./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:43:16,976 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:43:16,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:43:17,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:43:17,019 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:43:17,021 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:43:17,022 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:43:17,023 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:43:17,025 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:43:17,026 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:43:17,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:43:17,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:43:17,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:43:17,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:43:17,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:43:17,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:43:17,036 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:43:17,037 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:43:17,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:43:17,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:43:17,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:43:17,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:43:17,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:43:17,054 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:43:17,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:43:17,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:43:17,067 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:43:17,068 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:43:17,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:43:17,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:43:17,070 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:43:17,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:43:17,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:43:17,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:43:17,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:43:17,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:43:17,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:43:17,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:43:17,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:43:17,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:43:17,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:43:17,080 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:43:17,103 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:43:17,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:43:17,103 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:43:17,104 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:43:17,104 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:43:17,105 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:43:17,105 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:43:17,105 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:43:17,105 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:43:17,105 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:43:17,107 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:43:17,107 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:43:17,107 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:43:17,107 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:43:17,107 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:43:17,108 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:43:17,108 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:43:17,108 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:43:17,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:43:17,109 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:43:17,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:43:17,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:43:17,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:43:17,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:43:17,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:43:17,110 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:43:17,111 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:43:17,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:43:17,111 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:43:17,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:43:17,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:43:17,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:43:17,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:17,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:43:17,113 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:43:17,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:43:17,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:43:17,114 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:43:17,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:43:17,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:43:17,115 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:43:17,115 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_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2022-11-03 01:43:17,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:43:17,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:43:17,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:43:17,457 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:43:17,458 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:43:17,459 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-03 01:43:17,536 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/49a54343a/b06b936ae59841ae8a8af6278ab68cd6/FLAG2e5285385 [2022-11-03 01:43:18,137 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:43:18,138 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-03 01:43:18,155 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/49a54343a/b06b936ae59841ae8a8af6278ab68cd6/FLAG2e5285385 [2022-11-03 01:43:18,404 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/49a54343a/b06b936ae59841ae8a8af6278ab68cd6 [2022-11-03 01:43:18,407 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:43:18,408 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:43:18,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:18,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:43:18,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:43:18,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:18,420 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c9f6c02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18, skipping insertion in model container [2022-11-03 01:43:18,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:18,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:43:18,483 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:43:18,774 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-03 01:43:18,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:18,841 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:43:18,900 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-03 01:43:18,929 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:43:18,973 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:43:18,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18 WrapperNode [2022-11-03 01:43:18,974 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:43:18,975 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:18,975 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:43:18,975 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:43:18,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,018 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,059 INFO L138 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2022-11-03 01:43:19,060 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:43:19,061 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:43:19,061 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:43:19,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:43:19,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:43:19,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:43:19,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:43:19,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:43:19,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (1/1) ... [2022-11-03 01:43:19,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:43:19,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:19,170 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:43:19,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:43:19,217 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-03 01:43:19,217 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-03 01:43:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:43:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:43:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:43:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:43:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:43:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-03 01:43:19,219 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-03 01:43:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:43:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:43:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-03 01:43:19,219 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-03 01:43:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:43:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-03 01:43:19,220 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-03 01:43:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:43:19,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:43:19,421 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:43:19,423 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:43:19,936 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:43:20,057 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:43:20,063 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-03 01:43:20,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:20 BoogieIcfgContainer [2022-11-03 01:43:20,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:43:20,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:43:20,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:43:20,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:43:20,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:43:18" (1/3) ... [2022-11-03 01:43:20,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2ebf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:20, skipping insertion in model container [2022-11-03 01:43:20,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:43:18" (2/3) ... [2022-11-03 01:43:20,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2ebf40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:43:20, skipping insertion in model container [2022-11-03 01:43:20,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:43:20" (3/3) ... [2022-11-03 01:43:20,079 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2022-11-03 01:43:20,098 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:43:20,098 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:43:20,161 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:43:20,168 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@13f64dd8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:43:20,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:43:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 64 states have internal predecessors, (97), 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) [2022-11-03 01:43:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-03 01:43:20,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:20,182 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:20,182 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -824570068, now seen corresponding path program 1 times [2022-11-03 01:43:20,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:20,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310878377] [2022-11-03 01:43:20,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:20,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:43:20,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:20,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310878377] [2022-11-03 