./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 8393723b 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_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/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_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/config/svcomp-MemCleanup-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS --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-8393723 [2022-11-19 07:46:54,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 07:46:54,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 07:46:54,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 07:46:54,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 07:46:54,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 07:46:54,229 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 07:46:54,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 07:46:54,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 07:46:54,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 07:46:54,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 07:46:54,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 07:46:54,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 07:46:54,255 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 07:46:54,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 07:46:54,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 07:46:54,262 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 07:46:54,263 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 07:46:54,265 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 07:46:54,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 07:46:54,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 07:46:54,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 07:46:54,278 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 07:46:54,279 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 07:46:54,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 07:46:54,291 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 07:46:54,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 07:46:54,293 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 07:46:54,294 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 07:46:54,296 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 07:46:54,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 07:46:54,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 07:46:54,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 07:46:54,302 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 07:46:54,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 07:46:54,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 07:46:54,305 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 07:46:54,305 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 07:46:54,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 07:46:54,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 07:46:54,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 07:46:54,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/config/svcomp-MemCleanup-32bit-Taipan_Default.epf [2022-11-19 07:46:54,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 07:46:54,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 07:46:54,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 07:46:54,362 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 07:46:54,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 07:46:54,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 07:46:54,364 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 07:46:54,364 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 07:46:54,365 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 07:46:54,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 07:46:54,366 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 07:46:54,367 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 07:46:54,367 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 07:46:54,367 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 07:46:54,367 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 07:46:54,368 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 07:46:54,368 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 07:46:54,368 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 07:46:54,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 07:46:54,369 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 07:46:54,371 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 07:46:54,372 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 07:46:54,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 07:46:54,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 07:46:54,372 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 07:46:54,373 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 07:46:54,373 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 07:46:54,373 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 07:46:54,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 07:46:54,374 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 07:46:54,375 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 07:46:54,375 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 07:46:54,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 07:46:54,375 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 07:46:54,376 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:46:54,376 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 07:46:54,376 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 07:46:54,376 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 07:46:54,377 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 07:46:54,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 07:46:54,377 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 07:46:54,377 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_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2022-11-19 07:46:54,749 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 07:46:54,783 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 07:46:54,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 07:46:54,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 07:46:54,789 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 07:46:54,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-19 07:46:54,918 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/data/f03070ea3/befa50240d614c01a46e79f44560c912/FLAG4577ade4c [2022-11-19 07:46:55,535 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 07:46:55,536 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2022-11-19 07:46:55,556 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/data/f03070ea3/befa50240d614c01a46e79f44560c912/FLAG4577ade4c [2022-11-19 07:46:55,836 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/data/f03070ea3/befa50240d614c01a46e79f44560c912 [2022-11-19 07:46:55,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 07:46:55,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 07:46:55,843 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 07:46:55,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 07:46:55,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 07:46:55,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:55" (1/1) ... [2022-11-19 07:46:55,860 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a12646a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:55, skipping insertion in model container [2022-11-19 07:46:55,860 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:46:55" (1/1) ... [2022-11-19 07:46:55,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 07:46:55,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 07:46:56,333 WARN L234 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_40a8031b-d56b-4463-98bb-a0f6c07cb10f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-19 07:46:56,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:46:56,414 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 07:46:56,450 WARN L234 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_40a8031b-d56b-4463-98bb-a0f6c07cb10f/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2022-11-19 07:46:56,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 07:46:56,509 INFO L208 MainTranslator]: Completed translation [2022-11-19 07:46:56,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56 WrapperNode [2022-11-19 07:46:56,510 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 07:46:56,511 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 07:46:56,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 07:46:56,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 07:46:56,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,536 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,586 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2022-11-19 07:46:56,593 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 07:46:56,594 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 07:46:56,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 07:46:56,596 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 07:46:56,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,606 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,624 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,635 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,641 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 07:46:56,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 07:46:56,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 07:46:56,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 07:46:56,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (1/1) ... [2022-11-19 07:46:56,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 07:46:56,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:46:56,689 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 07:46:56,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 07:46:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-19 07:46:56,742 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-19 07:46:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 07:46:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 07:46:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 07:46:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 07:46:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 07:46:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-19 07:46:56,743 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-19 07:46:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 07:46:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 07:46:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-19 07:46:56,743 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-19 07:46:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 07:46:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-19 07:46:56,744 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-19 07:46:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 07:46:56,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 07:46:56,953 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 07:46:56,956 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 07:46:57,732 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 07:46:57,875 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 07:46:57,875 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-19 07:46:57,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:57 BoogieIcfgContainer [2022-11-19 07:46:57,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 07:46:57,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 07:46:57,886 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 07:46:57,890 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 07:46:57,890 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:46:55" (1/3) ... [2022-11-19 07:46:57,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e21ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:57, skipping insertion in model container [2022-11-19 07:46:57,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:46:56" (2/3) ... [2022-11-19 07:46:57,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e21ddd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:46:57, skipping insertion in model container [2022-11-19 07:46:57,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:46:57" (3/3) ... [2022-11-19 07:46:57,899 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2022-11-19 07:46:57,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 