:46:37,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,231 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-20 19:46:37,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,247 INFO L350 Elim1Store]: Elim1 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 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-20 19:46:37,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:37,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 3 [2022-11-20 19:46:37,490 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-20 19:46:37,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-11-20 19:46:37,915 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:37,919 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:38,080 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-20 19:46:38,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-11-20 19:46:38,518 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:38,520 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:38,718 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-20 19:46:38,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-11-20 19:46:39,170 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:39,173 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:39,175 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:39,363 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-20 19:46:39,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-11-20 19:46:39,750 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:39,754 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-20 19:46:40,045 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-20 19:46:40,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 259 treesize of output 248 [2022-11-20 19:46:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,444 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:46:40,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:46:40,463 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-20 19:46:40,473 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,479 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,489 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,495 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,502 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 19:46:40,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:46:40,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:46:40,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:40,587 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-20 19:46:40,587 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 38 [2022-11-20 19:46:40,603 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:40,638 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-20 19:46:40,638 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 38 [2022-11-20 19:46:40,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:40,679 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-20 19:46:40,679 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 44 treesize of output 42 [2022-11-20 19:46:40,691 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:40,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:40,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 19:46:40,716 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-20 19:46:40,717 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 44 treesize of output 38 [2022-11-20 19:46:40,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:46:43,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4354#(and (<= 0 |ULTIMATE.start_create_sll_~#list~0#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp1#1.offset|) (<= 0 |ULTIMATE.start_create_sll_~pp2#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp1#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_sll_~#list~0#1.base|) |ULTIMATE.start_create_sll_~#list~0#1.offset|) |ULTIMATE.start_create_sll_#t~mem9#1.offset|) (<= |ULTIMATE.start_create_sll_#in~pp1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#p2~0#1.base|) (= |ULTIMATE.start_main_~#p1~0#1.offset| 0) (<= 0 |ULTIMATE.start_create_sll_#in~pp2#1.base|) (= |ULTIMATE.start_main_~#p2~0#1.offset| 0) (<= 0 |ULTIMATE.start_create_sll_#in~pp2#1.offset|) (< (select |#length| |ULTIMATE.start_create_sll_~pp1#1.base|) (+ |ULTIMATE.start_create_sll_~pp1#1.offset| 4)) (= |ULTIMATE.start_create_sll_~#list~0#1.offset| 0) (<= |ULTIMATE.start_create_sll_~pp1#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#p1~0#1.base|) (= (select |#valid| |ULTIMATE.start_create_sll_~#list~0#1.base|) 1) (= |#NULL.offset| 0) (<= |ULTIMATE.start_create_sll_#in~pp2#1.offset| 0) (<= 0 |ULTIMATE.start_create_sll_#in~pp1#1.base|) (<= 0 |ULTIMATE.start_create_sll_#in~pp1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_sll_~#list~0#1.base|) |ULTIMATE.start_create_sll_~#list~0#1.offset|) |ULTIMATE.start_create_sll_#t~mem9#1.base|) (<= 0 |ULTIMATE.start_create_sll_~pp2#1.offset|) (<= 0 |#StackHeapBarrier|) (<= (+ |ULTIMATE.start_create_sll_~#list~0#1.offset| 4) (select |#length| |ULTIMATE.start_create_sll_~#list~0#1.base|)) (<= |ULTIMATE.start_create_sll_~pp2#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-20 19:46:43,593 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:46:43,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:46:43,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2022-11-20 19:46:43,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741371183] [2022-11-20 19:46:43,594 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:46:43,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-20 19:46:43,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:43,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-20 19:46:43,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=713, Unknown=2, NotChecked=110, Total=930 [2022-11-20 19:46:43,595 INFO L87 Difference]: Start difference. First operand 182 states and 206 transitions. Second operand has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 19:46:44,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:44,275 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-20 19:46:44,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:46:44,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-11-20 19:46:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:44,282 INFO L225 Difference]: With dead ends: 181 [2022-11-20 19:46:44,282 INFO L226 Difference]: Without dead ends: 181 [2022-11-20 19:46:44,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=113, Invalid=763, Unknown=2, NotChecked=114, Total=992 [2022-11-20 19:46:44,284 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 325 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:44,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 129 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 599 Invalid, 0 Unknown, 374 Unchecked, 0.6s Time] [2022-11-20 19:46:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-20 19:46:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2022-11-20 19:46:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 89 states have (on average 1.8764044943820224) internal successors, (167), 159 states have internal predecessors, (167), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:44,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-11-20 19:46:44,293 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 27 [2022-11-20 19:46:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:44,293 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-11-20 19:46:44,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-20 19:46:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-11-20 19:46:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 19:46:44,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:44,295 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:44,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 19:46:44,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-20 19:46:44,502 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508004, now seen corresponding path program 1 times [2022-11-20 19:46:44,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:44,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173069139] [2022-11-20 19:46:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:44,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:44,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:44,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:44,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173069139] [2022-11-20 19:46:44,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173069139] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:44,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:44,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 19:46:44,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771287530] [2022-11-20 19:46:44,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:44,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:46:44,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:44,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:46:44,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:44,904 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-11-20 19:46:45,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:45,377 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2022-11-20 19:46:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:46:45,378 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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 30 [2022-11-20 19:46:45,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:45,379 INFO L225 Difference]: With dead ends: 175 [2022-11-20 19:46:45,379 INFO L226 Difference]: Without dead ends: 175 [2022-11-20 19:46:45,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:46:45,380 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 175 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:45,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 264 