01:43:20,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310878377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:43:20,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:43:20,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:43:20,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243200461] [2022-11-03 01:43:20,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:43:20,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:43:20,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:20,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:43:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:43:20,514 INFO L87 Difference]: Start difference. First operand has 78 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 64 states have internal predecessors, (97), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:20,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:20,654 INFO L93 Difference]: Finished difference Result 151 states and 261 transitions. [2022-11-03 01:43:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:43:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-03 01:43:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:20,667 INFO L225 Difference]: With dead ends: 151 [2022-11-03 01:43:20,668 INFO L226 Difference]: Without dead ends: 74 [2022-11-03 01:43:20,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:43:20,678 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:20,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 86 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:43:20,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-03 01:43:20,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-11-03 01:43:20,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 53 states have (on average 1.3018867924528301) internal successors, (69), 61 states have internal predecessors, (69), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:43:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2022-11-03 01:43:20,738 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 13 [2022-11-03 01:43:20,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:20,738 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2022-11-03 01:43:20,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:43:20,740 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2022-11-03 01:43:20,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-03 01:43:20,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:20,741 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:20,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:43:20,742 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:20,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash 447464406, now seen corresponding path program 1 times [2022-11-03 01:43:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:20,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244998358] [2022-11-03 01:43:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:20,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-03 01:43:23,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:23,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244998358] [2022-11-03 01:43:23,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244998358] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:23,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007690060] [2022-11-03 01:43:23,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:23,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:23,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:23,234 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:23,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:43:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:23,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-03 01:43:23,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:23,655 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 01:43:23,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 01:43:23,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:23,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:43:23,738 INFO L356 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-03 01:43:23,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2022-11-03 01:43:23,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-03 01:43:24,082 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-11-03 01:43:24,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 93 [2022-11-03 01:43:24,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 01:43:24,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:43:24,191 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:43:24,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2022-11-03 01:43:24,216 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_425 (Array Int Int)) (v_ArrVal_426 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_426) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_425) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-03 01:43:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:24,297 INFO L356 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-03 01:43:24,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 104 [2022-11-03 01:43:24,311 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:24,340 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2022-11-03 01:43:24,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 16 [2022-11-03 01:43:24,480 INFO L356 Elim1Store]: treesize reduction 73, result has 19.8 percent of original size [2022-11-03 01:43:24,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 64 [2022-11-03 01:43:24,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2022-11-03 01:43:24,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-03 01:43:24,944 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:24,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 81 [2022-11-03 01:43:24,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2022-11-03 01:43:25,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:25,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007690060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:25,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1332599875] [2022-11-03 01:43:25,263 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 01:43:25,263 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:25,267 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:25,272 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:25,273 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:25,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,398 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-03 01:43:25,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-03 01:43:25,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,504 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:43:25,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:43:25,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:25,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,686 INFO L356 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-03 01:43:25,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 186 [2022-11-03 01:43:25,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:25,815 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-03 01:43:25,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 44 [2022-11-03 01:43:25,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:25,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,846 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:25,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 51 [2022-11-03 01:43:25,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:43:25,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:25,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 01:43:25,943 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 01:43:25,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-03 01:43:25,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,018 INFO L356 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-03 01:43:26,019 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 158 [2022-11-03 01:43:26,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-03 01:43:26,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:26,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-03 01:43:26,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:26,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 01:43:26,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:26,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:26,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:26,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:26,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 01:43:26,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:26,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:26,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,896 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:26,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 496 treesize of output 381 [2022-11-03 01:43:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:26,979 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 01:43:26,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 464 treesize of output 453 [2022-11-03 01:43:27,028 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:43:27,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-03 01:43:27,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2022-11-03 01:43:27,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 01:43:27,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2022-11-03 01:43:27,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,302 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:27,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 31 [2022-11-03 01:43:27,315 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:27,325 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:27,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2022-11-03 01:43:27,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,532 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:27,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 31 [2022-11-03 01:43:27,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:27,556 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:27,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-03 01:43:27,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,797 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:27,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 56 [2022-11-03 01:43:27,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:27,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 01:43:27,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,967 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:27,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:27,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:27,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:43:28,004 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:28,015 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:28,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,226 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:28,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:28,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,250 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:43:28,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:28,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:28,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:28,567 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-03 01:43:28,585 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:28,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,633 INFO L356 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-03 01:43:28,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 104 [2022-11-03 01:43:28,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,674 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 18 [2022-11-03 01:43:28,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:28,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:28,707 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:43:28,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,787 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 01:43:28,788 