07:46:57,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2022-11-19 07:46:58,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 07:46:58,019 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;@13466c19, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 07:46:58,020 INFO L358 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2022-11-19 07:46:58,027 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) [2022-11-19 07:46:58,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-19 07:46:58,039 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:58,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-19 07:46:58,041 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)] === [2022-11-19 07:46:58,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:58,047 INFO L85 PathProgramCache]: Analyzing trace with hash 532615, now seen corresponding path program 1 times [2022-11-19 07:46:58,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:58,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358297182] [2022-11-19 07:46:58,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:58,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:58,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:58,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:58,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358297182] [2022-11-19 07:46:58,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358297182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:58,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:58,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:46:58,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335126179] [2022-11-19 07:46:58,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:58,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 07:46:58,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:58,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 07:46:58,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 07:46:58,390 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) [2022-11-19 07:46:58,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:58,546 INFO L93 Difference]: Finished difference Result 193 states and 214 transitions. [2022-11-19 07:46:58,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 07:46:58,550 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 [2022-11-19 07:46:58,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:58,568 INFO L225 Difference]: With dead ends: 193 [2022-11-19 07:46:58,568 INFO L226 Difference]: Without dead ends: 192 [2022-11-19 07:46:58,571 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 [2022-11-19 07:46:58,576 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 [2022-11-19 07:46:58,584 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] [2022-11-19 07:46:58,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-19 07:46:58,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-11-19 07:46:58,660 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) [2022-11-19 07:46:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 213 transitions. [2022-11-19 07:46:58,673 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 213 transitions. Word has length 3 [2022-11-19 07:46:58,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:58,673 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 213 transitions. [2022-11-19 07:46:58,674 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) [2022-11-19 07:46:58,674 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 213 transitions. [2022-11-19 07:46:58,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:46:58,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:58,675 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:46:58,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 07:46:58,675 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)] === [2022-11-19 07:46:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash 16812538, now seen corresponding path program 1 times [2022-11-19 07:46:58,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:58,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785622769] [2022-11-19 07:46:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:58,825 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:58,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785622769] [2022-11-19 07:46:58,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785622769] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:58,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:58,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:46:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257771527] [2022-11-19 07:46:58,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:58,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:58,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:58,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:58,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:58,829 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) [2022-11-19 07:46:59,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:59,053 INFO L93 Difference]: Finished difference Result 190 states and 211 transitions. [2022-11-19 07:46:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:59,053 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 [2022-11-19 07:46:59,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:59,055 INFO L225 Difference]: With dead ends: 190 [2022-11-19 07:46:59,055 INFO L226 Difference]: Without dead ends: 190 [2022-11-19 07:46:59,056 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 [2022-11-19 07:46:59,057 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 13 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 07:46:59,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 288 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 07:46:59,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-19 07:46:59,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-11-19 07:46:59,079 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) [2022-11-19 07:46:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 211 transitions. [2022-11-19 07:46:59,085 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 211 transitions. Word has length 4 [2022-11-19 07:46:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:59,087 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 211 transitions. [2022-11-19 07:46:59,088 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) [2022-11-19 07:46:59,089 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 211 transitions. [2022-11-19 07:46:59,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 07:46:59,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:59,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 07:46:59,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 07:46:59,091 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)] === [2022-11-19 07:46:59,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:59,092 INFO L85 PathProgramCache]: Analyzing trace with hash 16812539, now seen corresponding path program 1 times [2022-11-19 07:46:59,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:59,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496895462] [2022-11-19 07:46:59,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:59,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:59,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:59,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496895462] [2022-11-19 07:46:59,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496895462] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:59,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 07:46:59,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351872019] [2022-11-19 07:46:59,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:59,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 07:46:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 07:46:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 07:46:59,304 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) [2022-11-19 07:46:59,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:46:59,545 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2022-11-19 07:46:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 07:46:59,546 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 [2022-11-19 07:46:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:46:59,547 INFO L225 Difference]: With dead ends: 188 [2022-11-19 07:46:59,547 INFO L226 Difference]: Without dead ends: 188 [2022-11-19 07:46:59,548 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 [2022-11-19 07:46:59,549 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 11 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-19 07:46:59,550 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] [2022-11-19 07:46:59,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-11-19 07:46:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-11-19 07:46:59,560 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) [2022-11-19 07:46:59,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2022-11-19 07:46:59,562 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 4 [2022-11-19 07:46:59,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:46:59,563 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2022-11-19 07:46:59,563 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) [2022-11-19 07:46:59,564 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2022-11-19 07:46:59,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:46:59,564 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:46:59,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:46:59,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 07:46:59,565 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)] === [2022-11-19 07:46:59,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:46:59,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1023004566, now seen corresponding path program 1 times [2022-11-19 07:46:59,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:46:59,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70783862] [2022-11-19 07:46:59,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:46:59,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:46:59,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:46:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:46:59,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:46:59,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70783862] [2022-11-19 07:46:59,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70783862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:46:59,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:46:59,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 07:46:59,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60205583] [2022-11-19 07:46:59,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:46:59,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 07:46:59,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:46:59,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 07:46:59,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 07:46:59,816 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) [2022-11-19 07:47:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:00,202 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2022-11-19 07:47:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:00,203 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 [2022-11-19 07:47:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:00,204 INFO L225 Difference]: With dead ends: 183 [2022-11-19 07:47:00,204 INFO L226 Difference]: Without dead ends: 183 [2022-11-19 07:47:00,205 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 [2022-11-19 07:47:00,216 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 38 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2022-11-19 07:47:00,219 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] [2022-11-19 07:47:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-19 07:47:00,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-11-19 07:47:00,226 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) [2022-11-19 07:47:00,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 204 transitions. [2022-11-19 07:47:00,228 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 204 transitions. Word has length 6 [2022-11-19 07:47:00,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:00,228 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 