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:45,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-20 19:46:45,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-11-20 19:46:45,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 89 states have (on average 1.797752808988764) internal successors, (160), 152 states have internal predecessors, (160), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-20 19:46:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-11-20 19:46:45,388 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 30 [2022-11-20 19:46:45,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:45,390 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-11-20 19:46:45,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-11-20 19:46:45,390 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-11-20 19:46:45,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-20 19:46:45,393 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:45,394 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:45,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-20 19:46:45,394 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:45,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:45,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508005, now seen corresponding path program 1 times [2022-11-20 19:46:45,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:45,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374759918] [2022-11-20 19:46:45,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:45,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:45,735 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:45,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374759918] [2022-11-20 19:46:45,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374759918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:45,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:45,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 19:46:45,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054405481] [2022-11-20 19:46:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:45,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:46:45,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:45,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:46:45,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:45,738 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-11-20 19:46:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:46,232 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2022-11-20 19:46:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:46:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 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 30 [2022-11-20 19:46:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:46,233 INFO L225 Difference]: With dead ends: 187 [2022-11-20 19:46:46,233 INFO L226 Difference]: Without dead ends: 187 [2022-11-20 19:46:46,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:46:46,234 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 371 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:46,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 151 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:46,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-20 19:46:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 165. [2022-11-20 19:46:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 94 states have (on average 1.702127659574468) internal successors, (160), 151 states have internal predecessors, (160), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 19:46:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-11-20 19:46:46,239 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 30 [2022-11-20 19:46:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:46,239 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-11-20 19:46:46,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.333333333333333) internal successors, (26), 7 states have internal predecessors, (26), 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) [2022-11-20 19:46:46,240 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-11-20 19:46:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 19:46:46,240 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:46,240 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:46,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-20 19:46:46,240 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:46,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:46,241 INFO L85 PathProgramCache]: Analyzing trace with hash 308140793, now seen corresponding path program 1 times [2022-11-20 19:46:46,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:46,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590686509] [2022-11-20 19:46:46,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:46,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:46,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:46,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:46,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590686509] [2022-11-20 19:46:46,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590686509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:46,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:46,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 19:46:46,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942857610] [2022-11-20 19:46:46,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:46,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:46:46,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:46,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:46:46,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:46,527 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-20 19:46:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:46,962 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-11-20 19:46:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:46:46,962 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 31 [2022-11-20 19:46:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:46,963 INFO L225 Difference]: With dead ends: 168 [2022-11-20 19:46:46,963 INFO L226 Difference]: Without dead ends: 168 [2022-11-20 19:46:46,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-20 19:46:46,964 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 198 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:46,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 189 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 19:46:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-20 19:46:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2022-11-20 19:46:46,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 94 states have (on average 1.627659574468085) internal successors, (153), 144 states have internal predecessors, (153), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-20 19:46:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2022-11-20 19:46:46,969 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 31 [2022-11-20 19:46:46,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:46,969 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2022-11-20 19:46:46,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-20 19:46:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2022-11-20 19:46:46,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 19:46:46,970 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:46,970 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:46,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-20 19:46:46,971 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:46,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:46,971 INFO L85 PathProgramCache]: Analyzing trace with hash 308140794, now seen corresponding path program 1 times [2022-11-20 19:46:46,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:46,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597065532] [2022-11-20 19:46:46,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:46,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:47,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:47,278 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:47,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597065532] [2022-11-20 19:46:47,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597065532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:46:47,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:46:47,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 19:46:47,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060367721] [2022-11-20 19:46:47,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:46:47,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 19:46:47,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:46:47,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 19:46:47,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-20 19:46:47,281 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-20 19:46:47,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:46:47,896 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2022-11-20 19:46:47,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 19:46:47,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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 31 [2022-11-20 19:46:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:46:47,898 INFO L225 Difference]: With dead ends: 187 [2022-11-20 19:46:47,898 INFO L226 Difference]: Without dead ends: 187 [2022-11-20 19:46:47,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-20 19:46:47,899 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 271 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 19:46:47,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 186 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-20 19:46:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-20 19:46:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 163. [2022-11-20 19:46:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 