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 21 [2022-11-03 01:43:28,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,833 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-03 01:43:28,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 100 [2022-11-03 01:43:28,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:28,890 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-03 01:43:28,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:28,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:28,909 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 41 for LOIs [2022-11-03 01:43:28,938 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 27 for LOIs [2022-11-03 01:43:28,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:33,038 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '550#(and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_21| Int)) (and (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|) 0) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_21|))) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_10| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_10|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_10|) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#p1~0#1.base_BEFORE_CALL_10|) 0) 0))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:43:33,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:33,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:33,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2022-11-03 01:43:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27131847] [2022-11-03 01:43:33,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:33,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-03 01:43:33,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:33,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-03 01:43:33,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=991, Unknown=18, NotChecked=64, Total=1190 [2022-11-03 01:43:33,042 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand has 18 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:43:33,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:33,858 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2022-11-03 01:43:33,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-03 01:43:33,859 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 25 [2022-11-03 01:43:33,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:33,864 INFO L225 Difference]: With dead ends: 102 [2022-11-03 01:43:33,864 INFO L226 Difference]: Without dead ends: 99 [2022-11-03 01:43:33,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=139, Invalid=1251, Unknown=20, NotChecked=72, Total=1482 [2022-11-03 01:43:33,866 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 106 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:33,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 341 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 500 Invalid, 0 Unknown, 117 Unchecked, 0.6s Time] [2022-11-03 01:43:33,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-03 01:43:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-11-03 01:43:33,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 78 states have internal predecessors, (88), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:43:33,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2022-11-03 01:43:33,880 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 25 [2022-11-03 01:43:33,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:33,881 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2022-11-03 01:43:33,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 11 states have (on average 2.727272727272727) internal successors, (30), 16 states have internal predecessors, (30), 6 states have call successors, (8), 4 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-03 01:43:33,881 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2022-11-03 01:43:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-03 01:43:33,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:33,882 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:33,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:34,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 509419872, now seen corresponding path program 1 times [2022-11-03 01:43:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784605302] [2022-11-03 01:43:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:36,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:43:36,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784605302] [2022-11-03 01:43:36,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784605302] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:36,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764574074] [2022-11-03 01:43:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:36,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:36,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:36,387 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:36,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-03 01:43:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:36,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-03 01:43:36,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:36,674 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-03 01:43:36,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 3 case distinctions, treesize of input 22 treesize of output 31 [2022-11-03 01:43:36,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-03 01:43:36,814 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 01:43:36,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 01:43:36,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:36,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:43:36,865 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-03 01:43:36,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 42 [2022-11-03 01:43:36,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-11-03 01:43:36,989 INFO L356 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2022-11-03 01:43:36,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 50 [2022-11-03 01:43:37,268 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:37,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2022-11-03 01:43:37,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 01:43:37,365 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:43:37,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-11-03 01:43:37,388 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:37,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2022-11-03 01:43:37,438 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_864 (Array Int Int)) (v_ArrVal_866 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_864) |c_chain_node_#in~ppnode#1.base| v_ArrVal_866)) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (select |c_old(#valid)| |chain_node_~node~0#1.base|) 0))) is different from true [2022-11-03 01:43:37,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,482 INFO L356 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2022-11-03 01:43:37,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 48 [2022-11-03 01:43:37,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,528 INFO L356 Elim1Store]: treesize reduction 8, result has 79.5 percent of original size [2022-11-03 01:43:37,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 51 [2022-11-03 01:43:37,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 01:43:37,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-11-03 01:43:37,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-03 01:43:37,782 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_869 (Array Int Int)) (v_ArrVal_868 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= |chain_node_~node~0#1.base| 0)) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_868) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_869) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|))) is different from true [2022-11-03 01:43:37,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:37,829 INFO L356 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2022-11-03 01:43:37,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 41 [2022-11-03 01:43:37,849 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:37,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:38,023 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:38,024 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-11-03 01:43:38,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2022-11-03 01:43:38,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:38,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764574074] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:38,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313549806] [2022-11-03 01:43:38,216 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-03 01:43:38,216 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:38,216 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:38,217 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:38,217 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:38,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,301 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-03 01:43:38,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-03 01:43:38,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,396 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:43:38,397 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:43:38,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,508 INFO L356 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-03 01:43:38,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 382 treesize of output 158 [2022-11-03 01:43:38,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,588 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-03 01:43:38,589 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 26 [2022-11-03 01:43:38,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,599 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,619 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:38,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2022-11-03 01:43:38,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,650 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 01:43:38,682 INFO L356 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-03 01:43:38,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2022-11-03 01:43:38,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:38,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,773 INFO L356 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-03 01:43:38,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 190 [2022-11-03 01:43:38,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,796 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-03 01:43:38,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-03 01:43:38,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:38,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 23 [2022-11-03 01:43:38,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-11-03 01:43:38,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:43:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:38,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 01:43:38,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:39,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:39,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:39,147 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:39,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:39,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,191 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 01:43:39,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:39,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2022-11-03 01:43:39,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 01:43:39,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 43 [2022-11-03 01:43:39,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 01:43:39,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2022-11-03 01:43:39,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,513 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:39,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 31 [2022-11-03 