204 transitions. [2022-11-19 07:47:00,229 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) [2022-11-19 07:47:00,229 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 204 transitions. [2022-11-19 07:47:00,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 07:47:00,230 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:00,230 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 07:47:00,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 07:47:00,231 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)] === [2022-11-19 07:47:00,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1023004565, now seen corresponding path program 1 times [2022-11-19 07:47:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:00,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347134708] [2022-11-19 07:47:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:00,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:00,564 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:00,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347134708] [2022-11-19 07:47:00,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347134708] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:00,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:00,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:00,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898083377] [2022-11-19 07:47:00,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:00,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 07:47:00,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:00,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 07:47:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 07:47:00,573 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) [2022-11-19 07:47:01,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:01,021 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2022-11-19 07:47:01,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:01,021 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 [2022-11-19 07:47:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:01,023 INFO L225 Difference]: With dead ends: 178 [2022-11-19 07:47:01,023 INFO L226 Difference]: Without dead ends: 178 [2022-11-19 07:47:01,023 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 [2022-11-19 07:47:01,024 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, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:01,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 408 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 07:47:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-19 07:47:01,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-11-19 07:47:01,041 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) [2022-11-19 07:47:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 199 transitions. [2022-11-19 07:47:01,043 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 199 transitions. Word has length 6 [2022-11-19 07:47:01,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:01,043 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 199 transitions. [2022-11-19 07:47:01,043 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) [2022-11-19 07:47:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 199 transitions. [2022-11-19 07:47:01,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:47:01,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:01,044 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:01,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 07:47:01,045 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)] === [2022-11-19 07:47:01,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:01,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1648370340, now seen corresponding path program 1 times [2022-11-19 07:47:01,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092529859] [2022-11-19 07:47:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:01,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:01,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:01,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:01,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092529859] [2022-11-19 07:47:01,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092529859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:01,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:01,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:01,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237979084] [2022-11-19 07:47:01,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:01,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:01,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:01,135 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) [2022-11-19 07:47:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:01,369 INFO L93 Difference]: Finished difference Result 177 states and 198 transitions. [2022-11-19 07:47:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:01,370 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 [2022-11-19 07:47:01,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:01,372 INFO L225 Difference]: With dead ends: 177 [2022-11-19 07:47:01,372 INFO L226 Difference]: Without dead ends: 177 [2022-11-19 07:47:01,372 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 [2022-11-19 07:47:01,377 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 8 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-19 07:47:01,377 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] [2022-11-19 07:47:01,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-19 07:47:01,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-19 07:47:01,388 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) [2022-11-19 07:47:01,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-11-19 07:47:01,389 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 7 [2022-11-19 07:47:01,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:01,390 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-11-19 07:47:01,390 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) [2022-11-19 07:47:01,391 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-11-19 07:47:01,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 07:47:01,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:01,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:01,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 07:47:01,392 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)] === [2022-11-19 07:47:01,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:01,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1648370339, now seen corresponding path program 1 times [2022-11-19 07:47:01,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:01,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434798995] [2022-11-19 07:47:01,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:01,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:01,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:01,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:01,537 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:01,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434798995] [2022-11-19 07:47:01,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434798995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:01,538 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:01,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 07:47:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967296805] [2022-11-19 07:47:01,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:01,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 07:47:01,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:01,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 07:47:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 07:47:01,541 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) [2022-11-19 07:47:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:01,815 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2022-11-19 07:47:01,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 07:47:01,816 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 [2022-11-19 07:47:01,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:01,817 INFO L225 Difference]: With dead ends: 176 [2022-11-19 07:47:01,817 INFO L226 Difference]: Without dead ends: 176 [2022-11-19 07:47:01,818 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 [2022-11-19 07:47:01,818 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2022-11-19 07:47:01,819 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] [2022-11-19 07:47:01,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-19 07:47:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-11-19 07:47:01,826 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) [2022-11-19 07:47:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 197 transitions. [2022-11-19 07:47:01,828 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 197 transitions. Word has length 7 [2022-11-19 07:47:01,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:01,829 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 197 transitions. [2022-11-19 07:47:01,829 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) [2022-11-19 07:47:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 197 transitions. [2022-11-19 07:47:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:47:01,830 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:01,830 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:01,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 07:47:01,831 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)] === [2022-11-19 07:47:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:01,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1889969027, now seen corresponding path program 1 times [2022-11-19 07:47:01,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:01,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316251522] [2022-11-19 07:47:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:01,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:01,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:02,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:02,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316251522] [2022-11-19 07:47:02,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316251522] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:02,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:02,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:47:02,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657448964] [2022-11-19 07:47:02,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:02,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:02,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:02,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:02,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:02,241 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) [2022-11-19 07:47:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:02,747 INFO L93 Difference]: Finished difference Result 175 states and 196 transitions. [2022-11-19 07:47:02,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:02,750 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 [2022-11-19 07:47:02,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:02,751 INFO L225 Difference]: With dead ends: 175 [2022-11-19 07:47:02,751 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:47:02,752 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:02,752 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 156 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:02,753 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 296 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:02,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:47:02,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-11-19 07:47:02,757 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) [2022-11-19 07:47:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 196 transitions. [2022-11-19 07:47:02,758 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 196 transitions. Word has length 13 [2022-11-19 07:47:02,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:02,760 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 196 transitions. [2022-11-19 07:47:02,760 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) [2022-11-19 07:47:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 196 transitions. [2022-11-19 