104 states have (on average 1.5288461538461537) internal successors, (159), 147 states have internal predecessors, (159), 19 states have call successors, (19), 4 states have call predecessors, (19), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-20 19:46:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2022-11-20 19:46:47,906 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 31 [2022-11-20 19:46:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:46:47,906 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2022-11-20 19:46:47,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 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) [2022-11-20 19:46:47,907 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2022-11-20 19:46:47,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-20 19:46:47,907 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:46:47,908 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:46:47,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-20 19:46:47,908 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:46:47,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:46:47,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1565693152, now seen corresponding path program 1 times [2022-11-20 19:46:47,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:46:47,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444747685] [2022-11-20 19:46:47,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:47,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:46:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:49,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:46:49,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:46:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444747685] [2022-11-20 19:46:49,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444747685] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:49,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064927363] [2022-11-20 19:46:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:46:49,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:46:49,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:46:49,279 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:46:49,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:46:49,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:46:49,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-20 19:46:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:46:49,578 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:49,779 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:46:49,780 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 21 [2022-11-20 19:46:49,787 INFO L350 Elim1Store]: Elim1 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 6 treesize of output 4 [2022-11-20 19:46:49,978 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:46:49,978 INFO L350 Elim1Store]: Elim1 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 28 treesize of output 23 [2022-11-20 19:46:50,041 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:50,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2022-11-20 19:46:50,289 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_874 (Array Int Int)) (v_ArrVal_873 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_873) |c_chain_node_#in~ppnode#1.base| v_ArrVal_874) |c_#memory_$Pointer$.base|))) is different from true [2022-11-20 19:46:50,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,333 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-20 19:46:50,333 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 33 treesize of output 49 [2022-11-20 19:46:50,375 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 20 [2022-11-20 19:46:50,475 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:50,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 20 [2022-11-20 19:46:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 19:46:50,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:46:50,760 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 19:46:50,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 15 [2022-11-20 19:46:50,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064927363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:46:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2098229645] [2022-11-20 19:46:50,930 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-20 19:46:50,930 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:46:50,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:46:50,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:46:50,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:46:50,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:50,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-20 19:46:51,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,063 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:46:51,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:46:51,083 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,089 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,103 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,108 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,113 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:46:51,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:46:51,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 19:46:51,167 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,202 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-20 19:46:51,202 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 42 [2022-11-20 19:46:51,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,240 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-20 19:46:51,240 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 42 [2022-11-20 19:46:51,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,324 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-20 19:46:51,325 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 74 [2022-11-20 19:46:51,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,394 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-20 19:46:51,395 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 56 [2022-11-20 19:46:51,410 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 19:46:51,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:51,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:51,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,550 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:46:51,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:46:51,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 19:46:51,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:51,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:46:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:46:51,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:46:51,720 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 25 [2022-11-20 19:46:51,806 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:51,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 25 [2022-11-20 19:46:51,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,901 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:46:51,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:46:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:46:51,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:51,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 19:46:52,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:46:52,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 19:46:52,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,091 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:46:52,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:46:52,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 19:46:52,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:46:52,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:46:52,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 19:46:52,247 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:46:52,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,417 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-20 19:46:52,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 35 [2022-11-20 19:46:52,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,499 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:46:52,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:46:52,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:46:52,580 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:46:52,580 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:46:52,612 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 140 for LOIs [2022-11-20 19:46:53,608 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-11-20 19:46:53,679 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 60 for LOIs [2022-11-20 19:46:53,695 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:47:09,560 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification. DAG size of input: 235 DAG size of output: 210 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:47:15,521 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6316#(and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_33| Int)) (and (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_33|) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_33|) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_33|)) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_33|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_33|) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_33| 0)))) (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16| 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18| 2)) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16| 2)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18|) 0) 0) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_16|) 1) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18|) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_18|)))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:47:15,521 