01:43:39,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:39,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:39,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,694 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:39,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:39,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-03 01:43:39,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:39,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:39,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,938 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:39,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 113 [2022-11-03 01:43:39,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:39,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-03 01:43:39,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 86 [2022-11-03 01:43:39,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 53 [2022-11-03 01:43:40,002 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 01:43:40,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,122 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:40,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,139 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:43:40,149 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:40,159 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:40,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,308 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:40,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:40,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:40,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-11-03 01:43:40,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:40,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:40,706 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-03 01:43:40,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 499 treesize of output 495 [2022-11-03 01:43:41,740 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-03 01:43:41,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,775 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-03 01:43:41,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 100 [2022-11-03 01:43:41,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 18 [2022-11-03 01:43:41,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:41,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:41,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:41,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,853 INFO L356 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-03 01:43:41,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 104 [2022-11-03 01:43:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-03 01:43:41,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:41,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:41,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:41,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:41,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7 [2022-11-03 01:43:41,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:41,952 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 01:43:41,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 11 [2022-11-03 01:43:41,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:43:41,965 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 121 for LOIs [2022-11-03 01:43:42,563 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 125 for LOIs [2022-11-03 01:43:42,715 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:43:50,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1018#(or (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_37 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17| Int) (v_DerPreprocessor_36 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17|) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| 0)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select v_DerPreprocessor_37 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) (not (= 2 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_DerPreprocessor_36) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17|) 0) 0)) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17| 0)) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| 2)))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)) (and (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_24| Int) (v_DerPreprocessor_37 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17| Int) (v_DerPreprocessor_36 (Array Int Int)) (|v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) 0) 0) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17|) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| 0)) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17|) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 4) 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| 0)) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0))) (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) (= (select v_DerPreprocessor_37 0) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17|) 0) 0)) (<= 0 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|) (not (= 2 |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|)) (= (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 8) (= (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) v_DerPreprocessor_36) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17|)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 1) (= (select (select (store (store (store (store |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0) v_DerPreprocessor_36) |v_ULTIMATE.start_create_sll_~#list~0#1.base_24| v_DerPreprocessor_37) (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|) 0)) 0) 0) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_24|)) (not (= |v_ULTIMATE.start_create_sll_#in~pp2#1.base_BEFORE_CALL_17| 0)) (not (= |v_ULTIMATE.start_create_sll_#in~pp1#1.base_BEFORE_CALL_17| 2)))) (= |#NULL.offset| 0) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0)))' at error location [2022-11-03 01:43:50,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:43:50,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:43:50,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 25 [2022-11-03 01:43:50,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305614353] [2022-11-03 01:43:50,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:43:50,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-03 01:43:50,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:43:50,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-03 01:43:50,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1553, Unknown=33, NotChecked=162, Total=1892 [2022-11-03 01:43:50,411 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand has 25 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 20 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:43:51,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:43:51,777 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2022-11-03 01:43:51,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-03 01:43:51,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 20 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 27 [2022-11-03 01:43:51,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:43:51,780 INFO L225 Difference]: With dead ends: 114 [2022-11-03 01:43:51,780 INFO L226 Difference]: Without dead ends: 111 [2022-11-03 01:43:51,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=211, Invalid=2312, Unknown=35, NotChecked=198, Total=2756 [2022-11-03 01:43:51,782 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 142 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-03 01:43:51,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 455 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 663 Invalid, 0 Unknown, 273 Unchecked, 0.6s Time] [2022-11-03 01:43:51,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-03 01:43:51,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 94. [2022-11-03 01:43:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 68 states have (on average 1.2794117647058822) internal successors, (87), 78 states have internal predecessors, (87), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:43:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-11-03 01:43:51,797 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 27 [2022-11-03 01:43:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:43:51,797 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-11-03 01:43:51,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 20 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-03 01:43:51,798 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-11-03 01:43:51,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-03 01:43:51,799 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:43:51,799 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:43:51,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-03 01:43:52,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:52,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:43:52,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:43:52,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1649569260, now seen corresponding path program 1 times [2022-11-03 01:43:52,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:43:52,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442278170] [2022-11-03 01:43:52,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:52,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:43:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:54,834 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-03 01:43:54,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:43:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442278170] [2022-11-03 01:43:54,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442278170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924618156] [2022-11-03 01:43:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:43:54,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:43:54,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:43:54,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:43:54,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-03 01:43:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:43:55,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-03 01:43:55,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:43:55,228 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 01:43:55,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 01:43:55,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:55,241 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:43:55,278 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-11-03 01:43:55,278 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 34 [2022-11-03 01:43:55,280 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2022-11-03 01:43:55,294 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (let ((.cse1 (not (= .cse0 0)))) (or (and (exists ((v_DerPreprocessor_46 (Array Int Int)) (v_DerPreprocessor_47 (Array Int Int))) (and (= v_DerPreprocessor_46 (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_46) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_47) .cse0 v_DerPreprocessor_46) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_47) .cse0)) (= (select v_DerPreprocessor_47 |c_chain_node_#in~ppnode#1.offset|) .cse0))) .cse1) (and .cse1 (not (= .cse0 |c_chain_node_#in~ppnode#1.base|)))))) is different from true [2022-11-03 01:43:55,467 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:55,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 36 [2022-11-03 01:43:55,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 01:43:55,518 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:43:55,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2022-11-03 01:43:55,532 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1405 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (v_ArrVal_1407 (Array Int Int))) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1405) |c_chain_node_#in~ppnode#1.base| v_ArrVal_1407) |c_#memory_$Pointer$.base|) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|))) is different from true [2022-11-03 01:43:55,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,581 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-11-03 01:43:55,582 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2022-11-03 