07:47:02,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 07:47:02,761 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:02,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:02,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 07:47:02,761 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)] === [2022-11-19 07:47:02,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:02,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1889969028, now seen corresponding path program 1 times [2022-11-19 07:47:02,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:02,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310829612] [2022-11-19 07:47:02,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:02,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:02,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:03,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:03,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310829612] [2022-11-19 07:47:03,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310829612] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:03,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:03,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 07:47:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339771056] [2022-11-19 07:47:03,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:03,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 07:47:03,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 07:47:03,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:03,139 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) [2022-11-19 07:47:03,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:03,615 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2022-11-19 07:47:03,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:03,618 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 [2022-11-19 07:47:03,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:03,621 INFO L225 Difference]: With dead ends: 175 [2022-11-19 07:47:03,621 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:47:03,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-19 07:47:03,622 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 207 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:03,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 197 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:47:03,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-11-19 07:47:03,633 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) [2022-11-19 07:47:03,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 195 transitions. [2022-11-19 07:47:03,635 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 195 transitions. Word has length 13 [2022-11-19 07:47:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:03,635 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 195 transitions. [2022-11-19 07:47:03,635 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) [2022-11-19 07:47:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 195 transitions. [2022-11-19 07:47:03,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:47:03,637 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:03,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:03,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 07:47:03,638 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)] === [2022-11-19 07:47:03,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:03,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1074212787, now seen corresponding path program 1 times [2022-11-19 07:47:03,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:03,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190198205] [2022-11-19 07:47:03,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:03,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:04,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:04,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:04,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190198205] [2022-11-19 07:47:04,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190198205] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:04,127 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:04,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:47:04,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769697740] [2022-11-19 07:47:04,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:04,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 07:47:04,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:04,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 07:47:04,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-19 07:47:04,129 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) [2022-11-19 07:47:04,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:04,684 INFO L93 Difference]: Finished difference Result 173 states and 194 transitions. [2022-11-19 07:47:04,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 07:47:04,684 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 [2022-11-19 07:47:04,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:04,686 INFO L225 Difference]: With dead ends: 173 [2022-11-19 07:47:04,686 INFO L226 Difference]: Without dead ends: 173 [2022-11-19 07:47:04,687 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 [2022-11-19 07:47:04,687 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:04,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 350 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-11-19 07:47:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-11-19 07:47:04,692 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) [2022-11-19 07:47:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2022-11-19 07:47:04,694 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 17 [2022-11-19 07:47:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:04,694 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2022-11-19 07:47:04,694 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) [2022-11-19 07:47:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2022-11-19 07:47:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 07:47:04,695 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:04,695 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 07:47:04,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 07:47:04,696 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)] === [2022-11-19 07:47:04,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:04,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1074212786, now seen corresponding path program 1 times [2022-11-19 07:47:04,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:04,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109270592] [2022-11-19 07:47:04,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:04,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:05,465 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:05,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109270592] [2022-11-19 07:47:05,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109270592] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:05,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:05,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 07:47:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424366920] [2022-11-19 07:47:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:05,468 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) [2022-11-19 07:47:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:06,021 INFO L93 Difference]: Finished difference Result 185 states and 212 transitions. [2022-11-19 07:47:06,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:06,022 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 [2022-11-19 07:47:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:06,024 INFO L225 Difference]: With dead ends: 185 [2022-11-19 07:47:06,024 INFO L226 Difference]: Without dead ends: 185 [2022-11-19 07:47:06,024 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 [2022-11-19 07:47:06,025 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:06,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 255 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-11-19 07:47:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2022-11-19 07:47:06,032 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) [2022-11-19 07:47:06,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 206 transitions. [2022-11-19 07:47:06,034 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 206 transitions. Word has length 17 [2022-11-19 07:47:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:06,034 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 206 transitions. [2022-11-19 07:47:06,035 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) [2022-11-19 07:47:06,035 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 206 transitions. [2022-11-19 07:47:06,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-19 07:47:06,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:06,036 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] [2022-11-19 07:47:06,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 07:47:06,037 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)] === [2022-11-19 07:47:06,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:06,037 INFO L85 PathProgramCache]: Analyzing trace with hash -908910069, now seen corresponding path program 1 times [2022-11-19 07:47:06,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:06,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545343267] [2022-11-19 07:47:06,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:06,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:06,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:06,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 07:47:06,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:06,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545343267] [2022-11-19 07:47:06,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545343267] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:06,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358370889] [2022-11-19 07:47:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:06,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:06,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:06,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:06,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 07:47:07,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:07,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-19 07:47:07,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:07,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,134 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 [2022-11-19 07:47:07,159 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:47:07,160 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 [2022-11-19 07:47:07,209 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 [2022-11-19 07:47:07,232 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 [2022-11-19 07:47:07,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,331 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 [2022-11-19 07:47:07,414 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 [2022-11-19 07:47:07,424 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 [2022-11-19 07:47:07,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,474 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 [2022-11-19 07:47:07,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-19 07:47:07,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:07,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358370889] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:07,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1745974993] [2022-11-19 07:47:07,712 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2022-11-19 07:47:07,712 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:07,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:07,736 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:07,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:07,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,853 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 [2022-11-19 07:47:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:07,978 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:07,978 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 [2022-11-19 07:47:08,016 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 [2022-11-19 07:47:08,021 