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:47:15,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:47:15,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 35 [2022-11-20 19:47:15,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683102349] [2022-11-20 19:47:15,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:47:15,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 19:47:15,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:47:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 19:47:15,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3299, Unknown=10, NotChecked=116, Total=3660 [2022-11-20 19:47:15,525 INFO L87 Difference]: Start difference. First operand 163 states and 189 transitions. Second operand has 35 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 31 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 19:47:17,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:47:17,815 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2022-11-20 19:47:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 19:47:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 31 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-20 19:47:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:47:17,817 INFO L225 Difference]: With dead ends: 187 [2022-11-20 19:47:17,817 INFO L226 Difference]: Without dead ends: 187 [2022-11-20 19:47:17,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=358, Invalid=4886, Unknown=16, NotChecked=142, Total=5402 [2022-11-20 19:47:17,820 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 229 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 1819 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 19:47:17,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 1618 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1819 Invalid, 0 Unknown, 565 Unchecked, 1.4s Time] [2022-11-20 19:47:17,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-20 19:47:17,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2022-11-20 19:47:17,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 114 states have (on average 1.543859649122807) internal successors, (176), 158 states have internal predecessors, (176), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 19:47:17,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2022-11-20 19:47:17,827 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 36 [2022-11-20 19:47:17,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:47:17,827 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2022-11-20 19:47:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 31 states have internal predecessors, (51), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 19:47:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2022-11-20 19:47:17,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 19:47:17,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:47:17,829 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:47:17,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-20 19:47:18,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 19:47:18,034 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:47:18,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:47:18,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1403489686, now seen corresponding path program 1 times [2022-11-20 19:47:18,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:47:18,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410679851] [2022-11-20 19:47:18,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:18,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:47:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:47:21,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:47:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410679851] [2022-11-20 19:47:21,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410679851] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:47:21,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112215912] [2022-11-20 19:47:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:21,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:21,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:47:21,374 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:47:21,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 19:47:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:21,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 19:47:21,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:47:21,771 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:22,028 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:47:22,029 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 19 [2022-11-20 19:47:22,239 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-20 19:47:22,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 29 [2022-11-20 19:47:22,372 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-20 19:47:22,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 11 [2022-11-20 19:47:22,730 WARN L859 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_1043 (Array Int Int)) (v_ArrVal_1042 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1042) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1043)))) is different from true [2022-11-20 19:47:22,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:22,801 INFO L321 Elim1Store]: treesize reduction 51, result has 48.0 percent of original size [2022-11-20 19:47:22,802 INFO L350 Elim1Store]: Elim1 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 6 case distinctions, treesize of input 40 treesize of output 72 [2022-11-20 19:47:22,834 INFO L350 Elim1Store]: Elim1 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 21 treesize of output 15 [2022-11-20 19:47:22,849 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 10 [2022-11-20 19:47:22,937 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-11-20 19:47:23,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-20 19:47:23,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:47:23,251 INFO L350 Elim1Store]: Elim1 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 10 treesize of output 8 [2022-11-20 19:47:23,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112215912] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:47:23,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [641559202] [2022-11-20 19:47:23,517 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-20 19:47:23,518 INFO L166 IcfgInterpreter]: Building call graph [2022-11-20 19:47:23,518 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-20 19:47:23,518 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-20 19:47:23,518 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-20 19:47:23,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-11-20 19:47:23,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,633 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:47:23,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:47:23,651 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,655 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,661 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,665 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,669 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:47:23,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-20 19:47:23,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 19:47:23,709 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,744 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-20 19:47:23,745 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 42 [2022-11-20 19:47:23,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,783 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-20 19:47:23,783 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 32 treesize of output 42 [2022-11-20 19:47:23,802 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:23,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,845 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-20 19:47:23,845 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 56 [2022-11-20 19:47:23,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,916 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-20 19:47:23,917 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 74 [2022-11-20 19:47:23,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:47:23,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:47:23,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:23,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 19:47:24,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,066 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:47:24,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:47:24,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:47:24,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-20 19:47:24,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 16 [2022-11-20 19:47:24,204 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:24,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:47:24,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:47:24,302 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:24,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 25 [2022-11-20 19:47:24,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 25 [2022-11-20 19:47:24,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,416 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:47:24,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:47:24,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 19:47:24,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 19:47:24,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:47:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:47:24,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,604 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:47:24,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:47:24,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-20 