01:43:55,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-03 01:43:55,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-03 01:43:55,678 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1415 (Array Int Int)) (v_ArrVal_1414 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1415) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1414) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2022-11-03 01:43:55,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:55,734 INFO L356 Elim1Store]: treesize reduction 61, result has 37.1 percent of original size [2022-11-03 01:43:55,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 101 [2022-11-03 01:43:55,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:43:55,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:43:55,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:43:55,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:55,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 32 [2022-11-03 01:43:55,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 01:43:55,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:43:56,112 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:56,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1196 treesize of output 1222 [2022-11-03 01:43:56,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2022-11-03 01:43:56,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-11-03 01:43:56,297 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-11-03 01:43:56,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2022-11-03 01:43:56,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:43:56,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924618156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:43:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388584764] [2022-11-03 01:43:56,495 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-03 01:43:56,495 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:43:56,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:43:56,496 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:43:56,496 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:43:56,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,586 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-11-03 01:43:56,587 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-11-03 01:43:56,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,678 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-11-03 01:43:56,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-11-03 01:43:56,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,780 INFO L356 Elim1Store]: treesize reduction 100, result has 29.1 percent of original size [2022-11-03 01:43:56,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 162 [2022-11-03 01:43:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:56,833 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-03 01:43:56,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 26 [2022-11-03 01:43:56,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:43:56,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,860 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:56,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 34 [2022-11-03 01:43:56,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:56,933 INFO L356 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2022-11-03 01:43:56,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 83 treesize of output 35 [2022-11-03 01:43:56,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,007 INFO L356 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2022-11-03 01:43:57,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 386 treesize of output 190 [2022-11-03 01:43:57,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:57,099 INFO L356 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2022-11-03 01:43:57,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 75 treesize of output 44 [2022-11-03 01:43:57,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:57,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:57,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 51 [2022-11-03 01:43:57,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:43:57,172 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:43:57,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:57,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:57,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:57,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 01:43:57,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:57,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-03 01:43:57,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-03 01:43:57,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2022-11-03 01:43:57,505 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 01:43:57,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,524 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:57,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 56 [2022-11-03 01:43:57,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,541 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2022-11-03 01:43:57,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,659 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:57,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:57,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-03 01:43:57,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:57,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:57,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2022-11-03 01:43:57,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:57,819 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:57,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 31 [2022-11-03 01:43:57,829 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:57,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:58,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-03 01:43:58,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:58,225 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-03 01:43:58,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 465 treesize of output 362 [2022-11-03 01:43:58,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:58,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:58,290 INFO L356 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-03 01:43:58,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 436 treesize of output 425 [2022-11-03 01:43:58,329 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:43:58,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,462 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:58,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-03 01:43:58,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:58,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:58,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,600 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:58,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 38 [2022-11-03 01:43:58,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:43:58,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-11-03 01:43:58,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:58,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:59,501 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:43:59,501 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 35 [2022-11-03 01:43:59,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:43:59,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:59,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:43:59,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:43:59,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:44:00,164 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:44:00,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 35 [2022-11-03 01:44:00,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:44:00,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:00,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:00,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:44:01,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:01,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:44:01,167 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:44:01,168 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 35 [2022-11-03 01:44:01,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:44:01,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:01,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:01,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:01,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:44:01,845 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-03 01:44:01,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 35 [2022-11-03 01:44:01,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-03 01:44:01,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:01,882 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:02,052 INFO L356 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2022-11-03 01:44:02,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 428 treesize of output 439 [2022-11-03 01:44:02,184 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:02,539 INFO L197 IcfgInterpreter]: Interpreting procedure chain_node with input of size 12 for LOIs [2022-11-03 01:44:02,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:02,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,574 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-03 01:44:02,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 100 [2022-11-03 01:44:02,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 18 [2022-11-03 01:44:02,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:02,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:02,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:44:02,620 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:44:02,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-03 01:44:02,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:02,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,661 INFO L356 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2022-11-03 01:44:02,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 176 treesize of output 104 [2022-11-03 01:44:02,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,675 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 13 [2022-11-03 01:44:02,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:02,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-11-03 01:44:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:02,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:02,733 INFO L356 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2022-11-03 01:44:02,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 21 [2022-11-03 01:44:02,737 INFO L197 IcfgInterpreter]: Interpreting procedure check_seq_next with input of size 83 for LOIs [2022-11-03 01:44:02,807 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 62 for LOIs [2022-11-03 01:44:02,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-03 01:44:07,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1519#(and (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_create_sll_~#list~0#1.base_27| Int) (|v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38| Int)) (and (<= 0 |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) (= 8 (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0))) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38|) (= 0 (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38|) 0)) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38| 0)) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_27| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0))) (= (select |#valid| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0) (<= 0 |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38|) (< |#StackHeapBarrier| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0)) 4) 0) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0) 0)) (< (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0) |#StackHeapBarrier|) (not (= 2 |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|)) (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0)) 1) (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0)) 4) 0) (not (= |v_ULTIMATE.start_create_sll_~#list~0#1.base_27| 