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 [2022-11-19 07:47:08,031 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 [2022-11-19 07:47:08,036 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 [2022-11-19 07:47:08,044 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 [2022-11-19 07:47:08,055 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 [2022-11-19 07:47:08,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,064 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 [2022-11-19 07:47:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,079 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 [2022-11-19 07:47:08,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,135 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-19 07:47:08,135 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 [2022-11-19 07:47:08,160 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 [2022-11-19 07:47:08,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,209 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-19 07:47:08,209 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 [2022-11-19 07:47:08,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,280 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-19 07:47:08,280 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 [2022-11-19 07:47:08,295 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 [2022-11-19 07:47:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,378 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-19 07:47:08,378 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 [2022-11-19 07:47:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,516 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 [2022-11-19 07:47:08,527 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 [2022-11-19 07:47:08,536 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 [2022-11-19 07:47:08,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,635 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:08,636 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 [2022-11-19 07:47:08,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,701 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 [2022-11-19 07:47:08,715 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 [2022-11-19 07:47:08,727 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 [2022-11-19 07:47:08,836 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 [2022-11-19 07:47:08,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,852 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 [2022-11-19 07:47:08,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,878 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 [2022-11-19 07:47:08,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:08,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,021 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:09,022 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 [2022-11-19 07:47:09,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,085 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 [2022-11-19 07:47:09,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,100 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 [2022-11-19 07:47:09,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,114 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 [2022-11-19 07:47:09,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,130 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 [2022-11-19 07:47:09,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,211 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:09,211 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 [2022-11-19 07:47:09,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,266 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 [2022-11-19 07:47:09,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,278 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 [2022-11-19 07:47:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,296 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 [2022-11-19 07:47:09,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:09,312 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 [2022-11-19 07:47:09,563 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-19 07:47:09,564 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 [2022-11-19 07:47:10,027 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:10,030 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:10,216 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-19 07:47:10,217 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 [2022-11-19 07:47:10,722 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:10,725 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:10,942 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-19 07:47:10,942 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 [2022-11-19 07:47:11,354 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:11,360 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:11,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:11,569 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-19 07:47:11,572 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 [2022-11-19 07:47:11,959 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:11,963 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-19 07:47:12,236 INFO L321 Elim1Store]: treesize reduction 84, result has 13.4 percent of original size [2022-11-19 07:47:12,237 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 [2022-11-19 07:47:12,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,661 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:12,661 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 [2022-11-19 07:47:12,680 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-19 07:47:12,688 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 [2022-11-19 07:47:12,694 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 [2022-11-19 07:47:12,705 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 [2022-11-19 07:47:12,711 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 [2022-11-19 07:47:12,718 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 [2022-11-19 07:47:12,730 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 [2022-11-19 07:47:12,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,739 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 [2022-11-19 07:47:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,749 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 [2022-11-19 07:47:12,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:12,797 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-19 07:47:12,798 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 [2022-11-19 07:47:12,810 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 [2022-11-19 07:47:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:12,845 INFO L321 Elim1Store]: treesize reduction 16, result has 50.0 percent of original size [2022-11-19 07:47:12,846 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 [2022-11-19 07:47:12,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:12,888 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2022-11-19 07:47:12,889 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 [2022-11-19 07:47:12,901 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 [2022-11-19 07:47:12,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 07:47:12,930 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-11-19 07:47:12,930 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 [2022-11-19 07:47:12,938 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:15,972 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 [2022-11-19 07:47:15,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:15,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:15,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2022-11-19 07:47:15,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509784708] [2022-11-19 07:47:15,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:15,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-19 07:47:15,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:15,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-19 07:47:15,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=713, Unknown=2, NotChecked=110, Total=930 [2022-11-19 07:47:15,975 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) [2022-11-19 07:47:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:16,722 INFO L93 Difference]: Finished difference Result 181 states and 205 transitions. [2022-11-19 07:47:16,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:16,723 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 [2022-11-19 07:47:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:16,724 INFO L225 Difference]: With dead ends: 181 [2022-11-19 07:47:16,724 INFO L226 Difference]: Without dead ends: 181 [2022-11-19 07:47:16,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=113, Invalid=763, Unknown=2, NotChecked=114, Total=992 [2022-11-19 07:47:16,725 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 [2022-11-19 07:47:16,726 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] [2022-11-19 07:47:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-19 07:47:16,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 172. [2022-11-19 07:47:16,730 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) [2022-11-19 07:47:16,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-11-19 07:47:16,731 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 27 [2022-11-19 07:47:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:16,732 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-11-19 07:47:16,732 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) [2022-11-19 07:47:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-11-19 07:47:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:47:16,733 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:16,733 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] [2022-11-19 07:47:16,743 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:16,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-19 07:47:16,943 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)] === [2022-11-19 07:47:16,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:16,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508004, now seen corresponding path program 1 times [2022-11-19 07:47:16,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:16,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985230575] [2022-11-19 07:47:16,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:16,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:17,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:17,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985230575] [2022-11-19 07:47:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985230575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:17,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:17,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:47:17,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832495919] [2022-11-19 07:47:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:17,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:17,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:17,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:17,366 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) [2022-11-19 07:47:17,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:17,907 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2022-11-19 07:47:17,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:17,908 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 [2022-11-19 07:47:17,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:17,909 INFO L225 Difference]: With dead ends: 175 [2022-11-19 07:47:17,909 INFO L226 Difference]: Without dead ends: 175 [2022-11-19 07:47:17,909 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 [2022-11-19 07:47:17,910 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, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:17,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 264 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 07:47:17,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-19 07:47:17,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2022-11-19 07:47:17,914 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) [2022-11-19 07:47:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-11-19 