19:47:24,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:47:24,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2022-11-20 19:47:24,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-20 19:47:24,759 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:24,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,915 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-20 19:47:24,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 11 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 35 [2022-11-20 19:47:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:24,995 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-20 19:47:24,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 43 [2022-11-20 19:47:25,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:25,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:25,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:25,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:25,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:25,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:25,080 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-20 19:47:25,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 12 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 55 treesize of output 61 [2022-11-20 19:47:25,099 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 141 for LOIs [2022-11-20 19:47:26,013 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-11-20 19:47:26,116 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 75 for LOIs [2022-11-20 19:47:26,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-20 19:47:43,253 WARN L233 SmtUtils]: Spent 6.09s on a formula simplification. DAG size of input: 236 DAG size of output: 209 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-20 19:47:50,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6926#(and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_37| Int)) (and (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~#list~0#1.base_37|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_37|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_37| 0)) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_37|)) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_37|) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_37|) 0))) (= |#NULL.offset| 0) (or (exists ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| Int)) (and (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| Int)) (and (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) 1) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| 2)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) 0) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| 0)))) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 0)))) (exists ((|v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| Int)) (and (exists ((|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| Int)) (and (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) 1) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| 2)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) (not (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25|) 0))) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_25| 0)))) (= (select |#valid| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 2)) (<= 0 |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24|) (not (= |v_ULTIMATE.start_create_sll_~pp2#1.base_BEFORE_CALL_24| 0))))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-20 19:47:50,066 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-20 19:47:50,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 19:47:50,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2022-11-20 19:47:50,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076046703] [2022-11-20 19:47:50,067 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 19:47:50,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 19:47:50,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:47:50,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 19:47:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4393, Unknown=33, NotChecked=134, Total=4830 [2022-11-20 19:47:50,070 INFO L87 Difference]: Start difference. First operand 175 states and 208 transitions. Second operand has 43 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 19:47:54,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:47:54,864 INFO L93 Difference]: Finished difference Result 222 states and 262 transitions. [2022-11-20 19:47:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 19:47:54,865 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 38 [2022-11-20 19:47:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:47:54,866 INFO L225 Difference]: With dead ends: 222 [2022-11-20 19:47:54,866 INFO L226 Difference]: Without dead ends: 222 [2022-11-20 19:47:54,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 29.1s TimeCoverageRelationStatistics Valid=494, Invalid=8026, Unknown=40, NotChecked=182, Total=8742 [2022-11-20 19:47:54,869 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 307 mSDsluCounter, 1976 mSDsCounter, 0 mSdLazyCounter, 2397 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 2069 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 784 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-20 19:47:54,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 2069 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2397 Invalid, 0 Unknown, 784 Unchecked, 2.0s Time] [2022-11-20 19:47:54,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-20 19:47:54,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 175. [2022-11-20 19:47:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 114 states have (on average 1.5350877192982457) internal successors, (175), 158 states have internal predecessors, (175), 20 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-20 19:47:54,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-11-20 19:47:54,876 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 38 [2022-11-20 19:47:54,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:47:54,876 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-11-20 19:47:54,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 33 states have (on average 1.8484848484848484) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 19:47:54,877 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-11-20 19:47:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-20 19:47:54,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:47:54,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:47:54,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 19:47:55,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 19:47:55,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, check_seq_nextErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 80 more)] === [2022-11-20 19:47:55,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:47:55,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1403500622, now seen corresponding path program 1 times [2022-11-20 19:47:55,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:47:55,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515663469] [2022-11-20 19:47:55,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:47:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:47:56,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:47:56,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515663469] [2022-11-20 19:47:56,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515663469] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:47:56,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012611257] [2022-11-20 19:47:56,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:47:56,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:47:56,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:47:56,920 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:47:56,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_061e058f-0513-4806-a97d-2340eae60fa2/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 19:47:57,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:47:57,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-20 19:47:57,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:47:57,172 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-20 19:47:57,172 INFO L350 Elim1Store]: Elim1 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 2 case distinctions, treesize of input 12 treesize of output 27 [2022-11-20 19:47:57,321 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 19:47:57,349 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 19:47:57,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-20 19:47:57,483 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-20 19:47:57,483 INFO L350 Elim1Store]: Elim1 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 24 treesize of output 28 [2022-11-20 19:47:57,490 INFO L350 Elim1Store]: Elim1 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 14 treesize of output 10 [2022-11-20 19:47:57,752 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-20 19:47:57,753 INFO L350 Elim1Store]: Elim1 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 48 treesize of output 39 [2022-11-20 19:47:58,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 19:47:58,183 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-20 19:47:58,183 INFO L350 Elim1Store]: Elim1 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 3 case distinctions, treesize of input 53 treesize of output 67 [2022-11-20 19:47:58,252 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-20 19:47:58,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 78 [2022-11-20 19:47:58,373 INFO L350 Elim1Store]: Elim1 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 80 treesize of output 68 [2022-11-20 19:47:59,550 INFO L321 Elim1Store]: treesize reduction 88, result has 79.1 percent of original size [2022-11-20 19:47:59,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 146 treesize of output 451