0)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38| |v_ULTIMATE.start_create_sll_~#list~0#1.base_27|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38|) 0) 0) (not (= |v_ULTIMATE.start_create_sll_~pp1#1.base_BEFORE_CALL_38| 2)))) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-03 01:44:07,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-03 01:44:07,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-03 01:44:07,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2022-11-03 01:44:07,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448263469] [2022-11-03 01:44:07,029 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-03 01:44:07,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-03 01:44:07,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:44:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-03 01:44:07,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1055, Unknown=20, NotChecked=204, Total=1406 [2022-11-03 01:44:07,031 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 22 states, 13 states have (on average 2.769230769230769) internal successors, (36), 20 states have internal predecessors, (36), 8 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:44:08,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:44:08,224 INFO L93 Difference]: Finished difference Result 112 states and 139 transitions. [2022-11-03 01:44:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-03 01:44:08,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 13 states have (on average 2.769230769230769) internal successors, (36), 20 states have internal predecessors, (36), 8 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 30 [2022-11-03 01:44:08,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:44:08,225 INFO L225 Difference]: With dead ends: 112 [2022-11-03 01:44:08,225 INFO L226 Difference]: Without dead ends: 109 [2022-11-03 01:44:08,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=177, Invalid=1533, Unknown=24, NotChecked=246, Total=1980 [2022-11-03 01:44:08,227 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 112 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:44:08,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 432 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 621 Invalid, 0 Unknown, 389 Unchecked, 0.7s Time] [2022-11-03 01:44:08,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-03 01:44:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 105. [2022-11-03 01:44:08,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 78 states have (on average 1.2820512820512822) internal successors, (100), 88 states have internal predecessors, (100), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-03 01:44:08,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2022-11-03 01:44:08,243 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 30 [2022-11-03 01:44:08,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:44:08,243 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2022-11-03 01:44:08,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 13 states have (on average 2.769230769230769) internal successors, (36), 20 states have internal predecessors, (36), 8 states have call successors, (10), 4 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-11-03 01:44:08,244 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2022-11-03 01:44:08,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-03 01:44:08,245 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:44:08,245 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:44:08,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-03 01:44:08,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-03 01:44:08,467 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:44:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:44:08,467 INFO L85 PathProgramCache]: Analyzing trace with hash -51371764, now seen corresponding path program 1 times [2022-11-03 01:44:08,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:44:08,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928791535] [2022-11-03 01:44:08,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:08,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:44:08,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:12,891 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:44:12,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:44:12,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928791535] [2022-11-03 01:44:12,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928791535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:44:12,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350754164] [2022-11-03 01:44:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:44:12,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:44:12,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:44:12,893 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:44:12,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-03 01:44:13,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:44:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 165 conjunts are in the unsatisfiable core [2022-11-03 01:44:13,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:44:13,207 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-11-03 01:44:13,284 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 01:44:13,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 01:44:13,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:44:13,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:44:13,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:13,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:13,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 9 [2022-11-03 01:44:13,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 01:44:13,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-11-03 01:44:13,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-03 01:44:13,591 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 01:44:13,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 01:44:13,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:44:13,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:44:13,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-03 01:44:13,698 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 11 [2022-11-03 01:44:13,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:13,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:44:14,287 INFO L356 Elim1Store]: treesize reduction 213, result has 17.1 percent of original size [2022-11-03 01:44:14,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 7 new quantified variables, introduced 11 case distinctions, treesize of input 344 treesize of output 377 [2022-11-03 01:44:14,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 199 [2022-11-03 01:44:14,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:14,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:44:16,964 INFO L356 Elim1Store]: treesize reduction 500, result has 26.6 percent of original size [2022-11-03 01:44:16,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 10 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 646 treesize of output 2000 [2022-11-03 01:44:17,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 220 treesize of output 218 [2022-11-03 01:44:23,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:24,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:25,946 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:26,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:44:26,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-03 01:44:28,064 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-11-03 01:44:30,397 INFO L244 Elim1Store]: Index analysis took 301 ms [2022-11-03 01:44:31,864 INFO L356 Elim1Store]: treesize reduction 508, result has 34.6 percent of original size [2022-11-03 01:44:31,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 8 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 25 case distinctions, treesize of input 5973 treesize of output 7879 [2022-11-03 01:45:08,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:08,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:08,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 574 treesize of output 2771 [2022-11-03 01:45:09,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:09,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:09,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:09,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:09,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:09,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:09,320 INFO L244 Elim1Store]: Index analysis took 127 ms [2022-11-03 01:45:09,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 563 treesize of output 1117 [2022-11-03 01:45:10,171 INFO L244 Elim1Store]: Index analysis took 578 ms [2022-11-03 01:45:10,967 INFO L356 Elim1Store]: treesize reduction 418, result has 26.0 percent of original size [2022-11-03 01:45:10,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 21 case distinctions, treesize of input 4022 treesize of output 5505 [2022-11-03 01:45:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,305 INFO L244 Elim1Store]: Index analysis took 114 ms [2022-11-03 01:45:23,307 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 10 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 563 treesize of output 1117 [2022-11-03 01:45:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:23,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:23,671 INFO L244 Elim1Store]: Index analysis took 135 ms [2022-11-03 01:45:23,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 563 treesize of output 1117 [2022-11-03 01:45:25,764 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no need to replace index [2022-11-03 01:45:25,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1965633986] [2022-11-03 01:45:25,767 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-03 01:45:25,767 INFO L166 IcfgInterpreter]: Building call graph [2022-11-03 01:45:25,768 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-03 01:45:25,768 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-03 01:45:25,768 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-03 01:45:25,792 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@61daa079 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:134) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:401) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:122) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:627) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:606) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:528) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:332) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:188) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:295) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:119) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 01:45:25,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-03 01:45:25,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-11-03 01:45:25,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856934295] [2022-11-03 01:45:25,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-03 01:45:25,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-03 01:45:25,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:45:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-03 01:45:25,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:45:25,804 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 17 states, 10 states have (on average 2.3) internal successors, (23), 13 states have internal predecessors, (23), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-03 01:45:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:45:25,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2022-11-03 01:45:25,806 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:25,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:45:25,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:26,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:45:26,014 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@61daa079 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:460) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:104) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.chooseFalseSuccessor2(BasicAbstractInterpolantAutomaton.