07:47:17,918 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 30 [2022-11-19 07:47:17,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:17,919 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-11-19 07:47:17,919 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) [2022-11-19 07:47:17,919 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-11-19 07:47:17,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-19 07:47:17,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:17,923 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] [2022-11-19 07:47:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 07:47:17,924 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)] === [2022-11-19 07:47:17,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:17,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1672508005, now seen corresponding path program 1 times [2022-11-19 07:47:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:17,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154483167] [2022-11-19 07:47:17,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:17,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:18,275 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:18,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:18,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154483167] [2022-11-19 07:47:18,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154483167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:18,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:18,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:47:18,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158926891] [2022-11-19 07:47:18,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:18,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:18,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:18,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:18,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:18,278 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) [2022-11-19 07:47:18,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:18,894 INFO L93 Difference]: Finished difference Result 187 states and 217 transitions. [2022-11-19 07:47:18,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:47:18,895 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 [2022-11-19 07:47:18,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:18,897 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:47:18,897 INFO L226 Difference]: Without dead ends: 187 [2022-11-19 07:47:18,897 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 [2022-11-19 07:47:18,898 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 371 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 07:47:18,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 151 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 07:47:18,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-19 07:47:18,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 165. [2022-11-19 07:47:18,910 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) [2022-11-19 07:47:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-11-19 07:47:18,913 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 30 [2022-11-19 07:47:18,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:18,914 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-11-19 07:47:18,914 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) [2022-11-19 07:47:18,914 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-11-19 07:47:18,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:47:18,925 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:18,925 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] [2022-11-19 07:47:18,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 07:47:18,926 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)] === [2022-11-19 07:47:18,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:18,928 INFO L85 PathProgramCache]: Analyzing trace with hash 308140793, now seen corresponding path program 1 times [2022-11-19 07:47:18,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:18,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095495446] [2022-11-19 07:47:18,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:18,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:19,289 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:19,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095495446] [2022-11-19 07:47:19,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095495446] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:19,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:19,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:47:19,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951041848] [2022-11-19 07:47:19,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:19,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:19,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:19,294 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) [2022-11-19 07:47:19,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:19,740 INFO L93 Difference]: Finished difference Result 168 states and 192 transitions. [2022-11-19 07:47:19,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 07:47:19,740 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 [2022-11-19 07:47:19,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:19,742 INFO L225 Difference]: With dead ends: 168 [2022-11-19 07:47:19,742 INFO L226 Difference]: Without dead ends: 168 [2022-11-19 07:47:19,742 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 [2022-11-19 07:47:19,743 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 [2022-11-19 07:47:19,743 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] [2022-11-19 07:47:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-19 07:47:19,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 158. [2022-11-19 07:47:19,747 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) [2022-11-19 07:47:19,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2022-11-19 07:47:19,748 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 31 [2022-11-19 07:47:19,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:19,748 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2022-11-19 07:47:19,748 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) [2022-11-19 07:47:19,748 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2022-11-19 07:47:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-19 07:47:19,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:19,749 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] [2022-11-19 07:47:19,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 07:47:19,749 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)] === [2022-11-19 07:47:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:19,750 INFO L85 PathProgramCache]: Analyzing trace with hash 308140794, now seen corresponding path program 1 times [2022-11-19 07:47:19,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:19,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096264024] [2022-11-19 07:47:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:19,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:19,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:20,092 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:20,092 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:20,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096264024] [2022-11-19 07:47:20,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096264024] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 07:47:20,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 07:47:20,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 07:47:20,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030902839] [2022-11-19 07:47:20,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 07:47:20,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 07:47:20,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 07:47:20,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-11-19 07:47:20,097 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) [2022-11-19 07:47:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:20,776 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2022-11-19 07:47:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 07:47:20,776 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 [2022-11-19 07:47:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:20,778 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:47:20,778 INFO L226 Difference]: Without dead ends: 187 [2022-11-19 07:47:20,778 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 [2022-11-19 07:47:20,778 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 [2022-11-19 07:47:20,779 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] [2022-11-19 07:47:20,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-19 07:47:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 163. [2022-11-19 07:47:20,785 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) [2022-11-19 07:47:20,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 189 transitions. [2022-11-19 07:47:20,786 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 189 transitions. Word has length 31 [2022-11-19 07:47:20,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:20,787 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 189 transitions. [2022-11-19 07:47:20,787 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) [2022-11-19 07:47:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 189 transitions. [2022-11-19 07:47:20,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 07:47:20,790 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:20,790 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] [2022-11-19 07:47:20,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 07:47:20,791 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)] === [2022-11-19 07:47:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:20,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1565693152, now seen corresponding path program 1 times [2022-11-19 07:47:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:20,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778275673] [2022-11-19 07:47:20,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:20,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:22,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:22,372 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:22,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778275673] [2022-11-19 07:47:22,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778275673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:22,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888860886] [2022-11-19 07:47:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:22,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:22,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:22,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:22,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 07:47:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:22,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-19 07:47:22,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:22,692 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 [2022-11-19 07:47:22,850 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:47:22,851 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 [2022-11-19 07:47:22,859 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 [2022-11-19 07:47:23,058 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:23,058 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 [2022-11-19 07:47:23,122 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:47:23,122 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 [2022-11-19 07:47:23,389 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 [2022-11-19 07:47:23,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:23,436 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-19 07:47:23,436 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 [2022-11-19 07:47:23,460 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 [2022-11-19 07:47:23,543 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 [2022-11-19 07:47:23,642 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 [2022-11-19 07:47:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:47:23,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:23,831 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-19 07:47:23,831 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 [2022-11-19 07:47:23,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888860886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:23,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488112917] [2022-11-19 07:47:24,000 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-19 07:47:24,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:24,001 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:24,001 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:24,001 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:24,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,054 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 [2022-11-19 07:47:24,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,141 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:24,142 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 [2022-11-19 07:47:24,180 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 [2022-11-19 07:47:24,185 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 [2022-11-19 07:47:24,192 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 [2022-11-19 07:47:24,197 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 [2022-11-19 07:47:24,201 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 [2022-11-19 07:47:24,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,214 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 [2022-11-19 07:47:24,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,224 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 [2022-11-19 07:47:24,231 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 [2022-11-19 07:47:24,245 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 [2022-11-19 07:47:24,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,281 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-19 07:47:24,282 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 [2022-11-19 07:47:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,323 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-19 07:47:24,323 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 [2022-11-19 07:47:24,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,399 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-19 07:47:24,400 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 [2022-11-19 07:47:24,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,470 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-19 07:47:24,470 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 [2022-11-19 07:47:24,482 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 [2022-11-19 07:47:24,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,536 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 [2022-11-19 07:47:24,547 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 [2022-11-19 07:47:24,556 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 [2022-11-19 07:47:24,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,643 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:24,643 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 [2022-11-19 07:47:24,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,715 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 [2022-11-19 07:47:24,724 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 [2022-11-19 07:47:24,737 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 [2022-11-19 07:47:24,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,839 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 [2022-11-19 07:47:24,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,854 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 [2022-11-19 07:47:24,871 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 [2022-11-19 07:47:24,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:24,964 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 [2022-11-19 07:47:24,978 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 [2022-11-19 07:47:24,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,003 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 [2022-11-19 07:47:25,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,078 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:25,079 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 [2022-11-19 07:47:25,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,134 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 [2022-11-19 07:47:25,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,157 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 [2022-11-19 07:47:25,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,182 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 [2022-11-19 07:47:25,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,197 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 [2022-11-19 07:47:25,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,282 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:25,283 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 [2022-11-19 07:47:25,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,341 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 [2022-11-19 07:47:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,359 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 [2022-11-19 07:47:25,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,375 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 [2022-11-19 07:47:25,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,390 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 [2022-11-19 07:47:25,460 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 [2022-11-19 07:47:25,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,659 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-19 07:47:25,659 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 [2022-11-19 07:47:25,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,739 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:25,739 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 [2022-11-19 07:47:25,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:25,825 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:25,825 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 [2022-11-19 07:47:25,857 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 140 for LOIs [2022-11-19 07:47:26,838 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-11-19 07:47:26,891 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 60 for LOIs [2022-11-19 07:47:26,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:47:43,091 WARN L233 SmtUtils]: Spent 6.16s 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) [2022-11-19 07:47:49,093 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 [2022-11-19 07:47:49,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:47:49,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:47:49,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 35 [2022-11-19 07:47:49,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66104905] [2022-11-19 07:47:49,093 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:47:49,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-19 07:47:49,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:47:49,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-19 07:47:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=3299, Unknown=10, NotChecked=116, Total=3660 [2022-11-19 07:47:49,096 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) [2022-11-19 07:47:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:47:51,517 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2022-11-19 07:47:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 07:47:51,518 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 [2022-11-19 07:47:51,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:47:51,519 INFO L225 Difference]: With dead ends: 187 [2022-11-19 07:47:51,519 INFO L226 Difference]: Without dead ends: 187 [2022-11-19 07:47:51,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 24.3s TimeCoverageRelationStatistics Valid=358, Invalid=4886, Unknown=16, NotChecked=142, Total=5402 [2022-11-19 07:47:51,521 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 [2022-11-19 07:47:51,521 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] [2022-11-19 07:47:51,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-11-19 07:47:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2022-11-19 07:47:51,526 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) [2022-11-19 07:47:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 208 transitions. [2022-11-19 07:47:51,527 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 208 transitions. Word has length 36 [2022-11-19 07:47:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:47:51,527 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 208 transitions. [2022-11-19 07:47:51,528 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) [2022-11-19 07:47:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 208 transitions. [2022-11-19 07:47:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:47:51,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:47:51,529 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] [2022-11-19 07:47:51,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 07:47:51,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:51,729 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)] === [2022-11-19 07:47:51,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:47:51,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1403489686, now seen corresponding path program 1 times [2022-11-19 07:47:51,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:47:51,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493858680] [2022-11-19 07:47:51,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:51,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:47:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:55,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:47:55,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:47:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493858680] [2022-11-19 07:47:55,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493858680] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:55,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6041506] [2022-11-19 07:47:55,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:47:55,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:47:55,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:47:55,071 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:47:55,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 07:47:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:47:55,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-19 07:47:55,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:47:55,447 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 [2022-11-19 07:47:55,735 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:47:55,735 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 [2022-11-19 07:47:55,947 INFO L321 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2022-11-19 07:47:55,947 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 [2022-11-19 07:47:56,048 INFO L321 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2022-11-19 07:47:56,048 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 [2022-11-19 07:47:56,409 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 [2022-11-19 07:47:56,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:56,481 INFO L321 Elim1Store]: treesize reduction 51, result has 48.0 percent of original size [2022-11-19 07:47:56,481 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 [2022-11-19 07:47:56,514 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 [2022-11-19 07:47:56,530 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 [2022-11-19 07:47:56,623 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 [2022-11-19 07:47:56,736 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 [2022-11-19 07:47:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-19 07:47:56,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 07:47:56,941 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 [2022-11-19 07:47:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6041506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:47:57,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674062813] [2022-11-19 07:47:57,211 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-19 07:47:57,211 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 