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:73) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:246) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:218) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:210) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:353) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-03 01:45:26,016 INFO L158 Benchmark]: Toolchain (without parser) took 127608.17ms. Allocated memory was 98.6MB in the beginning and 901.8MB in the end (delta: 803.2MB). Free memory was 62.7MB in the beginning and 792.8MB in the end (delta: -730.2MB). Peak memory consumption was 73.1MB. Max. memory is 16.1GB. [2022-11-03 01:45:26,016 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 98.6MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 30.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-03 01:45:26,017 INFO L158 Benchmark]: CACSL2BoogieTranslator took 559.53ms. Allocated memory was 98.6MB in the beginning and 134.2MB in the end (delta: 35.7MB). Free memory was 62.5MB in the beginning and 100.2MB in the end (delta: -37.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-03 01:45:26,017 INFO L158 Benchmark]: Boogie Procedure Inliner took 85.60ms. Allocated memory is still 134.2MB. Free memory was 100.2MB in the beginning and 97.4MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-03 01:45:26,017 INFO L158 Benchmark]: Boogie Preprocessor took 66.84ms. Allocated memory is still 134.2MB. Free memory was 97.4MB in the beginning and 95.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-03 01:45:26,017 INFO L158 Benchmark]: RCFGBuilder took 928.72ms. Allocated memory is still 134.2MB. Free memory was 95.3MB in the beginning and 65.2MB in the end (delta: 30.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-03 01:45:26,018 INFO L158 Benchmark]: TraceAbstraction took 125947.04ms. Allocated memory was 134.2MB in the beginning and 901.8MB in the end (delta: 767.6MB). Free memory was 64.5MB in the beginning and 792.8MB in the end (delta: -728.3MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. [2022-11-03 01:45:26,019 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 98.6MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 30.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 559.53ms. Allocated memory was 98.6MB in the beginning and 134.2MB in the end (delta: 35.7MB). Free memory was 62.5MB in the beginning and 100.2MB in the end (delta: -37.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 85.60ms. Allocated memory is still 134.2MB. Free memory was 100.2MB in the beginning and 97.4MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 66.84ms. Allocated memory is still 134.2MB. Free memory was 97.4MB in the beginning and 95.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 928.72ms. Allocated memory is still 134.2MB. Free memory was 95.3MB in the beginning and 65.2MB in the end (delta: 30.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * TraceAbstraction took 125947.04ms. Allocated memory was 134.2MB in the beginning and 901.8MB in the end (delta: 767.6MB). Free memory was 64.5MB in the beginning and 792.8MB in the end (delta: -728.3MB). Peak memory consumption was 42.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@61daa079 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@61daa079: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-11-03 01:45:26,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-03 01:45:28,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:45:28,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:45:28,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:45:28,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:45:28,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:45:28,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:45:28,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:45:28,433 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:45:28,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:45:28,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:45:28,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:45:28,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:45:28,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:45:28,449 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:45:28,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:45:28,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:45:28,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:45:28,455 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:45:28,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:45:28,465 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:45:28,471 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:45:28,472 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:45:28,474 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:45:28,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:45:28,481 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:45:28,481 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:45:28,482 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:45:28,484 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:45:28,485 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:45:28,486 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:45:28,486 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:45:28,488 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:45:28,489 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:45:28,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:45:28,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:45:28,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:45:28,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:45:28,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:45:28,494 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:45:28,495 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:45:28,495 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2022-11-03 01:45:28,533 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:45:28,534 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:45:28,535 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:45:28,535 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:45:28,536 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:45:28,536 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:45:28,537 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:45:28,537 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:45:28,537 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:45:28,537 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:45:28,538 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:45:28,539 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:45:28,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:45:28,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:45:28,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:45:28,541 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:45:28,541 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:45:28,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:45:28,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:45:28,542 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-03 01:45:28,542 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-03 01:45:28,542 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-03 01:45:28,542 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:45:28,542 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:45:28,543 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:45:28,543 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:45:28,543 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:45:28,543 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-03 01:45:28,543 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:45:28,544 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:45:28,544 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:45:28,544 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:45:28,545 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:45:28,545 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2022-11-03 01:45:28,545 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-03 01:45:28,545 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:45:28,545 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:45:28,546 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-03 01:45:28,546 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2022-11-03 01:45:28,953 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:45:28,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:45:28,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:45:28,993 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:45:28,994 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:45:28,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-03 01:45:29,066 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/121db2448/37f65be22e544e27a2edbb58e6c4c6e7/FLAGd2af4252d [2022-11-03 01:45:29,619 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:45:29,619 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2022-11-03 01:45:29,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/121db2448/37f65be22e544e27a2edbb58e6c4c6e7/FLAGd2af4252d [2022-11-03 01:45:29,926 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/data/121db2448/37f65be22e544e27a2edbb58e6c4c6e7 [2022-11-03 01:45:29,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:45:29,929 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:45:29,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:45:29,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:45:29,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:45:29,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:45:29" (1/1) ... [2022-11-03 01:45:29,937 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c40a49e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:29, skipping insertion in model container [2022-11-03 01:45:29,937 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:45:29" (1/1) ... [2022-11-03 01:45:29,945 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:45:29,977 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:45:30,267 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-03 01:45:30,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:45:30,307 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:45:30,364 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2022-11-03 01:45:30,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:45:30,439 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:45:30,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30 WrapperNode [2022-11-03 01:45:30,439 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:45:30,440 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:45:30,441 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:45:30,441 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:45:30,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,523 INFO L138 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 198 [2022-11-03 01:45:30,524 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:45:30,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:45:30,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:45:30,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:45:30,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,565 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,567 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,574 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:45:30,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:45:30,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:45:30,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:45:30,580 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (1/1) ... [2022-11-03 01:45:30,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:45:30,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:45:30,612 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:45:30,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:45:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2022-11-03 01:45:30,671 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2022-11-03 01:45:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-03 