07:47:57,211 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 07:47:57,212 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 07:47:57,212 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 07:47:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,257 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 [2022-11-19 07:47:57,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,367 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:57,367 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 [2022-11-19 07:47:57,385 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 [2022-11-19 07:47:57,390 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 [2022-11-19 07:47:57,396 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 [2022-11-19 07:47:57,401 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 [2022-11-19 07:47:57,405 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 [2022-11-19 07:47:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,416 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 [2022-11-19 07:47:57,422 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 [2022-11-19 07:47:57,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,430 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 [2022-11-19 07:47:57,448 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 [2022-11-19 07:47:57,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,481 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-19 07:47:57,481 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 [2022-11-19 07:47:57,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,519 INFO L321 Elim1Store]: treesize reduction 38, result has 34.5 percent of original size [2022-11-19 07:47:57,520 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 [2022-11-19 07:47:57,539 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 [2022-11-19 07:47:57,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,581 INFO L321 Elim1Store]: treesize reduction 66, result has 32.0 percent of original size [2022-11-19 07:47:57,581 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 [2022-11-19 07:47:57,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,659 INFO L321 Elim1Store]: treesize reduction 48, result has 50.5 percent of original size [2022-11-19 07:47:57,660 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 [2022-11-19 07:47:57,703 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 [2022-11-19 07:47:57,713 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 [2022-11-19 07:47:57,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,733 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 [2022-11-19 07:47:57,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,809 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:57,810 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 [2022-11-19 07:47:57,842 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 [2022-11-19 07:47:57,851 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 [2022-11-19 07:47:57,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,870 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 [2022-11-19 07:47:57,940 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 [2022-11-19 07:47:57,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,952 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 [2022-11-19 07:47:57,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:57,967 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 [2022-11-19 07:47:58,034 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 [2022-11-19 07:47:58,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,050 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 [2022-11-19 07:47:58,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,066 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 [2022-11-19 07:47:58,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,144 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:58,144 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 [2022-11-19 07:47:58,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,197 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 [2022-11-19 07:47:58,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,211 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 [2022-11-19 07:47:58,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,227 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 [2022-11-19 07:47:58,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,240 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 [2022-11-19 07:47:58,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,313 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:58,314 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 [2022-11-19 07:47:58,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,388 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 [2022-11-19 07:47:58,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,406 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 [2022-11-19 07:47:58,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,418 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 [2022-11-19 07:47:58,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,432 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 [2022-11-19 07:47:58,503 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 [2022-11-19 07:47:58,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,664 INFO L321 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-11-19 07:47:58,664 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 [2022-11-19 07:47:58,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,739 INFO L321 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2022-11-19 07:47:58,739 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 [2022-11-19 07:47:58,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:47:58,819 INFO L321 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2022-11-19 07:47:58,820 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 [2022-11-19 07:47:58,837 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 141 for LOIs [2022-11-19 07:47:59,743 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 70 for LOIs [2022-11-19 07:47:59,869 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 75 for LOIs [2022-11-19 07:47:59,897 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 07:48:17,259 WARN L233 SmtUtils]: Spent 6.15s 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) [2022-11-19 07:48:24,292 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 [2022-11-19 07:48:24,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 07:48:24,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 07:48:24,293 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 43 [2022-11-19 07:48:24,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063765262] [2022-11-19 07:48:24,293 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 07:48:24,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-19 07:48:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 07:48:24,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-19 07:48:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=4393, Unknown=33, NotChecked=134, Total=4830 [2022-11-19 07:48:24,296 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) [2022-11-19 07:48:29,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 07:48:29,078 INFO L93 Difference]: Finished difference Result 222 states and 262 transitions. [2022-11-19 07:48:29,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-19 07:48:29,079 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 [2022-11-19 07:48:29,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 07:48:29,080 INFO L225 Difference]: With dead ends: 222 [2022-11-19 07:48:29,080 INFO L226 Difference]: Without dead ends: 222 [2022-11-19 07:48:29,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=494, Invalid=8026, Unknown=40, NotChecked=182, Total=8742 [2022-11-19 07:48:29,084 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 [2022-11-19 07:48:29,084 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] [2022-11-19 07:48:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-11-19 07:48:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 175. [2022-11-19 07:48:29,089 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) [2022-11-19 07:48:29,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 207 transitions. [2022-11-19 07:48:29,090 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 207 transitions. Word has length 38 [2022-11-19 07:48:29,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 07:48:29,091 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 207 transitions. [2022-11-19 07:48:29,091 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) [2022-11-19 07:48:29,091 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 207 transitions. [2022-11-19 07:48:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 07:48:29,092 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 07:48:29,092 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] [2022-11-19 07:48:29,099 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 07:48:29,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-19 07:48:29,299 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)] === [2022-11-19 07:48:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 07:48:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1403500622, now seen corresponding path program 1 times [2022-11-19 07:48:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 07:48:29,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956266452] [2022-11-19 07:48:29,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:29,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 07:48:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 07:48:31,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 07:48:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956266452] [2022-11-19 07:48:31,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956266452] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 07:48:31,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301785873] [2022-11-19 07:48:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 07:48:31,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 07:48:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 07:48:31,242 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 07:48:31,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40a8031b-d56b-4463-98bb-a0f6c07cb10f/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 07:48:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 07:48:31,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-19 07:48:31,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 07:48:31,508 INFO L321 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2022-11-19 07:48:31,508 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 [2022-11-19 07:48:31,637 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 [2022-11-19 07:48:31,662 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-19 07:48:31,663 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 [2022-11-19 07:48:31,810 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-19 07:48:31,810 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 [2022-11-19 07:48:31,830 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 [2022-11-19 07:48:32,101 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-19 07:48:32,101 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 [2022-11-19 07:48:32,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 07:48:32,547 INFO L321 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-19 07:48:32,548 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 [2022-11-19 07:48:32,619 INFO L321 Elim1Store]: treesize reduction 76, result has 39.7 percent of original size [2022-11-19 07:48:32,619 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 [2022-11-19 07:48:32,749 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 [2022-11-19 07:48:33,933 INFO L321 Elim1Store]: treesize reduction 88, result has 79.1 percent of original size [2022-11-19 07:48:33,934 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 [2022-11-19 07:54:30,560 WARN L233 SmtUtils]: Spent 6.74s on a formula simplification that was a NOOP. DAG size: 3207 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-19 07:54:42,569 WARN L233 SmtUtils]: Spent 5.94s on a formula simplification that was a NOOP. DAG size: 3205 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)