01:45:30,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:45:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:45:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-03 01:45:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-03 01:45:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2022-11-03 01:45:30,672 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2022-11-03 01:45:30,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:45:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-03 01:45:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-03 01:45:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2022-11-03 01:45:30,673 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2022-11-03 01:45:30,673 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2022-11-03 01:45:30,673 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2022-11-03 01:45:30,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:45:30,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:45:30,832 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:45:30,835 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:45:31,347 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:45:31,356 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:45:31,356 INFO L300 CfgBuilder]: Removed 33 assume(true) statements. [2022-11-03 01:45:31,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:31 BoogieIcfgContainer [2022-11-03 01:45:31,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:45:31,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:45:31,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:45:31,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:45:31,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:45:29" (1/3) ... [2022-11-03 01:45:31,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b38715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:45:31, skipping insertion in model container [2022-11-03 01:45:31,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:45:30" (2/3) ... [2022-11-03 01:45:31,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11b38715 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:45:31, skipping insertion in model container [2022-11-03 01:45:31,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:45:31" (3/3) ... [2022-11-03 01:45:31,377 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2022-11-03 01:45:31,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:45:31,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-03 01:45:31,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:45:31,459 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6ee7aed9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:45:31,459 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-03 01:45:31,463 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 79 states have internal predecessors, (123), 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) [2022-11-03 01:45:31,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-03 01:45:31,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:31,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:31,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:31,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:31,478 INFO L85 PathProgramCache]: Analyzing trace with hash -467593890, now seen corresponding path program 1 times [2022-11-03 01:45:31,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:31,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424064194] [2022-11-03 01:45:31,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:31,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:31,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:31,498 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:31,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-03 01:45:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:31,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-03 01:45:31,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:45:31,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-03 01:45:31,771 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2022-11-03 01:45:31,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424064194] [2022-11-03 01:45:31,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [424064194] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:45:31,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:45:31,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:45:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187449230] [2022-11-03 01:45:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:45:31,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-03 01:45:31,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2022-11-03 01:45:31,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-03 01:45:31,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:45:31,822 INFO L87 Difference]: Start difference. First operand has 93 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 79 states have internal predecessors, (123), 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:31,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:45:31,888 INFO L93 Difference]: Finished difference Result 182 states and 320 transitions. [2022-11-03 01:45:31,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-03 01:45:31,891 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-03 01:45:31,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:45:31,907 INFO L225 Difference]: With dead ends: 182 [2022-11-03 01:45:31,914 INFO L226 Difference]: Without dead ends: 85 [2022-11-03 01:45:31,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-03 01:45:31,929 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-03 01:45:31,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-03 01:45:31,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-03 01:45:31,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-11-03 01:45:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.25) internal successors, (80), 72 states have internal predecessors, (80), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-03 01:45:31,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2022-11-03 01:45:31,977 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 16 [2022-11-03 01:45:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:45:31,978 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2022-11-03 01:45:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:45:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2022-11-03 01:45:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-03 01:45:31,980 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:45:31,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:45:31,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:45:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 [2022-11-03 01:45:32,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-03 01:45:32,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:45:32,192 INFO L85 PathProgramCache]: Analyzing trace with hash -485270813, now seen corresponding path program 1 times [2022-11-03 01:45:32,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2022-11-03 01:45:32,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [479144090] [2022-11-03 01:45:32,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:45:32,194 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-03 01:45:32,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat [2022-11-03 01:45:32,195 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-03 01:45:32,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_55198c41-63b4-4de1-b55b-62f964a3cc87/bin/utaipan-7li7fVZpFI/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-03 01:45:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:45:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-03 01:45:32,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:45:33,064 INFO L356 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2022-11-03 01:45:33,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2022-11-03 01:45:33,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-03 01:45:33,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:45:33,219 INFO L356 Elim1Store]: treesize reduction 25, result has 3.8 percent of original size [2022-11-03 01:45:33,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 26 [2022-11-03 01:45:33,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2022-11-03 01:45:33,269 WARN L855 $PredicateComparison]: unable to prove that (and (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))) (or (and (= |c_chain_node_#in~ppnode#1.base| .cse0) (not (= |c_chain_node_#in~ppnode#1.base| (_ bv0 32)))) (and (not (= .cse0 (_ bv0 32))) (exists ((v_DerPreprocessor_1 (Array (_ BitVec 32) (_ BitVec 32))) (v_DerPreprocessor_2 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= .cse0 (select v_DerPreprocessor_2 |c_chain_node_#in~ppnode#1.offset|)) (= (select (store (store (store (store |c_#memory_$Pointer$.base| .cse0 v_DerPreprocessor_1) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_2) .cse0 v_DerPreprocessor_1) |c_chain_node_#in~ppnode#1.base| v_DerPreprocessor_2) .cse0) (select |c_#memory_$Pointer$.base| .cse0))))))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2022-11-03 01:45:33,687 INFO L356 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2022-11-03 01:45:33,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 91 [2022-11-03 01:45:33,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-11-03 01:45:33,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2022-11-03 01:45:33,867 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-03 01:45:33,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2022-11-03 01:45:34,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-03 01:45:34,924 INFO L356 Elim1Store]: treesize reduction 151, result has 32.9 percent of original size [2022-11-03 01:45:34,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 138 treesize of output 309 [2022-11-03 01:45:35,526 INFO L356 Elim1Store]: treesize reduction 55, result has 38.2 percent of original size [2022-11-03 01:45:35,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 218 [2022-11-03 01:45:37,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1665 treesize of output 1379 [2022-11-03 01:45:40,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:40,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 7 [2022-11-03 01:45:41,338 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 01:45:41,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 94 [2022-11-03 01:45:41,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:41,677 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 72 [2022-11-03 01:45:41,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:41,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 7 [2022-11-03 01:45:41,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:41,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 01:45:41,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:41,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-03 01:45:42,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:42,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 75 treesize of output 87 [2022-11-03 01:45:42,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:42,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-03 01:45:43,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:43,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 40 treesize of output 44 [2022-11-03 01:45:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 49 treesize of output 52 [2022-11-03 01:45:44,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 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 53 treesize of output 56 [2022-11-03 01:45:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-03 01:45:44,413 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-11-03 01:45:44,414 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 63 [2022-11-03 01:47:26,071 WARN L234 SmtUtils]: Spent 1.58m on a formula simplification. DAG size of input: 37 DAG size of output: 19 (called from [L 353] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-03 01:47:26,072 INFO L356 Elim1Store]: treesize reduction 65, result has 28.6 percent of original size [2022-11-03 01:47:26,144 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 55084054585 treesize of output 41153918330